From 687e352209b0665fc6589711bdca7914f0d946a0 Mon Sep 17 00:00:00 2001
From: Rich Harris <richard.a.harris@gmail.com>
Date: Fri, 8 Feb 2019 08:48:10 -0500
Subject: [PATCH 1/3] rename .html files to .svelte

---
 test/cli/samples/basic/src/{Main.html => Main.svelte} |  0
 .../custom-element/src/{Main.html => Main.svelte}     |  0
 test/cli/samples/dev/src/{Main.html => Main.svelte}   |  0
 test/cli/samples/dir-sourcemap/src/Main.html          |  5 -----
 test/cli/samples/dir-sourcemap/src/Main.svelte        |  5 +++++
 .../dir-sourcemap/src/{Widget.html => Widget.svelte}  |  0
 test/cli/samples/dir-subdir/src/Main.html             |  5 -----
 test/cli/samples/dir-subdir/src/Main.svelte           |  5 +++++
 .../src/widget/{Widget.html => Widget.svelte}         |  0
 test/cli/samples/dir/src/Main.html                    |  5 -----
 test/cli/samples/dir/src/Main.svelte                  |  5 +++++
 .../samples/dir/src/{Widget.html => Widget.svelte}    |  0
 .../samples/globals/src/{Main.html => Main.svelte}    |  0
 .../sourcemap-inline/src/{Main.html => Main.svelte}   |  0
 .../samples/sourcemap/src/{Main.html => Main.svelte}  |  0
 test/cli/samples/ssr/src/{Main.html => Main.svelte}   |  0
 test/cli/samples/store/src/{Main.html => Main.svelte} |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 test/css/samples/basic/{input.html => input.svelte}   |  0
 .../{expected.html => expected.svelte}                |  0
 .../combinator-child/{input.html => input.svelte}     |  0
 .../css/samples/css-vars/{input.html => input.svelte} |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../samples/empty-class/{input.html => input.svelte}  |  0
 .../empty-rule-dev/{input.html => input.svelte}       |  0
 .../samples/empty-rule/{input.html => input.svelte}   |  0
 .../global-keyframes/{input.html => input.svelte}     |  0
 test/css/samples/global/{input.html => input.svelte}  |  0
 .../{input.html => input.svelte}                      |  0
 .../keyframes-from-to/{input.html => input.svelte}    |  0
 .../samples/keyframes/{input.html => input.svelte}    |  0
 .../local-inside-global/{input.html => input.svelte}  |  0
 .../media-query-word/{input.html => input.svelte}     |  0
 .../samples/media-query/{input.html => input.svelte}  |  0
 .../samples/nested/{expected.html => expected.svelte} |  0
 test/css/samples/nested/{input.html => input.svelte}  |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../pseudo-element/{input.html => input.svelte}       |  0
 test/css/samples/spread/{input.html => input.svelte}  |  0
 .../supports-query/{input.html => input.svelte}       |  0
 .../universal-selector/{input.html => input.svelte}   |  0
 .../unknown-at-rule/{input.html => input.svelte}      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../{input.html => input.svelte}                      |  0
 .../{expected.html => expected.svelte}                |  0
 .../unused-selector/{input.html => input.svelte}      |  0
 .../samples/custom-method/{main.html => main.svelte}  |  0
 .../samples/escaped-css/{main.html => main.svelte}    |  0
 .../samples/html-slots/{main.html => main.svelte}     |  0
 .../samples/html/{main.html => main.svelte}           |  0
 .../nested.skip/{Counter.html => Counter.svelte}      |  0
 .../samples/nested.skip/{main.html => main.svelte}    |  2 +-
 .../samples/new-styled/{main.html => main.svelte}     |  0
 .../samples/new/{main.html => main.svelte}            |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/oncreate/{main.html => main.svelte}       |  0
 .../samples/props/{main.html => main.svelte}          |  2 +-
 .../props/{my-widget.html => my-widget.svelte}        |  0
 .../samples/basic/{_after.html => _after.svelte}      |  0
 .../samples/basic/{_before.html => _before.svelte}    |  0
 .../samples/basic/{main.html => main.svelte}          |  0
 .../binding-input/{_after.html => _after.svelte}      |  0
 .../binding-input/{_before.html => _before.svelte}    |  0
 .../samples/binding-input/{main.html => main.svelte}  |  0
 .../{Nested.html => Nested.svelte}                    |  0
 .../{_after.html => _after.svelte}                    |  0
 .../{_before.html => _before.svelte}                  |  0
 test/hydration/samples/component-in-element/main.html |  7 -------
 .../samples/component-in-element/main.svelte          |  7 +++++++
 .../samples/component/{Nested.html => Nested.svelte}  |  0
 .../samples/component/{_after.html => _after.svelte}  |  0
 .../component/{_before.html => _before.svelte}        |  0
 test/hydration/samples/component/main.html            |  5 -----
 test/hydration/samples/component/main.svelte          |  5 +++++
 .../{_after.html => _after.svelte}                    |  0
 .../{_before.html => _before.svelte}                  |  0
 .../dynamic-text-changed/{main.html => main.svelte}   |  0
 .../dynamic-text/{_after.html => _after.svelte}       |  0
 .../dynamic-text/{_before.html => _before.svelte}     |  0
 .../samples/dynamic-text/{main.html => main.svelte}   |  0
 .../{_after.html => _after.svelte}                    |  0
 .../{_before.html => _before.svelte}                  |  0
 .../each-block-arg-clash/{main.html => main.svelte}   |  0
 .../samples/each-block/{_after.html => _after.svelte} |  0
 .../each-block/{_before.html => _before.svelte}       |  0
 .../samples/each-block/{main.html => main.svelte}     |  0
 .../{_after.html => _after.svelte}                    |  0
 .../{_before.html => _before.svelte}                  |  0
 .../{main.html => main.svelte}                        |  0
 .../{_after.html => _after.svelte}                    |  0
 .../{_before.html => _before.svelte}                  |  0
 .../{main.html => main.svelte}                        |  0
 .../{_after.html => _after.svelte}                    |  0
 .../{_before.html => _before.svelte}                  |  0
 .../{main.html => main.svelte}                        |  0
 .../{_after.html => _after.svelte}                    |  0
 .../{_before.html => _before.svelte}                  |  0
 .../{main.html => main.svelte}                        |  0
 .../element-nested/{_after.html => _after.svelte}     |  0
 .../element-nested/{_before.html => _before.svelte}   |  0
 .../samples/element-nested/{main.html => main.svelte} |  0
 .../element-ref/{_after.html => _after.svelte}        |  0
 .../element-ref/{_before.html => _before.svelte}      |  0
 .../samples/element-ref/{main.html => main.svelte}    |  0
 .../event-handler/{_after.html => _after.svelte}      |  0
 .../event-handler/{_before.html => _before.svelte}    |  0
 .../samples/event-handler/{main.html => main.svelte}  |  0
 .../if-block-anchor/{_after.html => _after.svelte}    |  0
 .../if-block-anchor/{_before.html => _before.svelte}  |  0
 .../if-block-anchor/{main.html => main.svelte}        |  0
 .../if-block-false/{_after.html => _after.svelte}     |  0
 .../if-block-false/{_before.html => _before.svelte}   |  0
 .../samples/if-block-false/{main.html => main.svelte} |  0
 .../if-block-update/{_after.html => _after.svelte}    |  0
 .../if-block-update/{_before.html => _before.svelte}  |  0
 .../if-block-update/{main.html => main.svelte}        |  0
 .../samples/if-block/{_after.html => _after.svelte}   |  0
 .../samples/if-block/{_before.html => _before.svelte} |  0
 .../samples/if-block/{main.html => main.svelte}       |  0
 .../samples/raw/{_after.html => _after.svelte}        |  0
 .../samples/raw/{_before.html => _before.svelte}      |  0
 test/hydration/samples/raw/{main.html => main.svelte} |  0
 .../top-level-text/{_after.html => _after.svelte}     |  0
 .../top-level-text/{_before.html => _before.svelte}   |  0
 .../samples/top-level-text/{main.html => main.svelte} |  0
 .../{input.html => input.svelte}                      |  0
 test/js/samples/action/{input.html => input.svelte}   |  0
 .../bind-width-height/{input.html => input.svelte}    |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../component-static/{input.html => input.svelte}     |  0
 .../{input.html => input.svelte}                      |  0
 .../css-media-query/{input.html => input.svelte}      |  0
 .../{input.html => input.svelte}                      |  0
 .../samples/debug-empty/{input.html => input.svelte}  |  0
 .../{input.html => input.svelte}                      |  0
 .../js/samples/debug-foo/{input.html => input.svelte} |  0
 .../debug-ssr-foo/{input.html => input.svelte}        |  0
 .../deconflict-builtins/{input.html => input.svelte}  |  0
 .../deconflict-globals/{input.html => input.svelte}   |  0
 .../{input.html => input.svelte}                      |  0
 .../do-use-dataset/{input.html => input.svelte}       |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 test/js/samples/dynamic-import/input.html             |  5 -----
 test/js/samples/dynamic-import/input.svelte           |  5 +++++
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../each-block-keyed/{input.html => input.svelte}     |  0
 .../{input.html => input.svelte}                      |  0
 .../event-modifiers/{input.html => input.svelte}      |  0
 .../head-no-whitespace/{input.html => input.svelte}   |  0
 .../hoisted-const/{input.html => input.svelte}        |  0
 .../samples/hoisted-let/{input.html => input.svelte}  |  0
 .../if-block-no-update/{input.html => input.svelte}   |  0
 .../if-block-simple/{input.html => input.svelte}      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../samples/input-files/{input.html => input.svelte}  |  0
 .../samples/input-range/{input.html => input.svelte}  |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../legacy-input-type/{input.html => input.svelte}    |  0
 .../media-bindings/{input.html => input.svelte}       |  0
 test/js/samples/non-imported-component/input.html     |  6 ------
 test/js/samples/non-imported-component/input.svelte   |  6 ++++++
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../select-dynamic-value/{input.html => input.svelte} |  0
 .../samples/setup-method/{input.html => input.svelte} |  0
 .../ssr-no-oncreate-etc/{input.html => input.svelte}  |  0
 .../{input.html => input.svelte}                      |  0
 .../js/samples/svg-title/{input.html => input.svelte} |  0
 test/js/samples/title/{input.html => input.svelte}    |  0
 .../transition-local/{input.html => input.svelte}     |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../action-with-call/{input.html => input.svelte}     |  0
 .../{input.html => input.svelte}                      |  0
 .../action-with-literal/{input.html => input.svelte}  |  0
 .../samples/action/{input.html => input.svelte}       |  0
 .../samples/animation/{input.html => input.svelte}    |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../attribute-dynamic/{input.html => input.svelte}    |  0
 .../attribute-escaped/{input.html => input.svelte}    |  0
 .../attribute-multiple/{input.html => input.svelte}   |  0
 .../attribute-shorthand/{input.html => input.svelte}  |  0
 .../{input.html => input.svelte}                      |  0
 .../attribute-static/{input.html => input.svelte}     |  0
 .../{input.html => input.svelte}                      |  0
 .../attribute-unquoted/{input.html => input.svelte}   |  0
 .../await-then-catch/{input.html => input.svelte}     |  0
 .../binding-shorthand/{input.html => input.svelte}    |  0
 .../samples/binding/{input.html => input.svelte}      |  0
 .../samples/comment/{input.html => input.svelte}      |  0
 .../component-dynamic/{input.html => input.svelte}    |  0
 .../{input.html => input.svelte}                      |  0
 .../convert-entities/{input.html => input.svelte}     |  0
 test/parser/samples/css/{input.html => input.svelte}  |  0
 .../dynamic-import/{input.html => input.svelte}       |  0
 .../{input.html => input.svelte}                      |  0
 .../each-block-else/{input.html => input.svelte}      |  0
 .../each-block-indexed/{input.html => input.svelte}   |  0
 .../each-block-keyed/{input.html => input.svelte}     |  0
 .../samples/each-block/{input.html => input.svelte}   |  0
 .../{input.html => input.svelte}                      |  0
 .../element-with-text/{input.html => input.svelte}    |  0
 .../samples/elements/{input.html => input.svelte}     |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../samples/error-css/{input.html => input.svelte}    |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../error-self-reference/{input.html => input.svelte} |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../error-void-closing/{input.html => input.svelte}   |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../event-handler/{input.html => input.svelte}        |  0
 .../if-block-else/{input.html => input.svelte}        |  0
 .../if-block-elseif/{input.html => input.svelte}      |  0
 .../samples/if-block/{input.html => input.svelte}     |  0
 .../implicitly-closed-li/{input.html => input.svelte} |  0
 test/parser/samples/nbsp/{input.html => input.svelte} |  0
 .../raw-mustaches/{input.html => input.svelte}        |  0
 test/parser/samples/refs/{input.html => input.svelte} |  0
 .../script-comment-only/{input.html => input.svelte}  |  0
 .../{input.html => input.svelte}                      |  0
 .../{input.html => input.svelte}                      |  0
 .../samples/script/{input.html => input.svelte}       |  0
 .../self-closing-element/{input.html => input.svelte} |  0
 .../self-reference/{input.html => input.svelte}       |  0
 .../{input.html => input.svelte}                      |  0
 .../samples/spread/{input.html => input.svelte}       |  0
 .../textarea-children/{input.html => input.svelte}    |  0
 .../{input.html => input.svelte}                      |  0
 .../transition-intro/{input.html => input.svelte}     |  0
 .../unusual-identifier/{input.html => input.svelte}   |  0
 .../{input.html => input.svelte}                      |  0
 .../whitespace-normal/{input.html => input.svelte}    |  0
 .../parser/samples/yield/{input.html => input.svelte} |  0
 .../samples/dependencies/{input.html => input.svelte} |  0
 .../dependencies/{output.html => output.svelte}       |  0
 .../samples/filename/{input.html => input.svelte}     |  0
 .../samples/filename/{output.html => output.svelte}   |  2 +-
 .../samples/ignores-null/{input.html => input.svelte} |  0
 .../ignores-null/{output.html => output.svelte}       |  0
 .../samples/markup/{input.html => input.svelte}       |  0
 .../samples/markup/{output.html => output.svelte}     |  0
 .../{input.html => input.svelte}                      |  0
 .../{output.html => output.svelte}                    |  0
 .../script-multiple/{input.html => input.svelte}      |  0
 .../script-multiple/{output.html => output.svelte}    |  0
 .../samples/script/{input.html => input.svelte}       |  0
 .../samples/script/{output.html => output.svelte}     |  0
 .../samples/style-async/{input.html => input.svelte}  |  0
 .../style-async/{output.html => output.svelte}        |  0
 .../style-attributes/{input.html => input.svelte}     |  0
 .../style-attributes/{output.html => output.svelte}   |  0
 .../samples/style/{input.html => input.svelte}        |  0
 .../samples/style/{output.html => output.svelte}      |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../action-function/{main.html => main.svelte}        |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/action-this/{main.html => main.svelte}    |  0
 .../samples/action-update/{main.html => main.svelte}  |  0
 .../runtime/samples/action/{main.html => main.svelte} |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/animation-css/{main.html => main.svelte}  |  0
 .../animation-js-delay/{main.html => main.svelte}     |  0
 .../animation-js-easing/{main.html => main.svelte}    |  0
 .../samples/animation-js/{main.html => main.svelte}   |  0
 .../assignment-in-init/{main.html => main.svelte}     |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../attribute-boolean-true/{main.html => main.svelte} |  0
 .../attribute-casing/{main.html => main.svelte}       |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../attribute-dynamic-type/{main.html => main.svelte} |  0
 .../attribute-dynamic/{main.html => main.svelte}      |  0
 .../attribute-empty-svg/{main.html => main.svelte}    |  0
 .../attribute-empty/{main.html => main.svelte}        |  0
 .../attribute-namespaced/{main.html => main.svelte}   |  0
 .../{Component.html => Component.svelte}              |  0
 .../samples/attribute-partial-number/main.html        |  5 -----
 .../samples/attribute-partial-number/main.svelte      |  5 +++++
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../attribute-static/{main.html => main.svelte}       |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/autofocus/{main.html => main.svelte}      |  0
 .../await-component-oncreate/{Foo.html => Foo.svelte} |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../await-containing-if/{main.html => main.svelte}    |  0
 .../samples/await-in-each/{main.html => main.svelte}  |  0
 .../await-set-simultaneous/{main.html => main.svelte} |  0
 .../{main.html => main.svelte}                        |  0
 .../await-then-catch-event/{main.html => main.svelte} |  0
 .../await-then-catch-if/{main.html => main.svelte}    |  0
 .../await-then-catch-in-slot/{Foo.html => Foo.svelte} |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../await-then-catch-order/{main.html => main.svelte} |  0
 .../{main.html => main.svelte}                        |  0
 .../await-then-catch/{main.html => main.svelte}       |  0
 .../await-then-shorthand/{main.html => main.svelte}   |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../await-with-components/{main.html => main.svelte}  |  2 +-
 .../before-render-chain/{Item.html => Item.svelte}    |  0
 .../before-render-chain/{List.html => List.svelte}    |  2 +-
 .../before-render-chain/{main.html => main.svelte}    |  2 +-
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../binding-indirect/{main.html => main.svelte}       |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../binding-input-checkbox/{main.html => main.svelte} |  0
 .../binding-input-number/{main.html => main.svelte}   |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../binding-input-range/{main.html => main.svelte}    |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../binding-input-text/{main.html => main.svelte}     |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{Modal.html => Modal.svelte}                      |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../binding-select-late/{main.html => main.svelte}    |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/binding-select/{main.html => main.svelte} |  0
 .../binding-store-deep/{main.html => main.svelte}     |  0
 .../samples/binding-store/{main.html => main.svelte}  |  0
 .../binding-textarea/{main.html => main.svelte}       |  0
 .../binding-this-and-value/{main.html => main.svelte} |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../binding-this-unset/{main.html => main.svelte}     |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/binding-this/{main.html => main.svelte}   |  0
 .../bindings-before-onmount/{One.html => One.svelte}  |  2 +-
 .../bindings-before-onmount/{Two.html => Two.svelte}  |  0
 .../runtime/samples/bindings-before-onmount/main.html |  7 -------
 .../samples/bindings-before-onmount/main.svelte       |  7 +++++++
 .../bindings-coalesced/{Foo.html => Foo.svelte}       |  0
 .../bindings-coalesced/{main.html => main.svelte}     |  2 +-
 .../samples/class-boolean/{main.html => main.svelte}  |  0
 .../samples/class-helper/{main.html => main.svelte}   |  0
 .../samples/class-in-each/{main.html => main.svelte}  |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/class-shortcut/{main.html => main.svelte} |  0
 .../class-with-attribute/{main.html => main.svelte}   |  0
 .../{main.html => main.svelte}                        |  0
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Bar.html => Bar.svelte}                          |  0
 .../{Baz.html => Baz.svelte}                          |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../{main.html => main.svelte}                        |  6 +++---
 .../{Bar.html => Bar.svelte}                          |  0
 .../{Baz.html => Baz.svelte}                          |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../{main.html => main.svelte}                        |  6 +++---
 ...omponentSelector.html => ComponentSelector.svelte} |  0
 .../{Editor.html => Editor.svelte}                    |  0
 .../{main.html => main.svelte}                        |  4 ++--
 .../{Widget.html => Widget.svelte}                    |  0
 .../component-binding-deep/{main.html => main.svelte} |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../component-binding-each/{main.html => main.svelte} |  2 +-
 .../{A.html => A.svelte}                              |  2 +-
 .../{B.html => B.svelte}                              |  2 +-
 .../{C.html => C.svelte}                              |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../component-binding-nested/{Bar.html => Bar.svelte} |  2 +-
 .../component-binding-nested/{Baz.html => Baz.svelte} |  0
 .../component-binding-nested/{Foo.html => Foo.svelte} |  2 +-
 .../{main.html => main.svelte}                        |  2 +-
 .../{Bar.html => Bar.svelte}                          |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../{main.html => main.svelte}                        |  4 ++--
 .../{Bar.html => Bar.svelte}                          |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../{main.html => main.svelte}                        |  4 ++--
 .../{Counter.html => Counter.svelte}                  |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Bar.html => Bar.svelte}                          |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../{main.html => main.svelte}                        |  4 ++--
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Counter.html => Counter.svelte}                  |  0
 .../component-binding/{main.html => main.svelte}      |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../component-data-dynamic/{main.html => main.svelte} |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 test/runtime/samples/component-data-empty/main.html   |  7 -------
 test/runtime/samples/component-data-empty/main.svelte |  7 +++++++
 .../{Link.html => Link.svelte}                        |  0
 .../main.html                                         |  5 -----
 .../main.svelte                                       |  5 +++++
 .../{Foo.html => Foo.svelte}                          |  0
 .../samples/component-data-static-boolean/main.html   |  5 -----
 .../samples/component-data-static-boolean/main.svelte |  5 +++++
 .../{Widget.html => Widget.svelte}                    |  0
 .../component-data-static/{main.html => main.svelte}  |  2 +-
 .../{Button.html => Button.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../samples/component-events-console/main.html        |  5 -----
 .../samples/component-events-console/main.svelte      |  5 +++++
 .../{Widget.html => Widget.svelte}                    |  0
 .../component-events-data/{main.html => main.svelte}  |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../component-events-each/{main.html => main.svelte}  |  2 +-
 .../component-events/{Widget.html => Widget.svelte}   |  0
 .../component-events/{main.html => main.svelte}       |  2 +-
 .../{Component.html => Component.svelte}              |  0
 .../component-if-placement/{main.html => main.svelte} |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../runtime/samples/component-nested-deep/Level1.html |  8 --------
 .../samples/component-nested-deep/Level1.svelte       |  8 ++++++++
 .../runtime/samples/component-nested-deep/Level2.html |  6 ------
 .../samples/component-nested-deep/Level2.svelte       |  6 ++++++
 .../{Level3.html => Level3.svelte}                    |  0
 test/runtime/samples/component-nested-deep/main.html  |  7 -------
 .../runtime/samples/component-nested-deep/main.svelte |  7 +++++++
 .../{Level1.html => Level1.svelte}                    |  4 ++--
 .../{Level2.html => Level2.svelte}                    |  0
 .../{Level3.html => Level3.svelte}                    |  0
 .../runtime/samples/component-nested-deeper/main.html |  7 -------
 .../samples/component-nested-deeper/main.svelte       |  7 +++++++
 .../component-not-void/{Link.html => Link.svelte}     |  0
 test/runtime/samples/component-not-void/main.html     |  5 -----
 test/runtime/samples/component-not-void/main.svelte   |  5 +++++
 .../component-ref/{Widget.html => Widget.svelte}      |  0
 .../samples/component-ref/{main.html => main.svelte}  |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../samples/component-shorthand-import/main.html      |  5 -----
 .../samples/component-shorthand-import/main.svelte    |  5 +++++
 .../{Nested.html => Nested.svelte}                    |  0
 test/runtime/samples/component-slot-default/main.html |  7 -------
 .../samples/component-slot-default/main.svelte        |  7 +++++++
 .../{Nested.html => Nested.svelte}                    |  0
 .../component-slot-dynamic/{main.html => main.svelte} |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 test/runtime/samples/component-slot-empty/main.html   |  6 ------
 test/runtime/samples/component-slot-empty/main.svelte |  6 ++++++
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../main.svelte}                                      |  6 +++---
 .../{Nested.html => Nested.svelte}                    |  0
 .../main.html => component-slot-if-block/main.svelte} |  6 +++---
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../component-slot-let-b/{main.html => main.svelte}   |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../component-slot-let-c/{main.html => main.svelte}   |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../component-slot-let/{Nested.html => Nested.svelte} |  0
 .../component-slot-let/{main.html => main.svelte}     |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../component-slot-named/{main.html => main.svelte}   |  2 +-
 .../{Inner.html => Inner.svelte}                      |  0
 .../{Outer.html => Outer.svelte}                      |  0
 .../samples/component-slot-nested-component/main.html |  8 --------
 .../component-slot-nested-component/main.svelte       |  8 ++++++++
 .../{Nested.html => Nested.svelte}                    |  0
 .../component-slot-nested/{main.html => main.svelte}  |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../component-slot-used-with-default-event/main.html  |  7 -------
 .../main.svelte                                       |  7 +++++++
 .../{Email.html => Email.svelte}                      |  0
 .../samples/component-static-at-symbol/main.html      |  5 -----
 .../samples/component-static-at-symbol/main.svelte    |  5 +++++
 .../{Widget.html => Widget.svelte}                    |  0
 .../component-template-inline-mutation/main.html      |  6 ------
 .../component-template-inline-mutation/main.svelte    |  6 ++++++
 .../{Foo.html => Foo.svelte}                          |  0
 .../samples/component-yield-follows-element/main.html |  5 -----
 .../component-yield-follows-element/main.svelte       |  5 +++++
 .../component-yield-if/{Widget.html => Widget.svelte} |  0
 .../component-yield-if/{main.html => main.svelte}     |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Inner.html => Inner.svelte}                      |  0
 .../{Outer.html => Outer.svelte}                      |  0
 .../samples/component-yield-nested-if/main.html       | 11 -----------
 .../samples/component-yield-nested-if/main.svelte     | 11 +++++++++++
 .../{Widget.html => Widget.svelte}                    |  0
 .../component-yield-parent/{main.html => main.svelte} |  2 +-
 .../{Modal.html => Modal.svelte}                      |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 test/runtime/samples/component-yield-static/main.html |  7 -------
 .../samples/component-yield-static/main.svelte        |  7 +++++++
 .../component-yield/{main.html => main.svelte}        |  0
 .../samples/component/{Widget.html => Widget.svelte}  |  0
 test/runtime/samples/component/main.html              |  7 -------
 test/runtime/samples/component/main.svelte            |  7 +++++++
 .../samples/context-api/{Tab.html => Tab.svelte}      |  2 +-
 .../context-api/{TabList.html => TabList.svelte}      |  0
 .../context-api/{TabPanel.html => TabPanel.svelte}    |  2 +-
 .../samples/context-api/{Tabs.html => Tabs.svelte}    |  0
 .../samples/context-api/{main.html => main.svelte}    |  8 ++++----
 .../samples/css-comments/{main.html => main.svelte}   |  0
 .../samples/css-false/{Widget.html => Widget.svelte}  |  0
 test/runtime/samples/css-false/main.html              |  6 ------
 test/runtime/samples/css-false/main.svelte            |  6 ++++++
 .../{Widget.html => Widget.svelte}                    |  0
 .../css-space-in-attribute/{main.html => main.svelte} |  2 +-
 .../samples/css/{Widget.html => Widget.svelte}        |  0
 test/runtime/samples/css/main.html                    |  6 ------
 test/runtime/samples/css/main.svelte                  |  6 ++++++
 .../samples/custom-method/{main.html => main.svelte}  |  0
 .../deconflict-builtins/{main.html => main.svelte}    |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../deconflict-contexts/{main.html => main.svelte}    |  0
 .../{main.html => main.svelte}                        |  0
 .../deconflict-non-helpers/{main.html => main.svelte} |  0
 test/runtime/samples/deconflict-self/main.html        |  5 -----
 test/runtime/samples/deconflict-self/main.svelte      |  5 +++++
 .../deconflict-self/nested/{main.html => main.svelte} |  0
 .../deconflict-template-1/{main.html => main.svelte}  |  0
 .../deconflict-template-2/{main.html => main.svelte}  |  0
 .../deconflict-vars/{main.html => main.svelte}        |  0
 .../default-data-function/{main.html => main.svelte}  |  0
 .../default-data-override/{main.html => main.svelte}  |  0
 .../samples/default-data/{main.html => main.svelte}   |  0
 .../samples/destroy-twice/{main.html => main.svelte}  |  0
 .../samples/destructuring/{main.html => main.svelte}  |  0
 .../{main.html => main.svelte}                        |  0
 .../dev-warning-helper/{main.html => main.svelte}     |  0
 .../{main.html => main.svelte}                        |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../dev-warning-missing-data-component/main.html      |  5 -----
 .../dev-warning-missing-data-component/main.svelte    |  5 +++++
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/document-event/{main.html => main.svelte} |  0
 .../{Green.html => Green.svelte}                      |  0
 .../{Red.html => Red.svelte}                          |  0
 .../dynamic-component-bindings-recreated-b/main.html  | 10 ----------
 .../main.svelte                                       | 10 ++++++++++
 .../{Green.html => Green.svelte}                      |  0
 .../{Red.html => Red.svelte}                          |  0
 .../dynamic-component-bindings-recreated/main.html    |  9 ---------
 .../dynamic-component-bindings-recreated/main.svelte  |  9 +++++++++
 .../{Bar.html => Bar.svelte}                          |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../samples/dynamic-component-bindings/main.html      | 10 ----------
 .../samples/dynamic-component-bindings/main.svelte    | 10 ++++++++++
 .../{main.html => main.svelte}                        |  0
 .../dynamic-component-events/{Bar.html => Bar.svelte} |  0
 .../dynamic-component-events/{Foo.html => Foo.svelte} |  0
 .../{main.html => main.svelte}                        |  4 ++--
 .../dynamic-component-in-if/{Bar.html => Bar.svelte}  |  0
 .../dynamic-component-in-if/{Foo.html => Foo.svelte}  |  0
 .../{main.html => main.svelte}                        |  4 ++--
 .../{Bar.html => Bar.svelte}                          |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../{main.html => main.svelte}                        |  4 ++--
 .../{Foo.html => Foo.svelte}                          |  0
 .../samples/dynamic-component-nulled-out/main.html    |  7 -------
 .../samples/dynamic-component-nulled-out/main.svelte  |  7 +++++++
 .../dynamic-component-ref/{Foo.html => Foo.svelte}    |  0
 .../dynamic-component-ref/{main.html => main.svelte}  |  2 +-
 .../dynamic-component-slot/{Bar.html => Bar.svelte}   |  0
 .../dynamic-component-slot/{Baz.html => Baz.svelte}   |  0
 .../dynamic-component-slot/{Foo.html => Foo.svelte}   |  0
 .../dynamic-component-slot/{main.html => main.svelte} |  6 +++---
 .../{Bar.html => Bar.svelte}                          |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../main.html                                         |  8 --------
 .../main.svelte                                       |  8 ++++++++
 .../dynamic-component/{Bar.html => Bar.svelte}        |  0
 .../dynamic-component/{Foo.html => Foo.svelte}        |  0
 test/runtime/samples/dynamic-component/main.html      |  8 --------
 test/runtime/samples/dynamic-component/main.svelte    |  8 ++++++++
 .../{main.html => main.svelte}                        |  0
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{main.html => main.svelte}                        |  0
 .../each-block-else/{main.html => main.svelte}        |  0
 .../{Thing.html => Thing.svelte}                      |  0
 .../each-block-empty-outro/{main.html => main.svelte} |  2 +-
 .../each-block-function/{main.html => main.svelte}    |  0
 .../each-block-in-if-block/{main.html => main.svelte} |  0
 .../each-block-index-only/{main.html => main.svelte}  |  0
 .../each-block-indexed/{main.html => main.svelte}     |  0
 .../{main.html => main.svelte}                        |  0
 .../each-block-keyed-empty/{main.html => main.svelte} |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{Nested.html => Nested.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../each-block-keyed/{main.html => main.svelte}       |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../each-block-static/{main.html => main.svelte}      |  0
 .../each-block-text-node/{main.html => main.svelte}   |  0
 .../samples/each-block/{main.html => main.svelte}     |  0
 .../each-blocks-expression/{main.html => main.svelte} |  0
 .../each-blocks-nested-b/{main.html => main.svelte}   |  0
 .../each-blocks-nested/{main.html => main.svelte}     |  0
 .../element-invalid-name/{main.html => main.svelte}   |  0
 .../element-source-location/{Foo.html => Foo.svelte}  |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../empty-style-block/{main.html => main.svelte}      |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../samples/escaped-text/{main.html => main.svelte}   |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../event-handler-each/{main.html => main.svelte}     |  0
 .../{main.html => main.svelte}                        |  0
 .../event-handler-hoisted/{main.html => main.svelte}  |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../event-handler-removal/{main.html => main.svelte}  |  0
 .../event-handler-sanitize/{main.html => main.svelte} |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../event-handler-shorthand-component/main.html       |  5 -----
 .../event-handler-shorthand-component/main.svelte     |  5 +++++
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{main.html => main.svelte}                        |  0
 .../samples/event-handler/{main.html => main.svelte}  |  0
 .../{Nested.html => Nested.svelte}                    |  2 +-
 .../{Visibility.html => Visibility.svelte}            |  0
 .../flush-before-bindings/{main.html => main.svelte}  |  2 +-
 .../function-in-expression/{main.html => main.svelte} |  0
 .../get-after-destroy/{main.html => main.svelte}      |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../hash-in-attribute/{main.html => main.svelte}      |  0
 .../samples/head-if-block/{main.html => main.svelte}  |  0
 .../{main.html => main.svelte}                        |  0
 .../head-title-dynamic/{main.html => main.svelte}     |  0
 .../head-title-static/{main.html => main.svelte}      |  0
 .../samples/hello-world/{main.html => main.svelte}    |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/helpers/{main.html => main.svelte}        |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/html-entities/{main.html => main.svelte}  |  0
 .../{main.html => main.svelte}                        |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../if-block-else-in-each/{main.html => main.svelte}  |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../samples/if-block-else/{main.html => main.svelte}  |  0
 .../{main.html => main.svelte}                        |  0
 .../if-block-elseif-text/{main.html => main.svelte}   |  0
 .../if-block-elseif/{main.html => main.svelte}        |  0
 .../if-block-expression/{main.html => main.svelte}    |  0
 .../samples/if-block-first/{main.html => main.svelte} |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../samples/if-block-or/{main.html => main.svelte}    |  0
 .../{Component.html => Component.svelte}              |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Component.html => Component.svelte}              |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../if-block-widget/{Widget.html => Widget.svelte}    |  0
 .../if-block-widget/{main.html => main.svelte}        |  2 +-
 .../samples/if-block/{main.html => main.svelte}       |  0
 .../if-in-keyed-each/{main.html => main.svelte}       |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../ignore-unchanged-raw/{main.html => main.svelte}   |  0
 .../ignore-unchanged-tag/{main.html => main.svelte}   |  0
 .../immutable-nested/{Nested.html => Nested.svelte}   |  0
 .../immutable-nested/{main.html => main.svelte}       |  2 +-
 .../immutable-option/{main.html => main.svelte}       |  0
 .../{main.html => main.svelte}                        |  0
 .../immutable-svelte-meta/{main.html => main.svelte}  |  0
 .../{ComponentOne.html => ComponentOne.svelte}        |  0
 .../{ComponentTwo.html => ComponentTwo.svelte}        |  0
 .../{main.html => main.svelte}                        |  4 ++--
 .../initial-state-assign/{main.html => main.svelte}   |  0
 .../inline-expressions/{main.html => main.svelte}     |  0
 .../samples/input-list/{main.html => main.svelte}     |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/internal-state/{Foo.html => Foo.svelte}   |  0
 test/runtime/samples/internal-state/main.html         |  9 ---------
 test/runtime/samples/internal-state/main.svelte       |  9 +++++++++
 .../lifecycle-events/{main.html => main.svelte}       |  0
 .../lifecycle-next-tick/{main.html => main.svelte}    |  0
 .../lifecycle-render-order/{main.html => main.svelte} |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/module-context/{main.html => main.svelte} |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../names-deconflicted/{Widget.html => Widget.svelte} |  0
 .../names-deconflicted/{main.html => main.svelte}     |  2 +-
 test/runtime/samples/nbsp/{main.html => main.svelte}  |  0
 .../{main.html => main.svelte}                        |  0
 .../{Folder.html => Folder.svelte}                    |  0
 .../nested-transition-detach-if-false/main.html       |  7 -------
 .../nested-transition-detach-if-false/main.svelte     |  7 +++++++
 .../{Span.html => Span.svelte}                        |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../noscript-removal/{main.html => main.svelte}       |  0
 .../ondestroy-before-cleanup/{Top.html => Top.svelte} |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../samples/onmount-async/{main.html => main.svelte}  |  0
 .../{ParentWidget.html => ParentWidget.svelte}        |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../samples/onmount-fires-when-ready-nested/main.html |  9 ---------
 .../onmount-fires-when-ready-nested/main.svelte       |  9 +++++++++
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 test/runtime/samples/onmount-sibling-order/main.html  |  6 ------
 .../runtime/samples/onmount-sibling-order/main.svelte |  6 ++++++
 .../option-without-select/{main.html => main.svelte}  |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/preload/{main.html => main.svelte}        |  0
 .../prop-not-action/{Nested.html => Nested.svelte}    |  0
 test/runtime/samples/prop-not-action/main.html        |  6 ------
 test/runtime/samples/prop-not-action/main.svelte      |  6 ++++++
 .../{main.html => main.svelte}                        |  0
 .../prop-without-semicolon/{main.html => main.svelte} |  0
 .../raw-anchor-first-child/{main.html => main.svelte} |  0
 .../{main.html => main.svelte}                        |  0
 .../raw-anchor-last-child/{main.html => main.svelte}  |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/raw-mustaches/{main.html => main.svelte}  |  0
 .../reactive-function/{main.html => main.svelte}      |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../reactive-values/{main.html => main.svelte}        |  0
 .../{main.html => main.svelte}                        |  0
 .../select-bind-array/{main.html => main.svelte}      |  0
 .../select-bind-in-array/{main.html => main.svelte}   |  0
 .../select-change-handler/{main.html => main.svelte}  |  0
 .../select-no-whitespace/{main.html => main.svelte}   |  0
 .../{main.html => main.svelte}                        |  0
 .../select-one-way-bind/{main.html => main.svelte}    |  0
 .../samples/select-props/{main.html => main.svelte}   |  0
 .../runtime/samples/select/{main.html => main.svelte} |  0
 .../self-reference-tree/{main.html => main.svelte}    |  0
 .../samples/self-reference/{main.html => main.svelte} |  0
 .../set-after-destroy/{main.html => main.svelte}      |  0
 .../set-in-oncreate/{main.html => main.svelte}        |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../samples/set-in-onstate/{main.html => main.svelte} |  0
 .../set-null-text-node/{main.html => main.svelte}     |  0
 .../set-prevents-loop/{Foo.html => Foo.svelte}        |  0
 .../set-prevents-loop/{main.html => main.svelte}      |  2 +-
 .../set-undefined-attr/{main.html => main.svelte}     |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../samples/sigil-static-#/{main.html => main.svelte} |  0
 .../samples/sigil-static-@/{main.html => main.svelte} |  0
 .../single-static-element/{main.html => main.svelte}  |  0
 .../single-text-node/{main.html => main.svelte}       |  0
 .../slot-in-custom-element/{main.html => main.svelte} |  0
 .../{main.html => main.svelte}                        |  0
 .../spread-component-dynamic/{Foo.html => Foo.svelte} |  0
 .../samples/spread-component-dynamic/main.html        |  7 -------
 .../samples/spread-component-dynamic/main.svelte      |  7 +++++++
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../samples/spread-component-with-bind/main.html      |  8 --------
 .../samples/spread-component-with-bind/main.svelte    |  8 ++++++++
 .../spread-component/{Widget.html => Widget.svelte}   |  0
 .../spread-component/{main.html => main.svelte}       |  2 +-
 .../{Nested.html => Nested.svelte}                    |  0
 .../spread-each-component/{main.html => main.svelte}  |  2 +-
 .../spread-each-element/{main.html => main.svelte}    |  0
 .../spread-element-boolean/{main.html => main.svelte} |  0
 .../spread-element-input/{main.html => main.svelte}   |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/spread-element/{main.html => main.svelte} |  0
 .../spread-own-props/{Widget.html => Widget.svelte}   |  0
 .../spread-own-props/{main.html => main.svelte}       |  2 +-
 .../state-deconflicted/{main.html => main.svelte}     |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../store-auto-subscribe/{main.html => main.svelte}   |  0
 .../store-dev-mode-error/{main.html => main.svelte}   |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/svg-attributes/{main.html => main.svelte} |  0
 .../{Rect.html => Rect.svelte}                        |  0
 .../main.svelte}                                      |  2 +-
 .../{Rect.html => Rect.svelte}                        |  0
 .../main.svelte}                                      |  2 +-
 .../samples/svg-class/{main.html => main.svelte}      |  0
 .../svg-each-block-anchor/{main.html => main.svelte}  |  0
 .../{main.html => main.svelte}                        |  0
 .../samples/svg-multiple/{main.html => main.svelte}   |  0
 .../svg-no-whitespace/{main.html => main.svelte}      |  0
 .../samples/svg-with-style/{main.html => main.svelte} |  0
 .../samples/svg-xlink/{main.html => main.svelte}      |  0
 .../samples/svg-xmlns/{main.html => main.svelte}      |  0
 test/runtime/samples/svg/{main.html => main.svelte}   |  0
 .../samples/template/{main.html => main.svelte}       |  0
 .../textarea-children/{main.html => main.svelte}      |  0
 .../samples/textarea-value/{main.html => main.svelte} |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../transition-js-args/{main.html => main.svelte}     |  0
 .../{main.html => main.svelte}                        |  0
 .../transition-js-context/{main.html => main.svelte}  |  0
 .../transition-js-deferred/{main.html => main.svelte} |  0
 .../{main.html => main.svelte}                        |  0
 .../transition-js-delay/{main.html => main.svelte}    |  0
 .../{main.html => main.svelte}                        |  0
 .../{A.html => A.svelte}                              |  0
 .../{B.html => B.svelte}                              |  0
 .../samples/transition-js-dynamic-component/main.html |  8 --------
 .../transition-js-dynamic-component/main.svelte       |  8 ++++++++
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../transition-js-events/{main.html => main.svelte}   |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../transition-js-initial/{main.html => main.svelte}  |  0
 .../{main.html => main.svelte}                        |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../main.html                                         |  5 -----
 .../main.svelte                                       |  5 +++++
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../transition-js-local/{main.html => main.svelte}    |  0
 .../{main.html => main.svelte}                        |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{main.html => main.svelte}                        |  0
 .../{Widget.html => Widget.svelte}                    |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../{Child.html => Child.svelte}                      |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../whitespace-each-block/{main.html => main.svelte}  |  0
 .../whitespace-list/{main.html => main.svelte}        |  0
 .../whitespace-normal/{main.html => main.svelte}      |  0
 .../{main.html => main.svelte}                        |  0
 .../{main.html => main.svelte}                        |  0
 .../window-binding-resize/{main.html => main.svelte}  |  0
 .../window-event-context/{main.html => main.svelte}   |  0
 .../window-event-custom/{main.html => main.svelte}    |  0
 .../samples/window-event/{main.html => main.svelte}   |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../attribute-boolean/{main.html => main.svelte}      |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../attribute-dynamic/{main.html => main.svelte}      |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../{main.html => main.svelte}                        |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../{main.html => main.svelte}                        |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../attribute-static/{main.html => main.svelte}       |  0
 .../bindings/{_expected.html => _expected.svelte}     |  0
 .../samples/bindings/{main.html => main.svelte}       |  0
 .../comment/{_expected.html => _expected.svelte}      |  0
 .../samples/comment/{main.html => main.svelte}        |  0
 .../{Foo.html => Foo.svelte}                          |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../component-binding/{Foo.html => Foo.svelte}        |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../component-binding/{main.html => main.svelte}      |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../component-data-dynamic/{main.html => main.svelte} |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../component-data-empty/{main.html => main.svelte}   |  2 +-
 .../{Widget.html => Widget.svelte}                    |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../{main.html => main.svelte}                        |  2 +-
 .../component-refs/{Widget.html => Widget.svelte}     |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../samples/component-refs/{main.html => main.svelte} |  2 +-
 .../{_expected.html => _expected.svelte}              |  0
 .../component-yield/{Widget.html => Widget.svelte}    |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../component-yield/{main.html => main.svelte}        |  2 +-
 .../samples/component/{Widget.html => Widget.svelte}  |  0
 .../component/{_expected.html => _expected.svelte}    |  0
 .../samples/component/{main.html => main.svelte}      |  2 +-
 .../computed/{_expected.html => _expected.svelte}     |  0
 .../samples/computed/{main.html => main.svelte}       |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../default-data-override/{main.html => main.svelte}  |  0
 .../default-data/{_expected.html => _expected.svelte} |  0
 .../samples/default-data/{main.html => main.svelte}   |  0
 .../directives/{_expected.html => _expected.svelte}   |  0
 .../samples/directives/{main.html => main.svelte}     |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../dynamic-text-escaped/{main.html => main.svelte}   |  0
 .../dynamic-text/{_expected.html => _expected.svelte} |  0
 .../samples/dynamic-text/{main.html => main.svelte}   |  0
 .../each-block/{_expected.html => _expected.svelte}   |  0
 .../samples/each-block/{main.html => main.svelte}     |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../empty-elements-closed/{main.html => main.svelte}  |  0
 .../entities/{_expected.html => _expected.svelte}     |  0
 .../samples/entities/{main.html => main.svelte}       |  0
 .../samples/head-title/_expected-head.html            |  1 -
 .../{_actual-head.html => _expected-head.svelte}      |  0
 .../head-title/{_expected.html => _expected.svelte}   |  0
 .../samples/head-title/{main.html => main.svelte}     |  0
 .../helpers/{_expected.html => _expected.svelte}      |  0
 .../samples/helpers/{main.html => main.svelte}        |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../samples/if-block-false/{main.html => main.svelte} |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../samples/if-block-true/{main.html => main.svelte}  |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../import-non-component/{main.html => main.svelte}   |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../samples/raw-mustaches/{main.html => main.svelte}  |  0
 .../sanitize-name/{[foo].html => [foo].svelte}        |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../samples/sanitize-name/main.html                   |  5 -----
 .../samples/sanitize-name/main.svelte                 |  5 +++++
 .../static-div/{_expected.html => _expected.svelte}   |  0
 .../samples/static-div/{main.html => main.svelte}     |  0
 .../static-text/{_expected.html => _expected.svelte}  |  0
 .../samples/static-text/{main.html => main.svelte}    |  0
 .../samples/styles-nested/{One.html => One.svelte}    |  2 +-
 .../samples/styles-nested/{Two.html => Two.svelte}    |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../samples/styles-nested/{main.html => main.svelte}  |  2 +-
 .../styles/{_expected.html => _expected.svelte}       |  0
 .../samples/styles/{main.html => main.svelte}         |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../textarea-children/{main.html => main.svelte}      |  0
 .../{_expected.html => _expected.svelte}              |  0
 .../samples/textarea-value/{main.html => main.svelte} |  0
 .../triple/{_expected.html => _expected.svelte}       |  0
 .../samples/triple/{main.html => main.svelte}         |  0
 .../samples/basic/{input.html => input.svelte}        |  0
 .../{input.html => input.svelte}                      |  0
 .../samples/binding/{input.html => input.svelte}      |  0
 .../samples/css/{input.html => input.svelte}          |  0
 .../samples/each-block/{input.html => input.svelte}   |  0
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 rename test/cli/samples/basic/src/{Main.html => Main.svelte} (100%)
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 delete mode 100644 test/cli/samples/dir-subdir/src/Main.html
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 rename test/css/samples/attribute-selector-only-name/{input.html => input.svelte} (100%)
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diff --git a/test/cli/samples/basic/src/Main.html b/test/cli/samples/basic/src/Main.svelte
similarity index 100%
rename from test/cli/samples/basic/src/Main.html
rename to test/cli/samples/basic/src/Main.svelte
diff --git a/test/cli/samples/custom-element/src/Main.html b/test/cli/samples/custom-element/src/Main.svelte
similarity index 100%
rename from test/cli/samples/custom-element/src/Main.html
rename to test/cli/samples/custom-element/src/Main.svelte
diff --git a/test/cli/samples/dev/src/Main.html b/test/cli/samples/dev/src/Main.svelte
similarity index 100%
rename from test/cli/samples/dev/src/Main.html
rename to test/cli/samples/dev/src/Main.svelte
diff --git a/test/cli/samples/dir-sourcemap/src/Main.html b/test/cli/samples/dir-sourcemap/src/Main.html
deleted file mode 100644
index cbcde3f1ed..0000000000
--- a/test/cli/samples/dir-sourcemap/src/Main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-</script>
-
-<Widget/>
\ No newline at end of file
diff --git a/test/cli/samples/dir-sourcemap/src/Main.svelte b/test/cli/samples/dir-sourcemap/src/Main.svelte
new file mode 100644
index 0000000000..0a9d5bba87
--- /dev/null
+++ b/test/cli/samples/dir-sourcemap/src/Main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Widget from './Widget.svelte';
+</script>
+
+<Widget/>
\ No newline at end of file
diff --git a/test/cli/samples/dir-sourcemap/src/Widget.html b/test/cli/samples/dir-sourcemap/src/Widget.svelte
similarity index 100%
rename from test/cli/samples/dir-sourcemap/src/Widget.html
rename to test/cli/samples/dir-sourcemap/src/Widget.svelte
diff --git a/test/cli/samples/dir-subdir/src/Main.html b/test/cli/samples/dir-subdir/src/Main.html
deleted file mode 100644
index 89391562d5..0000000000
--- a/test/cli/samples/dir-subdir/src/Main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Widget from './widget/Widget.html';
-</script>
-
-<Widget/>
\ No newline at end of file
diff --git a/test/cli/samples/dir-subdir/src/Main.svelte b/test/cli/samples/dir-subdir/src/Main.svelte
new file mode 100644
index 0000000000..ac663b4338
--- /dev/null
+++ b/test/cli/samples/dir-subdir/src/Main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Widget from './widget/Widget.svelte';
+</script>
+
+<Widget/>
\ No newline at end of file
diff --git a/test/cli/samples/dir-subdir/src/widget/Widget.html b/test/cli/samples/dir-subdir/src/widget/Widget.svelte
similarity index 100%
rename from test/cli/samples/dir-subdir/src/widget/Widget.html
rename to test/cli/samples/dir-subdir/src/widget/Widget.svelte
diff --git a/test/cli/samples/dir/src/Main.html b/test/cli/samples/dir/src/Main.html
deleted file mode 100644
index cbcde3f1ed..0000000000
--- a/test/cli/samples/dir/src/Main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-</script>
-
-<Widget/>
\ No newline at end of file
diff --git a/test/cli/samples/dir/src/Main.svelte b/test/cli/samples/dir/src/Main.svelte
new file mode 100644
index 0000000000..0a9d5bba87
--- /dev/null
+++ b/test/cli/samples/dir/src/Main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Widget from './Widget.svelte';
+</script>
+
+<Widget/>
\ No newline at end of file
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rename to test/css/samples/unused-selector-leading/expected.svelte
diff --git a/test/css/samples/unused-selector-leading/input.html b/test/css/samples/unused-selector-leading/input.svelte
similarity index 100%
rename from test/css/samples/unused-selector-leading/input.html
rename to test/css/samples/unused-selector-leading/input.svelte
diff --git a/test/css/samples/unused-selector-ternary/expected.html b/test/css/samples/unused-selector-ternary/expected.svelte
similarity index 100%
rename from test/css/samples/unused-selector-ternary/expected.html
rename to test/css/samples/unused-selector-ternary/expected.svelte
diff --git a/test/css/samples/unused-selector-ternary/input.html b/test/css/samples/unused-selector-ternary/input.svelte
similarity index 100%
rename from test/css/samples/unused-selector-ternary/input.html
rename to test/css/samples/unused-selector-ternary/input.svelte
diff --git a/test/css/samples/unused-selector/expected.html b/test/css/samples/unused-selector/expected.svelte
similarity index 100%
rename from test/css/samples/unused-selector/expected.html
rename to test/css/samples/unused-selector/expected.svelte
diff --git a/test/css/samples/unused-selector/input.html b/test/css/samples/unused-selector/input.svelte
similarity index 100%
rename from test/css/samples/unused-selector/input.html
rename to test/css/samples/unused-selector/input.svelte
diff --git a/test/custom-elements/samples/custom-method/main.html b/test/custom-elements/samples/custom-method/main.svelte
similarity index 100%
rename from test/custom-elements/samples/custom-method/main.html
rename to test/custom-elements/samples/custom-method/main.svelte
diff --git a/test/custom-elements/samples/escaped-css/main.html b/test/custom-elements/samples/escaped-css/main.svelte
similarity index 100%
rename from test/custom-elements/samples/escaped-css/main.html
rename to test/custom-elements/samples/escaped-css/main.svelte
diff --git a/test/custom-elements/samples/html-slots/main.html b/test/custom-elements/samples/html-slots/main.svelte
similarity index 100%
rename from test/custom-elements/samples/html-slots/main.html
rename to test/custom-elements/samples/html-slots/main.svelte
diff --git a/test/custom-elements/samples/html/main.html b/test/custom-elements/samples/html/main.svelte
similarity index 100%
rename from test/custom-elements/samples/html/main.html
rename to test/custom-elements/samples/html/main.svelte
diff --git a/test/custom-elements/samples/nested.skip/Counter.html b/test/custom-elements/samples/nested.skip/Counter.svelte
similarity index 100%
rename from test/custom-elements/samples/nested.skip/Counter.html
rename to test/custom-elements/samples/nested.skip/Counter.svelte
diff --git a/test/custom-elements/samples/nested.skip/main.html b/test/custom-elements/samples/nested.skip/main.svelte
similarity index 75%
rename from test/custom-elements/samples/nested.skip/main.html
rename to test/custom-elements/samples/nested.skip/main.svelte
index 90459c83eb..cb26008061 100644
--- a/test/custom-elements/samples/nested.skip/main.html
+++ b/test/custom-elements/samples/nested.skip/main.svelte
@@ -1,7 +1,7 @@
 <svelte:options tag="my-app"/>
 
 <script>
-	import Counter from './Counter.html';
+	import Counter from './Counter.svelte';
 
 	export let count;
 </script>
diff --git a/test/custom-elements/samples/new-styled/main.html b/test/custom-elements/samples/new-styled/main.svelte
similarity index 100%
rename from test/custom-elements/samples/new-styled/main.html
rename to test/custom-elements/samples/new-styled/main.svelte
diff --git a/test/custom-elements/samples/new/main.html b/test/custom-elements/samples/new/main.svelte
similarity index 100%
rename from test/custom-elements/samples/new/main.html
rename to test/custom-elements/samples/new/main.svelte
diff --git a/test/custom-elements/samples/no-missing-prop-warnings/main.html b/test/custom-elements/samples/no-missing-prop-warnings/main.svelte
similarity index 100%
rename from test/custom-elements/samples/no-missing-prop-warnings/main.html
rename to test/custom-elements/samples/no-missing-prop-warnings/main.svelte
diff --git a/test/custom-elements/samples/oncreate/main.html b/test/custom-elements/samples/oncreate/main.svelte
similarity index 100%
rename from test/custom-elements/samples/oncreate/main.html
rename to test/custom-elements/samples/oncreate/main.svelte
diff --git a/test/custom-elements/samples/props/main.html b/test/custom-elements/samples/props/main.svelte
similarity index 81%
rename from test/custom-elements/samples/props/main.html
rename to test/custom-elements/samples/props/main.svelte
index b36c7f3e3d..80b483bf6e 100644
--- a/test/custom-elements/samples/props/main.html
+++ b/test/custom-elements/samples/props/main.svelte
@@ -1,7 +1,7 @@
 <svelte:options tag="custom-element"/>
 
 <script>
-	import './my-widget.html';
+	import './my-widget.svelte';
 
 	export let items = ['a', 'b', 'c'];
 </script>
diff --git a/test/custom-elements/samples/props/my-widget.html b/test/custom-elements/samples/props/my-widget.svelte
similarity index 100%
rename from test/custom-elements/samples/props/my-widget.html
rename to test/custom-elements/samples/props/my-widget.svelte
diff --git a/test/hydration/samples/basic/_after.html b/test/hydration/samples/basic/_after.svelte
similarity index 100%
rename from test/hydration/samples/basic/_after.html
rename to test/hydration/samples/basic/_after.svelte
diff --git a/test/hydration/samples/basic/_before.html b/test/hydration/samples/basic/_before.svelte
similarity index 100%
rename from test/hydration/samples/basic/_before.html
rename to test/hydration/samples/basic/_before.svelte
diff --git a/test/hydration/samples/basic/main.html b/test/hydration/samples/basic/main.svelte
similarity index 100%
rename from test/hydration/samples/basic/main.html
rename to test/hydration/samples/basic/main.svelte
diff --git a/test/hydration/samples/binding-input/_after.html b/test/hydration/samples/binding-input/_after.svelte
similarity index 100%
rename from test/hydration/samples/binding-input/_after.html
rename to test/hydration/samples/binding-input/_after.svelte
diff --git a/test/hydration/samples/binding-input/_before.html b/test/hydration/samples/binding-input/_before.svelte
similarity index 100%
rename from test/hydration/samples/binding-input/_before.html
rename to test/hydration/samples/binding-input/_before.svelte
diff --git a/test/hydration/samples/binding-input/main.html b/test/hydration/samples/binding-input/main.svelte
similarity index 100%
rename from test/hydration/samples/binding-input/main.html
rename to test/hydration/samples/binding-input/main.svelte
diff --git a/test/hydration/samples/component-in-element/Nested.html b/test/hydration/samples/component-in-element/Nested.svelte
similarity index 100%
rename from test/hydration/samples/component-in-element/Nested.html
rename to test/hydration/samples/component-in-element/Nested.svelte
diff --git a/test/hydration/samples/component-in-element/_after.html b/test/hydration/samples/component-in-element/_after.svelte
similarity index 100%
rename from test/hydration/samples/component-in-element/_after.html
rename to test/hydration/samples/component-in-element/_after.svelte
diff --git a/test/hydration/samples/component-in-element/_before.html b/test/hydration/samples/component-in-element/_before.svelte
similarity index 100%
rename from test/hydration/samples/component-in-element/_before.html
rename to test/hydration/samples/component-in-element/_before.svelte
diff --git a/test/hydration/samples/component-in-element/main.html b/test/hydration/samples/component-in-element/main.html
deleted file mode 100644
index 4367a831ea..0000000000
--- a/test/hydration/samples/component-in-element/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Nested from './Nested.html';
-</script>
-
-<div>
-	<Nested/>
-</div>
\ No newline at end of file
diff --git a/test/hydration/samples/component-in-element/main.svelte b/test/hydration/samples/component-in-element/main.svelte
new file mode 100644
index 0000000000..f1d903fcd6
--- /dev/null
+++ b/test/hydration/samples/component-in-element/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Nested from './Nested.svelte';
+</script>
+
+<div>
+	<Nested/>
+</div>
\ No newline at end of file
diff --git a/test/hydration/samples/component/Nested.html b/test/hydration/samples/component/Nested.svelte
similarity index 100%
rename from test/hydration/samples/component/Nested.html
rename to test/hydration/samples/component/Nested.svelte
diff --git a/test/hydration/samples/component/_after.html b/test/hydration/samples/component/_after.svelte
similarity index 100%
rename from test/hydration/samples/component/_after.html
rename to test/hydration/samples/component/_after.svelte
diff --git a/test/hydration/samples/component/_before.html b/test/hydration/samples/component/_before.svelte
similarity index 100%
rename from test/hydration/samples/component/_before.html
rename to test/hydration/samples/component/_before.svelte
diff --git a/test/hydration/samples/component/main.html b/test/hydration/samples/component/main.html
deleted file mode 100644
index 583835f46a..0000000000
--- a/test/hydration/samples/component/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Nested from './Nested.html';
-</script>
-
-<Nested/>
\ No newline at end of file
diff --git a/test/hydration/samples/component/main.svelte b/test/hydration/samples/component/main.svelte
new file mode 100644
index 0000000000..469c37f719
--- /dev/null
+++ b/test/hydration/samples/component/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Nested from './Nested.svelte';
+</script>
+
+<Nested/>
\ No newline at end of file
diff --git a/test/hydration/samples/dynamic-text-changed/_after.html b/test/hydration/samples/dynamic-text-changed/_after.svelte
similarity index 100%
rename from test/hydration/samples/dynamic-text-changed/_after.html
rename to test/hydration/samples/dynamic-text-changed/_after.svelte
diff --git a/test/hydration/samples/dynamic-text-changed/_before.html b/test/hydration/samples/dynamic-text-changed/_before.svelte
similarity index 100%
rename from test/hydration/samples/dynamic-text-changed/_before.html
rename to test/hydration/samples/dynamic-text-changed/_before.svelte
diff --git a/test/hydration/samples/dynamic-text-changed/main.html b/test/hydration/samples/dynamic-text-changed/main.svelte
similarity index 100%
rename from test/hydration/samples/dynamic-text-changed/main.html
rename to test/hydration/samples/dynamic-text-changed/main.svelte
diff --git a/test/hydration/samples/dynamic-text/_after.html b/test/hydration/samples/dynamic-text/_after.svelte
similarity index 100%
rename from test/hydration/samples/dynamic-text/_after.html
rename to test/hydration/samples/dynamic-text/_after.svelte
diff --git a/test/hydration/samples/dynamic-text/_before.html b/test/hydration/samples/dynamic-text/_before.svelte
similarity index 100%
rename from test/hydration/samples/dynamic-text/_before.html
rename to test/hydration/samples/dynamic-text/_before.svelte
diff --git a/test/hydration/samples/dynamic-text/main.html b/test/hydration/samples/dynamic-text/main.svelte
similarity index 100%
rename from test/hydration/samples/dynamic-text/main.html
rename to test/hydration/samples/dynamic-text/main.svelte
diff --git a/test/hydration/samples/each-block-arg-clash/_after.html b/test/hydration/samples/each-block-arg-clash/_after.svelte
similarity index 100%
rename from test/hydration/samples/each-block-arg-clash/_after.html
rename to test/hydration/samples/each-block-arg-clash/_after.svelte
diff --git a/test/hydration/samples/each-block-arg-clash/_before.html b/test/hydration/samples/each-block-arg-clash/_before.svelte
similarity index 100%
rename from test/hydration/samples/each-block-arg-clash/_before.html
rename to test/hydration/samples/each-block-arg-clash/_before.svelte
diff --git a/test/hydration/samples/each-block-arg-clash/main.html b/test/hydration/samples/each-block-arg-clash/main.svelte
similarity index 100%
rename from test/hydration/samples/each-block-arg-clash/main.html
rename to test/hydration/samples/each-block-arg-clash/main.svelte
diff --git a/test/hydration/samples/each-block/_after.html b/test/hydration/samples/each-block/_after.svelte
similarity index 100%
rename from test/hydration/samples/each-block/_after.html
rename to test/hydration/samples/each-block/_after.svelte
diff --git a/test/hydration/samples/each-block/_before.html b/test/hydration/samples/each-block/_before.svelte
similarity index 100%
rename from test/hydration/samples/each-block/_before.html
rename to test/hydration/samples/each-block/_before.svelte
diff --git a/test/hydration/samples/each-block/main.html b/test/hydration/samples/each-block/main.svelte
similarity index 100%
rename from test/hydration/samples/each-block/main.html
rename to test/hydration/samples/each-block/main.svelte
diff --git a/test/hydration/samples/element-attribute-added/_after.html b/test/hydration/samples/element-attribute-added/_after.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-added/_after.html
rename to test/hydration/samples/element-attribute-added/_after.svelte
diff --git a/test/hydration/samples/element-attribute-added/_before.html b/test/hydration/samples/element-attribute-added/_before.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-added/_before.html
rename to test/hydration/samples/element-attribute-added/_before.svelte
diff --git a/test/hydration/samples/element-attribute-added/main.html b/test/hydration/samples/element-attribute-added/main.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-added/main.html
rename to test/hydration/samples/element-attribute-added/main.svelte
diff --git a/test/hydration/samples/element-attribute-changed/_after.html b/test/hydration/samples/element-attribute-changed/_after.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-changed/_after.html
rename to test/hydration/samples/element-attribute-changed/_after.svelte
diff --git a/test/hydration/samples/element-attribute-changed/_before.html b/test/hydration/samples/element-attribute-changed/_before.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-changed/_before.html
rename to test/hydration/samples/element-attribute-changed/_before.svelte
diff --git a/test/hydration/samples/element-attribute-changed/main.html b/test/hydration/samples/element-attribute-changed/main.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-changed/main.html
rename to test/hydration/samples/element-attribute-changed/main.svelte
diff --git a/test/hydration/samples/element-attribute-removed/_after.html b/test/hydration/samples/element-attribute-removed/_after.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-removed/_after.html
rename to test/hydration/samples/element-attribute-removed/_after.svelte
diff --git a/test/hydration/samples/element-attribute-removed/_before.html b/test/hydration/samples/element-attribute-removed/_before.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-removed/_before.html
rename to test/hydration/samples/element-attribute-removed/_before.svelte
diff --git a/test/hydration/samples/element-attribute-removed/main.html b/test/hydration/samples/element-attribute-removed/main.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-removed/main.html
rename to test/hydration/samples/element-attribute-removed/main.svelte
diff --git a/test/hydration/samples/element-attribute-unchanged/_after.html b/test/hydration/samples/element-attribute-unchanged/_after.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-unchanged/_after.html
rename to test/hydration/samples/element-attribute-unchanged/_after.svelte
diff --git a/test/hydration/samples/element-attribute-unchanged/_before.html b/test/hydration/samples/element-attribute-unchanged/_before.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-unchanged/_before.html
rename to test/hydration/samples/element-attribute-unchanged/_before.svelte
diff --git a/test/hydration/samples/element-attribute-unchanged/main.html b/test/hydration/samples/element-attribute-unchanged/main.svelte
similarity index 100%
rename from test/hydration/samples/element-attribute-unchanged/main.html
rename to test/hydration/samples/element-attribute-unchanged/main.svelte
diff --git a/test/hydration/samples/element-nested/_after.html b/test/hydration/samples/element-nested/_after.svelte
similarity index 100%
rename from test/hydration/samples/element-nested/_after.html
rename to test/hydration/samples/element-nested/_after.svelte
diff --git a/test/hydration/samples/element-nested/_before.html b/test/hydration/samples/element-nested/_before.svelte
similarity index 100%
rename from test/hydration/samples/element-nested/_before.html
rename to test/hydration/samples/element-nested/_before.svelte
diff --git a/test/hydration/samples/element-nested/main.html b/test/hydration/samples/element-nested/main.svelte
similarity index 100%
rename from test/hydration/samples/element-nested/main.html
rename to test/hydration/samples/element-nested/main.svelte
diff --git a/test/hydration/samples/element-ref/_after.html b/test/hydration/samples/element-ref/_after.svelte
similarity index 100%
rename from test/hydration/samples/element-ref/_after.html
rename to test/hydration/samples/element-ref/_after.svelte
diff --git a/test/hydration/samples/element-ref/_before.html b/test/hydration/samples/element-ref/_before.svelte
similarity index 100%
rename from test/hydration/samples/element-ref/_before.html
rename to test/hydration/samples/element-ref/_before.svelte
diff --git a/test/hydration/samples/element-ref/main.html b/test/hydration/samples/element-ref/main.svelte
similarity index 100%
rename from test/hydration/samples/element-ref/main.html
rename to test/hydration/samples/element-ref/main.svelte
diff --git a/test/hydration/samples/event-handler/_after.html b/test/hydration/samples/event-handler/_after.svelte
similarity index 100%
rename from test/hydration/samples/event-handler/_after.html
rename to test/hydration/samples/event-handler/_after.svelte
diff --git a/test/hydration/samples/event-handler/_before.html b/test/hydration/samples/event-handler/_before.svelte
similarity index 100%
rename from test/hydration/samples/event-handler/_before.html
rename to test/hydration/samples/event-handler/_before.svelte
diff --git a/test/hydration/samples/event-handler/main.html b/test/hydration/samples/event-handler/main.svelte
similarity index 100%
rename from test/hydration/samples/event-handler/main.html
rename to test/hydration/samples/event-handler/main.svelte
diff --git a/test/hydration/samples/if-block-anchor/_after.html b/test/hydration/samples/if-block-anchor/_after.svelte
similarity index 100%
rename from test/hydration/samples/if-block-anchor/_after.html
rename to test/hydration/samples/if-block-anchor/_after.svelte
diff --git a/test/hydration/samples/if-block-anchor/_before.html b/test/hydration/samples/if-block-anchor/_before.svelte
similarity index 100%
rename from test/hydration/samples/if-block-anchor/_before.html
rename to test/hydration/samples/if-block-anchor/_before.svelte
diff --git a/test/hydration/samples/if-block-anchor/main.html b/test/hydration/samples/if-block-anchor/main.svelte
similarity index 100%
rename from test/hydration/samples/if-block-anchor/main.html
rename to test/hydration/samples/if-block-anchor/main.svelte
diff --git a/test/hydration/samples/if-block-false/_after.html b/test/hydration/samples/if-block-false/_after.svelte
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rename from test/hydration/samples/if-block-false/_after.html
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diff --git a/test/hydration/samples/if-block-false/_before.html b/test/hydration/samples/if-block-false/_before.svelte
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rename from test/hydration/samples/if-block-false/_before.html
rename to test/hydration/samples/if-block-false/_before.svelte
diff --git a/test/hydration/samples/if-block-false/main.html b/test/hydration/samples/if-block-false/main.svelte
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rename from test/hydration/samples/if-block-false/main.html
rename to test/hydration/samples/if-block-false/main.svelte
diff --git a/test/hydration/samples/if-block-update/_after.html b/test/hydration/samples/if-block-update/_after.svelte
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rename from test/hydration/samples/if-block-update/_after.html
rename to test/hydration/samples/if-block-update/_after.svelte
diff --git a/test/hydration/samples/if-block-update/_before.html b/test/hydration/samples/if-block-update/_before.svelte
similarity index 100%
rename from test/hydration/samples/if-block-update/_before.html
rename to test/hydration/samples/if-block-update/_before.svelte
diff --git a/test/hydration/samples/if-block-update/main.html b/test/hydration/samples/if-block-update/main.svelte
similarity index 100%
rename from test/hydration/samples/if-block-update/main.html
rename to test/hydration/samples/if-block-update/main.svelte
diff --git a/test/hydration/samples/if-block/_after.html b/test/hydration/samples/if-block/_after.svelte
similarity index 100%
rename from test/hydration/samples/if-block/_after.html
rename to test/hydration/samples/if-block/_after.svelte
diff --git a/test/hydration/samples/if-block/_before.html b/test/hydration/samples/if-block/_before.svelte
similarity index 100%
rename from test/hydration/samples/if-block/_before.html
rename to test/hydration/samples/if-block/_before.svelte
diff --git a/test/hydration/samples/if-block/main.html b/test/hydration/samples/if-block/main.svelte
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rename from test/hydration/samples/if-block/main.html
rename to test/hydration/samples/if-block/main.svelte
diff --git a/test/hydration/samples/raw/_after.html b/test/hydration/samples/raw/_after.svelte
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rename from test/hydration/samples/raw/_after.html
rename to test/hydration/samples/raw/_after.svelte
diff --git a/test/hydration/samples/raw/_before.html b/test/hydration/samples/raw/_before.svelte
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rename from test/hydration/samples/raw/_before.html
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diff --git a/test/hydration/samples/raw/main.html b/test/hydration/samples/raw/main.svelte
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rename from test/hydration/samples/raw/main.html
rename to test/hydration/samples/raw/main.svelte
diff --git a/test/hydration/samples/top-level-text/_after.html b/test/hydration/samples/top-level-text/_after.svelte
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rename from test/hydration/samples/top-level-text/_after.html
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diff --git a/test/hydration/samples/top-level-text/_before.html b/test/hydration/samples/top-level-text/_before.svelte
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rename from test/hydration/samples/top-level-text/_before.html
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diff --git a/test/hydration/samples/top-level-text/main.html b/test/hydration/samples/top-level-text/main.svelte
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rename from test/hydration/samples/top-level-text/main.html
rename to test/hydration/samples/top-level-text/main.svelte
diff --git a/test/js/samples/action-custom-event-handler/input.html b/test/js/samples/action-custom-event-handler/input.svelte
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rename from test/js/samples/action-custom-event-handler/input.html
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diff --git a/test/js/samples/action/input.html b/test/js/samples/action/input.svelte
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rename from test/js/samples/action/input.html
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diff --git a/test/js/samples/bind-width-height/input.html b/test/js/samples/bind-width-height/input.svelte
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+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import LazyLoad from './LazyLoad.html';
-</script>
-
-<LazyLoad load="{() => import('./Foo.html')}"/>
\ No newline at end of file
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+<script>
+	import LazyLoad from './LazyLoad.svelte';
+</script>
+
+<LazyLoad load="{() => import('./Foo.svelte')}"/>
\ No newline at end of file
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-<script>
-	import Imported from 'Imported.html';
-</script>
-
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\ No newline at end of file
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+<script>
+	import Imported from 'Imported.svelte';
+</script>
+
+<Imported/>
+<NonImported/>
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rename to test/runtime/samples/attribute-boolean-true/main.svelte
diff --git a/test/runtime/samples/attribute-casing/main.html b/test/runtime/samples/attribute-casing/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-casing/main.html
rename to test/runtime/samples/attribute-casing/main.svelte
diff --git a/test/runtime/samples/attribute-dynamic-multiple/main.html b/test/runtime/samples/attribute-dynamic-multiple/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-dynamic-multiple/main.html
rename to test/runtime/samples/attribute-dynamic-multiple/main.svelte
diff --git a/test/runtime/samples/attribute-dynamic-no-dependencies/main.html b/test/runtime/samples/attribute-dynamic-no-dependencies/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-dynamic-no-dependencies/main.html
rename to test/runtime/samples/attribute-dynamic-no-dependencies/main.svelte
diff --git a/test/runtime/samples/attribute-dynamic-quotemarks/main.html b/test/runtime/samples/attribute-dynamic-quotemarks/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-dynamic-quotemarks/main.html
rename to test/runtime/samples/attribute-dynamic-quotemarks/main.svelte
diff --git a/test/runtime/samples/attribute-dynamic-shorthand/main.html b/test/runtime/samples/attribute-dynamic-shorthand/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-dynamic-shorthand/main.html
rename to test/runtime/samples/attribute-dynamic-shorthand/main.svelte
diff --git a/test/runtime/samples/attribute-dynamic-type/main.html b/test/runtime/samples/attribute-dynamic-type/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-dynamic-type/main.html
rename to test/runtime/samples/attribute-dynamic-type/main.svelte
diff --git a/test/runtime/samples/attribute-dynamic/main.html b/test/runtime/samples/attribute-dynamic/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-dynamic/main.html
rename to test/runtime/samples/attribute-dynamic/main.svelte
diff --git a/test/runtime/samples/attribute-empty-svg/main.html b/test/runtime/samples/attribute-empty-svg/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-empty-svg/main.html
rename to test/runtime/samples/attribute-empty-svg/main.svelte
diff --git a/test/runtime/samples/attribute-empty/main.html b/test/runtime/samples/attribute-empty/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-empty/main.html
rename to test/runtime/samples/attribute-empty/main.svelte
diff --git a/test/runtime/samples/attribute-namespaced/main.html b/test/runtime/samples/attribute-namespaced/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-namespaced/main.html
rename to test/runtime/samples/attribute-namespaced/main.svelte
diff --git a/test/runtime/samples/attribute-partial-number/Component.html b/test/runtime/samples/attribute-partial-number/Component.svelte
similarity index 100%
rename from test/runtime/samples/attribute-partial-number/Component.html
rename to test/runtime/samples/attribute-partial-number/Component.svelte
diff --git a/test/runtime/samples/attribute-partial-number/main.html b/test/runtime/samples/attribute-partial-number/main.html
deleted file mode 100644
index c720ea4eed..0000000000
--- a/test/runtime/samples/attribute-partial-number/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Component from './Component.html';
-</script>
-
-<Component value="10px"/>
\ No newline at end of file
diff --git a/test/runtime/samples/attribute-partial-number/main.svelte b/test/runtime/samples/attribute-partial-number/main.svelte
new file mode 100644
index 0000000000..163116e4fa
--- /dev/null
+++ b/test/runtime/samples/attribute-partial-number/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Component from './Component.svelte';
+</script>
+
+<Component value="10px"/>
\ No newline at end of file
diff --git a/test/runtime/samples/attribute-prefer-expression/main.html b/test/runtime/samples/attribute-prefer-expression/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-prefer-expression/main.html
rename to test/runtime/samples/attribute-prefer-expression/main.svelte
diff --git a/test/runtime/samples/attribute-static-at-symbol/main.html b/test/runtime/samples/attribute-static-at-symbol/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-static-at-symbol/main.html
rename to test/runtime/samples/attribute-static-at-symbol/main.svelte
diff --git a/test/runtime/samples/attribute-static-boolean/main.html b/test/runtime/samples/attribute-static-boolean/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-static-boolean/main.html
rename to test/runtime/samples/attribute-static-boolean/main.svelte
diff --git a/test/runtime/samples/attribute-static-quotemarks/main.html b/test/runtime/samples/attribute-static-quotemarks/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-static-quotemarks/main.html
rename to test/runtime/samples/attribute-static-quotemarks/main.svelte
diff --git a/test/runtime/samples/attribute-static/main.html b/test/runtime/samples/attribute-static/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-static/main.html
rename to test/runtime/samples/attribute-static/main.svelte
diff --git a/test/runtime/samples/attribute-unknown-without-value/main.html b/test/runtime/samples/attribute-unknown-without-value/main.svelte
similarity index 100%
rename from test/runtime/samples/attribute-unknown-without-value/main.html
rename to test/runtime/samples/attribute-unknown-without-value/main.svelte
diff --git a/test/runtime/samples/autofocus/main.html b/test/runtime/samples/autofocus/main.svelte
similarity index 100%
rename from test/runtime/samples/autofocus/main.html
rename to test/runtime/samples/autofocus/main.svelte
diff --git a/test/runtime/samples/await-component-oncreate/Foo.html b/test/runtime/samples/await-component-oncreate/Foo.svelte
similarity index 100%
rename from test/runtime/samples/await-component-oncreate/Foo.html
rename to test/runtime/samples/await-component-oncreate/Foo.svelte
diff --git a/test/runtime/samples/await-component-oncreate/main.html b/test/runtime/samples/await-component-oncreate/main.svelte
similarity index 67%
rename from test/runtime/samples/await-component-oncreate/main.html
rename to test/runtime/samples/await-component-oncreate/main.svelte
index 80a686962e..d1ddc16fd2 100644
--- a/test/runtime/samples/await-component-oncreate/main.html
+++ b/test/runtime/samples/await-component-oncreate/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 
 	export let promise;
 </script>
diff --git a/test/runtime/samples/await-containing-if/main.html b/test/runtime/samples/await-containing-if/main.svelte
similarity index 100%
rename from test/runtime/samples/await-containing-if/main.html
rename to test/runtime/samples/await-containing-if/main.svelte
diff --git a/test/runtime/samples/await-in-each/main.html b/test/runtime/samples/await-in-each/main.svelte
similarity index 100%
rename from test/runtime/samples/await-in-each/main.html
rename to test/runtime/samples/await-in-each/main.svelte
diff --git a/test/runtime/samples/await-set-simultaneous/main.html b/test/runtime/samples/await-set-simultaneous/main.svelte
similarity index 100%
rename from test/runtime/samples/await-set-simultaneous/main.html
rename to test/runtime/samples/await-set-simultaneous/main.svelte
diff --git a/test/runtime/samples/await-then-catch-anchor/main.html b/test/runtime/samples/await-then-catch-anchor/main.svelte
similarity index 100%
rename from test/runtime/samples/await-then-catch-anchor/main.html
rename to test/runtime/samples/await-then-catch-anchor/main.svelte
diff --git a/test/runtime/samples/await-then-catch-event/main.html b/test/runtime/samples/await-then-catch-event/main.svelte
similarity index 100%
rename from test/runtime/samples/await-then-catch-event/main.html
rename to test/runtime/samples/await-then-catch-event/main.svelte
diff --git a/test/runtime/samples/await-then-catch-if/main.html b/test/runtime/samples/await-then-catch-if/main.svelte
similarity index 100%
rename from test/runtime/samples/await-then-catch-if/main.html
rename to test/runtime/samples/await-then-catch-if/main.svelte
diff --git a/test/runtime/samples/await-then-catch-in-slot/Foo.html b/test/runtime/samples/await-then-catch-in-slot/Foo.svelte
similarity index 100%
rename from test/runtime/samples/await-then-catch-in-slot/Foo.html
rename to test/runtime/samples/await-then-catch-in-slot/Foo.svelte
diff --git a/test/runtime/samples/await-then-catch-in-slot/main.html b/test/runtime/samples/await-then-catch-in-slot/main.svelte
similarity index 84%
rename from test/runtime/samples/await-then-catch-in-slot/main.html
rename to test/runtime/samples/await-then-catch-in-slot/main.svelte
index ded116356c..3aa75374ea 100644
--- a/test/runtime/samples/await-then-catch-in-slot/main.html
+++ b/test/runtime/samples/await-then-catch-in-slot/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 
 	export let thePromise;
 </script>
diff --git a/test/runtime/samples/await-then-catch-multiple/main.html b/test/runtime/samples/await-then-catch-multiple/main.svelte
similarity index 100%
rename from test/runtime/samples/await-then-catch-multiple/main.html
rename to test/runtime/samples/await-then-catch-multiple/main.svelte
diff --git a/test/runtime/samples/await-then-catch-no-values/main.html b/test/runtime/samples/await-then-catch-no-values/main.svelte
similarity index 100%
rename from test/runtime/samples/await-then-catch-no-values/main.html
rename to test/runtime/samples/await-then-catch-no-values/main.svelte
diff --git a/test/runtime/samples/await-then-catch-non-promise/main.html b/test/runtime/samples/await-then-catch-non-promise/main.svelte
similarity index 100%
rename from test/runtime/samples/await-then-catch-non-promise/main.html
rename to test/runtime/samples/await-then-catch-non-promise/main.svelte
diff --git a/test/runtime/samples/await-then-catch-order/main.html b/test/runtime/samples/await-then-catch-order/main.svelte
similarity index 100%
rename from test/runtime/samples/await-then-catch-order/main.html
rename to test/runtime/samples/await-then-catch-order/main.svelte
diff --git a/test/runtime/samples/await-then-catch-static/main.html b/test/runtime/samples/await-then-catch-static/main.svelte
similarity index 100%
rename from test/runtime/samples/await-then-catch-static/main.html
rename to test/runtime/samples/await-then-catch-static/main.svelte
diff --git a/test/runtime/samples/await-then-catch/main.html b/test/runtime/samples/await-then-catch/main.svelte
similarity index 100%
rename from test/runtime/samples/await-then-catch/main.html
rename to test/runtime/samples/await-then-catch/main.svelte
diff --git a/test/runtime/samples/await-then-shorthand/main.html b/test/runtime/samples/await-then-shorthand/main.svelte
similarity index 100%
rename from test/runtime/samples/await-then-shorthand/main.html
rename to test/runtime/samples/await-then-shorthand/main.svelte
diff --git a/test/runtime/samples/await-with-components/Widget.html b/test/runtime/samples/await-with-components/Widget.svelte
similarity index 100%
rename from test/runtime/samples/await-with-components/Widget.html
rename to test/runtime/samples/await-with-components/Widget.svelte
diff --git a/test/runtime/samples/await-with-components/main.html b/test/runtime/samples/await-with-components/main.svelte
similarity index 78%
rename from test/runtime/samples/await-with-components/main.html
rename to test/runtime/samples/await-with-components/main.svelte
index 84894997e1..02b32bb496 100644
--- a/test/runtime/samples/await-with-components/main.html
+++ b/test/runtime/samples/await-with-components/main.svelte
@@ -7,6 +7,6 @@
 {/await}
 
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 	export let promise = Promise.resolve();
 </script>
\ No newline at end of file
diff --git a/test/runtime/samples/before-render-chain/Item.html b/test/runtime/samples/before-render-chain/Item.svelte
similarity index 100%
rename from test/runtime/samples/before-render-chain/Item.html
rename to test/runtime/samples/before-render-chain/Item.svelte
diff --git a/test/runtime/samples/before-render-chain/List.html b/test/runtime/samples/before-render-chain/List.svelte
similarity index 82%
rename from test/runtime/samples/before-render-chain/List.html
rename to test/runtime/samples/before-render-chain/List.svelte
index 645356bd92..5b12d8a104 100644
--- a/test/runtime/samples/before-render-chain/List.html
+++ b/test/runtime/samples/before-render-chain/List.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Item from './Item.html';
+	import Item from './Item.svelte';
 
 	export let items = [3, 2, 1];
 
diff --git a/test/runtime/samples/before-render-chain/main.html b/test/runtime/samples/before-render-chain/main.svelte
similarity index 64%
rename from test/runtime/samples/before-render-chain/main.html
rename to test/runtime/samples/before-render-chain/main.svelte
index e194fe786a..4f6e432aa8 100644
--- a/test/runtime/samples/before-render-chain/main.html
+++ b/test/runtime/samples/before-render-chain/main.svelte
@@ -1,7 +1,7 @@
 <script>
 	export let list;
 
-	import List from './List.html';
+	import List from './List.svelte';
 </script>
 
 <List bind:this={list}/>
diff --git a/test/runtime/samples/before-render-prevents-loop/main.html b/test/runtime/samples/before-render-prevents-loop/main.svelte
similarity index 100%
rename from test/runtime/samples/before-render-prevents-loop/main.html
rename to test/runtime/samples/before-render-prevents-loop/main.svelte
diff --git a/test/runtime/samples/binding-audio-currenttime-duration-volume/main.html b/test/runtime/samples/binding-audio-currenttime-duration-volume/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-audio-currenttime-duration-volume/main.html
rename to test/runtime/samples/binding-audio-currenttime-duration-volume/main.svelte
diff --git a/test/runtime/samples/binding-indirect-computed/main.html b/test/runtime/samples/binding-indirect-computed/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-indirect-computed/main.html
rename to test/runtime/samples/binding-indirect-computed/main.svelte
diff --git a/test/runtime/samples/binding-indirect/main.html b/test/runtime/samples/binding-indirect/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-indirect/main.html
rename to test/runtime/samples/binding-indirect/main.svelte
diff --git a/test/runtime/samples/binding-input-checkbox-deep-contextual/main.html b/test/runtime/samples/binding-input-checkbox-deep-contextual/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-checkbox-deep-contextual/main.html
rename to test/runtime/samples/binding-input-checkbox-deep-contextual/main.svelte
diff --git a/test/runtime/samples/binding-input-checkbox-group-outside-each/main.html b/test/runtime/samples/binding-input-checkbox-group-outside-each/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-checkbox-group-outside-each/main.html
rename to test/runtime/samples/binding-input-checkbox-group-outside-each/main.svelte
diff --git a/test/runtime/samples/binding-input-checkbox-group/main.html b/test/runtime/samples/binding-input-checkbox-group/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-checkbox-group/main.html
rename to test/runtime/samples/binding-input-checkbox-group/main.svelte
diff --git a/test/runtime/samples/binding-input-checkbox-indeterminate/main.html b/test/runtime/samples/binding-input-checkbox-indeterminate/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-checkbox-indeterminate/main.html
rename to test/runtime/samples/binding-input-checkbox-indeterminate/main.svelte
diff --git a/test/runtime/samples/binding-input-checkbox-with-event-in-each/main.html b/test/runtime/samples/binding-input-checkbox-with-event-in-each/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-checkbox-with-event-in-each/main.html
rename to test/runtime/samples/binding-input-checkbox-with-event-in-each/main.svelte
diff --git a/test/runtime/samples/binding-input-checkbox/main.html b/test/runtime/samples/binding-input-checkbox/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-checkbox/main.html
rename to test/runtime/samples/binding-input-checkbox/main.svelte
diff --git a/test/runtime/samples/binding-input-number/main.html b/test/runtime/samples/binding-input-number/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-number/main.html
rename to test/runtime/samples/binding-input-number/main.svelte
diff --git a/test/runtime/samples/binding-input-radio-group/main.html b/test/runtime/samples/binding-input-radio-group/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-radio-group/main.html
rename to test/runtime/samples/binding-input-radio-group/main.svelte
diff --git a/test/runtime/samples/binding-input-range-change/main.html b/test/runtime/samples/binding-input-range-change/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-range-change/main.html
rename to test/runtime/samples/binding-input-range-change/main.svelte
diff --git a/test/runtime/samples/binding-input-range/main.html b/test/runtime/samples/binding-input-range/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-range/main.html
rename to test/runtime/samples/binding-input-range/main.svelte
diff --git a/test/runtime/samples/binding-input-text-contextual-deconflicted/main.html b/test/runtime/samples/binding-input-text-contextual-deconflicted/main.svelte
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rename from test/runtime/samples/binding-input-text-contextual-deconflicted/main.html
rename to test/runtime/samples/binding-input-text-contextual-deconflicted/main.svelte
diff --git a/test/runtime/samples/binding-input-text-contextual/main.html b/test/runtime/samples/binding-input-text-contextual/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-text-contextual/main.html
rename to test/runtime/samples/binding-input-text-contextual/main.svelte
diff --git a/test/runtime/samples/binding-input-text-deconflicted/main.html b/test/runtime/samples/binding-input-text-deconflicted/main.svelte
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rename from test/runtime/samples/binding-input-text-deconflicted/main.html
rename to test/runtime/samples/binding-input-text-deconflicted/main.svelte
diff --git a/test/runtime/samples/binding-input-text-deep-computed-dynamic/main.html b/test/runtime/samples/binding-input-text-deep-computed-dynamic/main.svelte
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rename from test/runtime/samples/binding-input-text-deep-computed-dynamic/main.html
rename to test/runtime/samples/binding-input-text-deep-computed-dynamic/main.svelte
diff --git a/test/runtime/samples/binding-input-text-deep-computed/main.html b/test/runtime/samples/binding-input-text-deep-computed/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-text-deep-computed/main.html
rename to test/runtime/samples/binding-input-text-deep-computed/main.svelte
diff --git a/test/runtime/samples/binding-input-text-deep-contextual-computed-dynamic/main.html b/test/runtime/samples/binding-input-text-deep-contextual-computed-dynamic/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-text-deep-contextual-computed-dynamic/main.html
rename to test/runtime/samples/binding-input-text-deep-contextual-computed-dynamic/main.svelte
diff --git a/test/runtime/samples/binding-input-text-deep-contextual/main.html b/test/runtime/samples/binding-input-text-deep-contextual/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-text-deep-contextual/main.html
rename to test/runtime/samples/binding-input-text-deep-contextual/main.svelte
diff --git a/test/runtime/samples/binding-input-text-deep/main.html b/test/runtime/samples/binding-input-text-deep/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-text-deep/main.html
rename to test/runtime/samples/binding-input-text-deep/main.svelte
diff --git a/test/runtime/samples/binding-input-text/main.html b/test/runtime/samples/binding-input-text/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-text/main.html
rename to test/runtime/samples/binding-input-text/main.svelte
diff --git a/test/runtime/samples/binding-input-with-event/main.html b/test/runtime/samples/binding-input-with-event/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-input-with-event/main.html
rename to test/runtime/samples/binding-input-with-event/main.svelte
diff --git a/test/runtime/samples/binding-select-implicit-option-value/main.html b/test/runtime/samples/binding-select-implicit-option-value/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-select-implicit-option-value/main.html
rename to test/runtime/samples/binding-select-implicit-option-value/main.svelte
diff --git a/test/runtime/samples/binding-select-in-each-block/main.html b/test/runtime/samples/binding-select-in-each-block/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-select-in-each-block/main.html
rename to test/runtime/samples/binding-select-in-each-block/main.svelte
diff --git a/test/runtime/samples/binding-select-in-yield/Modal.html b/test/runtime/samples/binding-select-in-yield/Modal.svelte
similarity index 100%
rename from test/runtime/samples/binding-select-in-yield/Modal.html
rename to test/runtime/samples/binding-select-in-yield/Modal.svelte
diff --git a/test/runtime/samples/binding-select-in-yield/main.html b/test/runtime/samples/binding-select-in-yield/main.svelte
similarity index 85%
rename from test/runtime/samples/binding-select-in-yield/main.html
rename to test/runtime/samples/binding-select-in-yield/main.svelte
index cb1499e1c7..2d3ef28f28 100644
--- a/test/runtime/samples/binding-select-in-yield/main.html
+++ b/test/runtime/samples/binding-select-in-yield/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Modal from './Modal.html';
+	import Modal from './Modal.svelte';
 
 	export let modal;
 	export let letter;
diff --git a/test/runtime/samples/binding-select-initial-value-undefined/main.html b/test/runtime/samples/binding-select-initial-value-undefined/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-select-initial-value-undefined/main.html
rename to test/runtime/samples/binding-select-initial-value-undefined/main.svelte
diff --git a/test/runtime/samples/binding-select-initial-value/main.html b/test/runtime/samples/binding-select-initial-value/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-select-initial-value/main.html
rename to test/runtime/samples/binding-select-initial-value/main.svelte
diff --git a/test/runtime/samples/binding-select-late/main.html b/test/runtime/samples/binding-select-late/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-select-late/main.html
rename to test/runtime/samples/binding-select-late/main.svelte
diff --git a/test/runtime/samples/binding-select-multiple/main.html b/test/runtime/samples/binding-select-multiple/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-select-multiple/main.html
rename to test/runtime/samples/binding-select-multiple/main.svelte
diff --git a/test/runtime/samples/binding-select-optgroup/main.html b/test/runtime/samples/binding-select-optgroup/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-select-optgroup/main.html
rename to test/runtime/samples/binding-select-optgroup/main.svelte
diff --git a/test/runtime/samples/binding-select/main.html b/test/runtime/samples/binding-select/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-select/main.html
rename to test/runtime/samples/binding-select/main.svelte
diff --git a/test/runtime/samples/binding-store-deep/main.html b/test/runtime/samples/binding-store-deep/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-store-deep/main.html
rename to test/runtime/samples/binding-store-deep/main.svelte
diff --git a/test/runtime/samples/binding-store/main.html b/test/runtime/samples/binding-store/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-store/main.html
rename to test/runtime/samples/binding-store/main.svelte
diff --git a/test/runtime/samples/binding-textarea/main.html b/test/runtime/samples/binding-textarea/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-textarea/main.html
rename to test/runtime/samples/binding-textarea/main.svelte
diff --git a/test/runtime/samples/binding-this-and-value/main.html b/test/runtime/samples/binding-this-and-value/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-this-and-value/main.html
rename to test/runtime/samples/binding-this-and-value/main.svelte
diff --git a/test/runtime/samples/binding-this-component-reactive/Foo.html b/test/runtime/samples/binding-this-component-reactive/Foo.svelte
similarity index 100%
rename from test/runtime/samples/binding-this-component-reactive/Foo.html
rename to test/runtime/samples/binding-this-component-reactive/Foo.svelte
diff --git a/test/runtime/samples/binding-this-component-reactive/main.html b/test/runtime/samples/binding-this-component-reactive/main.svelte
similarity index 73%
rename from test/runtime/samples/binding-this-component-reactive/main.html
rename to test/runtime/samples/binding-this-component-reactive/main.svelte
index b9a4709bd7..25b134105b 100644
--- a/test/runtime/samples/binding-this-component-reactive/main.html
+++ b/test/runtime/samples/binding-this-component-reactive/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 	export let foo;
 </script>
 
diff --git a/test/runtime/samples/binding-this-element-reactive/main.html b/test/runtime/samples/binding-this-element-reactive/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-this-element-reactive/main.html
rename to test/runtime/samples/binding-this-element-reactive/main.svelte
diff --git a/test/runtime/samples/binding-this-no-innerhtml/main.html b/test/runtime/samples/binding-this-no-innerhtml/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-this-no-innerhtml/main.html
rename to test/runtime/samples/binding-this-no-innerhtml/main.svelte
diff --git a/test/runtime/samples/binding-this-unset/main.html b/test/runtime/samples/binding-this-unset/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-this-unset/main.html
rename to test/runtime/samples/binding-this-unset/main.svelte
diff --git a/test/runtime/samples/binding-this-with-context/main.html b/test/runtime/samples/binding-this-with-context/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-this-with-context/main.html
rename to test/runtime/samples/binding-this-with-context/main.svelte
diff --git a/test/runtime/samples/binding-this/main.html b/test/runtime/samples/binding-this/main.svelte
similarity index 100%
rename from test/runtime/samples/binding-this/main.html
rename to test/runtime/samples/binding-this/main.svelte
diff --git a/test/runtime/samples/bindings-before-onmount/One.html b/test/runtime/samples/bindings-before-onmount/One.svelte
similarity index 74%
rename from test/runtime/samples/bindings-before-onmount/One.html
rename to test/runtime/samples/bindings-before-onmount/One.svelte
index b2ba905ec9..5dd38a6f08 100644
--- a/test/runtime/samples/bindings-before-onmount/One.html
+++ b/test/runtime/samples/bindings-before-onmount/One.svelte
@@ -1,6 +1,6 @@
 <script>
 	import { onMount } from 'svelte';
-	import Two from './Two.html';
+	import Two from './Two.svelte';
 
 	export let snapshot;
 	export let foo;
diff --git a/test/runtime/samples/bindings-before-onmount/Two.html b/test/runtime/samples/bindings-before-onmount/Two.svelte
similarity index 100%
rename from test/runtime/samples/bindings-before-onmount/Two.html
rename to test/runtime/samples/bindings-before-onmount/Two.svelte
diff --git a/test/runtime/samples/bindings-before-onmount/main.html b/test/runtime/samples/bindings-before-onmount/main.html
deleted file mode 100644
index efb36a208e..0000000000
--- a/test/runtime/samples/bindings-before-onmount/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import One from './One.html';
-
-	export let one;
-</script>
-
-<One bind:this={one}/>
\ No newline at end of file
diff --git a/test/runtime/samples/bindings-before-onmount/main.svelte b/test/runtime/samples/bindings-before-onmount/main.svelte
new file mode 100644
index 0000000000..65c1221b26
--- /dev/null
+++ b/test/runtime/samples/bindings-before-onmount/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import One from './One.svelte';
+
+	export let one;
+</script>
+
+<One bind:this={one}/>
\ No newline at end of file
diff --git a/test/runtime/samples/bindings-coalesced/Foo.html b/test/runtime/samples/bindings-coalesced/Foo.svelte
similarity index 100%
rename from test/runtime/samples/bindings-coalesced/Foo.html
rename to test/runtime/samples/bindings-coalesced/Foo.svelte
diff --git a/test/runtime/samples/bindings-coalesced/main.html b/test/runtime/samples/bindings-coalesced/main.svelte
similarity index 66%
rename from test/runtime/samples/bindings-coalesced/main.html
rename to test/runtime/samples/bindings-coalesced/main.svelte
index cf0b85491a..003f89c6d9 100644
--- a/test/runtime/samples/bindings-coalesced/main.html
+++ b/test/runtime/samples/bindings-coalesced/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 
 	export let p;
 
diff --git a/test/runtime/samples/class-boolean/main.html b/test/runtime/samples/class-boolean/main.svelte
similarity index 100%
rename from test/runtime/samples/class-boolean/main.html
rename to test/runtime/samples/class-boolean/main.svelte
diff --git a/test/runtime/samples/class-helper/main.html b/test/runtime/samples/class-helper/main.svelte
similarity index 100%
rename from test/runtime/samples/class-helper/main.html
rename to test/runtime/samples/class-helper/main.svelte
diff --git a/test/runtime/samples/class-in-each/main.html b/test/runtime/samples/class-in-each/main.svelte
similarity index 100%
rename from test/runtime/samples/class-in-each/main.html
rename to test/runtime/samples/class-in-each/main.svelte
diff --git a/test/runtime/samples/class-shortcut-with-class/main.html b/test/runtime/samples/class-shortcut-with-class/main.svelte
similarity index 100%
rename from test/runtime/samples/class-shortcut-with-class/main.html
rename to test/runtime/samples/class-shortcut-with-class/main.svelte
diff --git a/test/runtime/samples/class-shortcut/main.html b/test/runtime/samples/class-shortcut/main.svelte
similarity index 100%
rename from test/runtime/samples/class-shortcut/main.html
rename to test/runtime/samples/class-shortcut/main.svelte
diff --git a/test/runtime/samples/class-with-attribute/main.html b/test/runtime/samples/class-with-attribute/main.svelte
similarity index 100%
rename from test/runtime/samples/class-with-attribute/main.html
rename to test/runtime/samples/class-with-attribute/main.svelte
diff --git a/test/runtime/samples/class-with-dynamic-attribute/main.html b/test/runtime/samples/class-with-dynamic-attribute/main.svelte
similarity index 100%
rename from test/runtime/samples/class-with-dynamic-attribute/main.html
rename to test/runtime/samples/class-with-dynamic-attribute/main.svelte
diff --git a/test/runtime/samples/component-binding-blowback-b/Nested.html b/test/runtime/samples/component-binding-blowback-b/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-blowback-b/Nested.html
rename to test/runtime/samples/component-binding-blowback-b/Nested.svelte
diff --git a/test/runtime/samples/component-binding-blowback-b/main.html b/test/runtime/samples/component-binding-blowback-b/main.svelte
similarity index 88%
rename from test/runtime/samples/component-binding-blowback-b/main.html
rename to test/runtime/samples/component-binding-blowback-b/main.svelte
index 327b64ca09..92a618f67c 100644
--- a/test/runtime/samples/component-binding-blowback-b/main.html
+++ b/test/runtime/samples/component-binding-blowback-b/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let count;
 	export let idToValue = Object.create(null);
diff --git a/test/runtime/samples/component-binding-blowback-c/Nested.html b/test/runtime/samples/component-binding-blowback-c/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-blowback-c/Nested.html
rename to test/runtime/samples/component-binding-blowback-c/Nested.svelte
diff --git a/test/runtime/samples/component-binding-blowback-c/main.html b/test/runtime/samples/component-binding-blowback-c/main.svelte
similarity index 90%
rename from test/runtime/samples/component-binding-blowback-c/main.html
rename to test/runtime/samples/component-binding-blowback-c/main.svelte
index 1360229444..4876af13a8 100644
--- a/test/runtime/samples/component-binding-blowback-c/main.html
+++ b/test/runtime/samples/component-binding-blowback-c/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let count;
 	export let idToValue = Object.create(null);
diff --git a/test/runtime/samples/component-binding-blowback/Widget.html b/test/runtime/samples/component-binding-blowback/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-blowback/Widget.html
rename to test/runtime/samples/component-binding-blowback/Widget.svelte
diff --git a/test/runtime/samples/component-binding-blowback/main.html b/test/runtime/samples/component-binding-blowback/main.svelte
similarity index 72%
rename from test/runtime/samples/component-binding-blowback/main.html
rename to test/runtime/samples/component-binding-blowback/main.svelte
index f51c889fc3..cd2e4d1c3b 100644
--- a/test/runtime/samples/component-binding-blowback/main.html
+++ b/test/runtime/samples/component-binding-blowback/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let x = false;
 	export let bar = {
diff --git a/test/runtime/samples/component-binding-computed/Nested.html b/test/runtime/samples/component-binding-computed/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-computed/Nested.html
rename to test/runtime/samples/component-binding-computed/Nested.svelte
diff --git a/test/runtime/samples/component-binding-computed/main.html b/test/runtime/samples/component-binding-computed/main.svelte
similarity index 81%
rename from test/runtime/samples/component-binding-computed/main.html
rename to test/runtime/samples/component-binding-computed/main.svelte
index f1b9be4e16..e9b5a1be92 100644
--- a/test/runtime/samples/component-binding-computed/main.html
+++ b/test/runtime/samples/component-binding-computed/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let fields = ['firstname', 'lastname'];
 	export let values = {
diff --git a/test/runtime/samples/component-binding-conditional-b/Bar.html b/test/runtime/samples/component-binding-conditional-b/Bar.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-conditional-b/Bar.html
rename to test/runtime/samples/component-binding-conditional-b/Bar.svelte
diff --git a/test/runtime/samples/component-binding-conditional-b/Baz.html b/test/runtime/samples/component-binding-conditional-b/Baz.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-conditional-b/Baz.html
rename to test/runtime/samples/component-binding-conditional-b/Baz.svelte
diff --git a/test/runtime/samples/component-binding-conditional-b/Foo.html b/test/runtime/samples/component-binding-conditional-b/Foo.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-conditional-b/Foo.html
rename to test/runtime/samples/component-binding-conditional-b/Foo.svelte
diff --git a/test/runtime/samples/component-binding-conditional-b/main.html b/test/runtime/samples/component-binding-conditional-b/main.svelte
similarity index 54%
rename from test/runtime/samples/component-binding-conditional-b/main.html
rename to test/runtime/samples/component-binding-conditional-b/main.svelte
index a96c8b671d..568fb031fb 100644
--- a/test/runtime/samples/component-binding-conditional-b/main.html
+++ b/test/runtime/samples/component-binding-conditional-b/main.svelte
@@ -1,7 +1,7 @@
 <script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
-	import Baz from './Baz.html';
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
+	import Baz from './Baz.svelte';
 
 	export let y;
 	export let x;
diff --git a/test/runtime/samples/component-binding-conditional/Bar.html b/test/runtime/samples/component-binding-conditional/Bar.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-conditional/Bar.html
rename to test/runtime/samples/component-binding-conditional/Bar.svelte
diff --git a/test/runtime/samples/component-binding-conditional/Baz.html b/test/runtime/samples/component-binding-conditional/Baz.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-conditional/Baz.html
rename to test/runtime/samples/component-binding-conditional/Baz.svelte
diff --git a/test/runtime/samples/component-binding-conditional/Foo.html b/test/runtime/samples/component-binding-conditional/Foo.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-conditional/Foo.html
rename to test/runtime/samples/component-binding-conditional/Foo.svelte
diff --git a/test/runtime/samples/component-binding-conditional/main.html b/test/runtime/samples/component-binding-conditional/main.svelte
similarity index 51%
rename from test/runtime/samples/component-binding-conditional/main.html
rename to test/runtime/samples/component-binding-conditional/main.svelte
index 9316eb5866..fee850a65a 100644
--- a/test/runtime/samples/component-binding-conditional/main.html
+++ b/test/runtime/samples/component-binding-conditional/main.svelte
@@ -1,7 +1,7 @@
 <script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
-	import Baz from './Baz.html';
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
+	import Baz from './Baz.svelte';
 
 	export let y;
 	export let x;
diff --git a/test/runtime/samples/component-binding-deep-b/ComponentSelector.html b/test/runtime/samples/component-binding-deep-b/ComponentSelector.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-deep-b/ComponentSelector.html
rename to test/runtime/samples/component-binding-deep-b/ComponentSelector.svelte
diff --git a/test/runtime/samples/component-binding-deep-b/Editor.html b/test/runtime/samples/component-binding-deep-b/Editor.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-deep-b/Editor.html
rename to test/runtime/samples/component-binding-deep-b/Editor.svelte
diff --git a/test/runtime/samples/component-binding-deep-b/main.html b/test/runtime/samples/component-binding-deep-b/main.svelte
similarity index 88%
rename from test/runtime/samples/component-binding-deep-b/main.html
rename to test/runtime/samples/component-binding-deep-b/main.svelte
index a2de980483..a96f65a30e 100644
--- a/test/runtime/samples/component-binding-deep-b/main.html
+++ b/test/runtime/samples/component-binding-deep-b/main.svelte
@@ -1,8 +1,8 @@
 <script>
 	import { beforeUpdate } from 'svelte';
 
-	import Editor from './Editor.html';
-	import ComponentSelector from './ComponentSelector.html';
+	import Editor from './Editor.svelte';
+	import ComponentSelector from './ComponentSelector.svelte';
 
 	export let components;
 	export let selectedComponent;
diff --git a/test/runtime/samples/component-binding-deep/Widget.html b/test/runtime/samples/component-binding-deep/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-deep/Widget.html
rename to test/runtime/samples/component-binding-deep/Widget.svelte
diff --git a/test/runtime/samples/component-binding-deep/main.html b/test/runtime/samples/component-binding-deep/main.svelte
similarity index 62%
rename from test/runtime/samples/component-binding-deep/main.html
rename to test/runtime/samples/component-binding-deep/main.svelte
index 720ac74dd7..a364a91e3f 100644
--- a/test/runtime/samples/component-binding-deep/main.html
+++ b/test/runtime/samples/component-binding-deep/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let deep = {
 		name: 'foo'
diff --git a/test/runtime/samples/component-binding-each-nested/Widget.html b/test/runtime/samples/component-binding-each-nested/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-each-nested/Widget.html
rename to test/runtime/samples/component-binding-each-nested/Widget.svelte
diff --git a/test/runtime/samples/component-binding-each-nested/main.html b/test/runtime/samples/component-binding-each-nested/main.svelte
similarity index 71%
rename from test/runtime/samples/component-binding-each-nested/main.html
rename to test/runtime/samples/component-binding-each-nested/main.svelte
index db8b232336..3ac4638c9a 100644
--- a/test/runtime/samples/component-binding-each-nested/main.html
+++ b/test/runtime/samples/component-binding-each-nested/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let a = [{ name: 'foo' }, { name: 'bar' }, { name: 'baz' }];
 	export let getName = x => x.name;
diff --git a/test/runtime/samples/component-binding-each-object/Widget.html b/test/runtime/samples/component-binding-each-object/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-each-object/Widget.html
rename to test/runtime/samples/component-binding-each-object/Widget.svelte
diff --git a/test/runtime/samples/component-binding-each-object/main.html b/test/runtime/samples/component-binding-each-object/main.svelte
similarity index 62%
rename from test/runtime/samples/component-binding-each-object/main.html
rename to test/runtime/samples/component-binding-each-object/main.svelte
index 1efb284666..4f77440ae0 100644
--- a/test/runtime/samples/component-binding-each-object/main.html
+++ b/test/runtime/samples/component-binding-each-object/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let a;
 </script>
diff --git a/test/runtime/samples/component-binding-each/Widget.html b/test/runtime/samples/component-binding-each/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-each/Widget.html
rename to test/runtime/samples/component-binding-each/Widget.svelte
diff --git a/test/runtime/samples/component-binding-each/main.html b/test/runtime/samples/component-binding-each/main.svelte
similarity index 64%
rename from test/runtime/samples/component-binding-each/main.html
rename to test/runtime/samples/component-binding-each/main.svelte
index 49ab04e68f..36a7c46225 100644
--- a/test/runtime/samples/component-binding-each/main.html
+++ b/test/runtime/samples/component-binding-each/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let a = ['foo', 'bar', 'baz'];
 </script>
diff --git a/test/runtime/samples/component-binding-infinite-loop/A.html b/test/runtime/samples/component-binding-infinite-loop/A.svelte
similarity index 58%
rename from test/runtime/samples/component-binding-infinite-loop/A.html
rename to test/runtime/samples/component-binding-infinite-loop/A.svelte
index d4a9bf8eac..8ba3ec20f3 100644
--- a/test/runtime/samples/component-binding-infinite-loop/A.html
+++ b/test/runtime/samples/component-binding-infinite-loop/A.svelte
@@ -1,5 +1,5 @@
 <script>
-	import B from './B.html';
+	import B from './B.svelte';
 
 	export let currentIdentifier;
 </script>
diff --git a/test/runtime/samples/component-binding-infinite-loop/B.html b/test/runtime/samples/component-binding-infinite-loop/B.svelte
similarity index 83%
rename from test/runtime/samples/component-binding-infinite-loop/B.html
rename to test/runtime/samples/component-binding-infinite-loop/B.svelte
index 72bbbe4110..cbc8160679 100644
--- a/test/runtime/samples/component-binding-infinite-loop/B.html
+++ b/test/runtime/samples/component-binding-infinite-loop/B.svelte
@@ -1,5 +1,5 @@
 <script>
-	import C from './C.html';
+	import C from './C.svelte';
 
 	export let list = [1, 2, 3, 2, 1];
 	export let currentIdentifier;
diff --git a/test/runtime/samples/component-binding-infinite-loop/C.html b/test/runtime/samples/component-binding-infinite-loop/C.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-infinite-loop/C.html
rename to test/runtime/samples/component-binding-infinite-loop/C.svelte
diff --git a/test/runtime/samples/component-binding-infinite-loop/main.html b/test/runtime/samples/component-binding-infinite-loop/main.svelte
similarity index 59%
rename from test/runtime/samples/component-binding-infinite-loop/main.html
rename to test/runtime/samples/component-binding-infinite-loop/main.svelte
index b896316960..6556a7c12a 100644
--- a/test/runtime/samples/component-binding-infinite-loop/main.html
+++ b/test/runtime/samples/component-binding-infinite-loop/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import A from './A.html';
+	import A from './A.svelte';
 
 	export let currentIdentifier = 2;
 </script>
diff --git a/test/runtime/samples/component-binding-nested/Bar.html b/test/runtime/samples/component-binding-nested/Bar.svelte
similarity index 71%
rename from test/runtime/samples/component-binding-nested/Bar.html
rename to test/runtime/samples/component-binding-nested/Bar.svelte
index 9ed5c6f42c..19159f168d 100644
--- a/test/runtime/samples/component-binding-nested/Bar.html
+++ b/test/runtime/samples/component-binding-nested/Bar.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Baz from './Baz.html';
+	import Baz from './Baz.svelte';
 
 	export let x;
 </script>
diff --git a/test/runtime/samples/component-binding-nested/Baz.html b/test/runtime/samples/component-binding-nested/Baz.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-nested/Baz.html
rename to test/runtime/samples/component-binding-nested/Baz.svelte
diff --git a/test/runtime/samples/component-binding-nested/Foo.html b/test/runtime/samples/component-binding-nested/Foo.svelte
similarity index 71%
rename from test/runtime/samples/component-binding-nested/Foo.html
rename to test/runtime/samples/component-binding-nested/Foo.svelte
index 500480eae6..4a3e59afe7 100644
--- a/test/runtime/samples/component-binding-nested/Foo.html
+++ b/test/runtime/samples/component-binding-nested/Foo.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Bar from './Bar.html';
+	import Bar from './Bar.svelte';
 
 	export let x;
 </script>
diff --git a/test/runtime/samples/component-binding-nested/main.html b/test/runtime/samples/component-binding-nested/main.svelte
similarity index 52%
rename from test/runtime/samples/component-binding-nested/main.html
rename to test/runtime/samples/component-binding-nested/main.svelte
index cae8f4dc52..18f96b310c 100644
--- a/test/runtime/samples/component-binding-nested/main.html
+++ b/test/runtime/samples/component-binding-nested/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 
 	export let x;
 </script>
diff --git a/test/runtime/samples/component-binding-parent-supercedes-child-b/Bar.html b/test/runtime/samples/component-binding-parent-supercedes-child-b/Bar.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-parent-supercedes-child-b/Bar.html
rename to test/runtime/samples/component-binding-parent-supercedes-child-b/Bar.svelte
diff --git a/test/runtime/samples/component-binding-parent-supercedes-child-b/Foo.html b/test/runtime/samples/component-binding-parent-supercedes-child-b/Foo.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-parent-supercedes-child-b/Foo.html
rename to test/runtime/samples/component-binding-parent-supercedes-child-b/Foo.svelte
diff --git a/test/runtime/samples/component-binding-parent-supercedes-child-b/main.html b/test/runtime/samples/component-binding-parent-supercedes-child-b/main.svelte
similarity index 55%
rename from test/runtime/samples/component-binding-parent-supercedes-child-b/main.html
rename to test/runtime/samples/component-binding-parent-supercedes-child-b/main.svelte
index aaad9eb2fe..e6edf3b1f7 100644
--- a/test/runtime/samples/component-binding-parent-supercedes-child-b/main.html
+++ b/test/runtime/samples/component-binding-parent-supercedes-child-b/main.svelte
@@ -1,6 +1,6 @@
 <script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
 
 	export let a = true;
 	export let x;
diff --git a/test/runtime/samples/component-binding-parent-supercedes-child-c/Bar.html b/test/runtime/samples/component-binding-parent-supercedes-child-c/Bar.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-parent-supercedes-child-c/Bar.html
rename to test/runtime/samples/component-binding-parent-supercedes-child-c/Bar.svelte
diff --git a/test/runtime/samples/component-binding-parent-supercedes-child-c/Foo.html b/test/runtime/samples/component-binding-parent-supercedes-child-c/Foo.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-parent-supercedes-child-c/Foo.html
rename to test/runtime/samples/component-binding-parent-supercedes-child-c/Foo.svelte
diff --git a/test/runtime/samples/component-binding-parent-supercedes-child-c/main.html b/test/runtime/samples/component-binding-parent-supercedes-child-c/main.svelte
similarity index 55%
rename from test/runtime/samples/component-binding-parent-supercedes-child-c/main.html
rename to test/runtime/samples/component-binding-parent-supercedes-child-c/main.svelte
index ffc5bd188d..426ef04bad 100644
--- a/test/runtime/samples/component-binding-parent-supercedes-child-c/main.html
+++ b/test/runtime/samples/component-binding-parent-supercedes-child-c/main.svelte
@@ -1,6 +1,6 @@
 <script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
 
 	export let a = true;
 	export let x;
diff --git a/test/runtime/samples/component-binding-parent-supercedes-child/Counter.html b/test/runtime/samples/component-binding-parent-supercedes-child/Counter.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-parent-supercedes-child/Counter.html
rename to test/runtime/samples/component-binding-parent-supercedes-child/Counter.svelte
diff --git a/test/runtime/samples/component-binding-parent-supercedes-child/main.html b/test/runtime/samples/component-binding-parent-supercedes-child/main.svelte
similarity index 53%
rename from test/runtime/samples/component-binding-parent-supercedes-child/main.html
rename to test/runtime/samples/component-binding-parent-supercedes-child/main.svelte
index c874b270d0..e38b72daae 100644
--- a/test/runtime/samples/component-binding-parent-supercedes-child/main.html
+++ b/test/runtime/samples/component-binding-parent-supercedes-child/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Counter from './Counter.html';
+	import Counter from './Counter.svelte';
 
 	export let x = 10;
 </script>
diff --git a/test/runtime/samples/component-binding-private-state/Bar.html b/test/runtime/samples/component-binding-private-state/Bar.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-private-state/Bar.html
rename to test/runtime/samples/component-binding-private-state/Bar.svelte
diff --git a/test/runtime/samples/component-binding-private-state/Foo.html b/test/runtime/samples/component-binding-private-state/Foo.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-private-state/Foo.html
rename to test/runtime/samples/component-binding-private-state/Foo.svelte
diff --git a/test/runtime/samples/component-binding-private-state/main.html b/test/runtime/samples/component-binding-private-state/main.svelte
similarity index 55%
rename from test/runtime/samples/component-binding-private-state/main.html
rename to test/runtime/samples/component-binding-private-state/main.svelte
index ffc5bd188d..426ef04bad 100644
--- a/test/runtime/samples/component-binding-private-state/main.html
+++ b/test/runtime/samples/component-binding-private-state/main.svelte
@@ -1,6 +1,6 @@
 <script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
 
 	export let a = true;
 	export let x;
diff --git a/test/runtime/samples/component-binding-self-destroying/Nested.html b/test/runtime/samples/component-binding-self-destroying/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-binding-self-destroying/Nested.html
rename to test/runtime/samples/component-binding-self-destroying/Nested.svelte
diff --git a/test/runtime/samples/component-binding-self-destroying/main.html b/test/runtime/samples/component-binding-self-destroying/main.svelte
similarity index 75%
rename from test/runtime/samples/component-binding-self-destroying/main.html
rename to test/runtime/samples/component-binding-self-destroying/main.svelte
index 66b578f9bc..7043a52ad4 100644
--- a/test/runtime/samples/component-binding-self-destroying/main.html
+++ b/test/runtime/samples/component-binding-self-destroying/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 	export let show;
 </script>
 
diff --git a/test/runtime/samples/component-binding/Counter.html b/test/runtime/samples/component-binding/Counter.svelte
similarity index 100%
rename from test/runtime/samples/component-binding/Counter.html
rename to test/runtime/samples/component-binding/Counter.svelte
diff --git a/test/runtime/samples/component-binding/main.html b/test/runtime/samples/component-binding/main.svelte
similarity index 51%
rename from test/runtime/samples/component-binding/main.html
rename to test/runtime/samples/component-binding/main.svelte
index 5639d47eb1..3a582fe7bd 100644
--- a/test/runtime/samples/component-binding/main.html
+++ b/test/runtime/samples/component-binding/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Counter from './Counter.html';
+	import Counter from './Counter.svelte';
 
 	export let x;
 </script>
diff --git a/test/runtime/samples/component-data-dynamic-late/Widget.html b/test/runtime/samples/component-data-dynamic-late/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-data-dynamic-late/Widget.html
rename to test/runtime/samples/component-data-dynamic-late/Widget.svelte
diff --git a/test/runtime/samples/component-data-dynamic-late/main.html b/test/runtime/samples/component-data-dynamic-late/main.svelte
similarity index 67%
rename from test/runtime/samples/component-data-dynamic-late/main.html
rename to test/runtime/samples/component-data-dynamic-late/main.svelte
index 4c07837598..4e11d151cf 100644
--- a/test/runtime/samples/component-data-dynamic-late/main.html
+++ b/test/runtime/samples/component-data-dynamic-late/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let foo = false;
 	export let q;
diff --git a/test/runtime/samples/component-data-dynamic-shorthand/Widget.html b/test/runtime/samples/component-data-dynamic-shorthand/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-data-dynamic-shorthand/Widget.html
rename to test/runtime/samples/component-data-dynamic-shorthand/Widget.svelte
diff --git a/test/runtime/samples/component-data-dynamic-shorthand/main.html b/test/runtime/samples/component-data-dynamic-shorthand/main.svelte
similarity index 57%
rename from test/runtime/samples/component-data-dynamic-shorthand/main.html
rename to test/runtime/samples/component-data-dynamic-shorthand/main.svelte
index c6359fbc25..6245b9064b 100644
--- a/test/runtime/samples/component-data-dynamic-shorthand/main.html
+++ b/test/runtime/samples/component-data-dynamic-shorthand/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let foo;
 </script>
diff --git a/test/runtime/samples/component-data-dynamic/Widget.html b/test/runtime/samples/component-data-dynamic/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-data-dynamic/Widget.html
rename to test/runtime/samples/component-data-dynamic/Widget.svelte
diff --git a/test/runtime/samples/component-data-dynamic/main.html b/test/runtime/samples/component-data-dynamic/main.svelte
similarity index 80%
rename from test/runtime/samples/component-data-dynamic/main.html
rename to test/runtime/samples/component-data-dynamic/main.svelte
index 7c796ca9b6..42ef74a185 100644
--- a/test/runtime/samples/component-data-dynamic/main.html
+++ b/test/runtime/samples/component-data-dynamic/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let bar;
 	export let x;
diff --git a/test/runtime/samples/component-data-empty/Widget.html b/test/runtime/samples/component-data-empty/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-data-empty/Widget.html
rename to test/runtime/samples/component-data-empty/Widget.svelte
diff --git a/test/runtime/samples/component-data-empty/main.html b/test/runtime/samples/component-data-empty/main.html
deleted file mode 100644
index 3989cd2319..0000000000
--- a/test/runtime/samples/component-data-empty/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-</script>
-
-<div>
-	<Widget foo=''/>
-</div>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-empty/main.svelte b/test/runtime/samples/component-data-empty/main.svelte
new file mode 100644
index 0000000000..be6a137e8a
--- /dev/null
+++ b/test/runtime/samples/component-data-empty/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Widget from './Widget.svelte';
+</script>
+
+<div>
+	<Widget foo=''/>
+</div>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-static-boolean-regression/Link.html b/test/runtime/samples/component-data-static-boolean-regression/Link.svelte
similarity index 100%
rename from test/runtime/samples/component-data-static-boolean-regression/Link.html
rename to test/runtime/samples/component-data-static-boolean-regression/Link.svelte
diff --git a/test/runtime/samples/component-data-static-boolean-regression/main.html b/test/runtime/samples/component-data-static-boolean-regression/main.html
deleted file mode 100644
index 8207fef20e..0000000000
--- a/test/runtime/samples/component-data-static-boolean-regression/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Link from './Link.html';
-</script>
-
-<Link x href="/cool"/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-static-boolean-regression/main.svelte b/test/runtime/samples/component-data-static-boolean-regression/main.svelte
new file mode 100644
index 0000000000..492d1dc78a
--- /dev/null
+++ b/test/runtime/samples/component-data-static-boolean-regression/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Link from './Link.svelte';
+</script>
+
+<Link x href="/cool"/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-static-boolean/Foo.html b/test/runtime/samples/component-data-static-boolean/Foo.svelte
similarity index 100%
rename from test/runtime/samples/component-data-static-boolean/Foo.html
rename to test/runtime/samples/component-data-static-boolean/Foo.svelte
diff --git a/test/runtime/samples/component-data-static-boolean/main.html b/test/runtime/samples/component-data-static-boolean/main.html
deleted file mode 100644
index cfaef9dea3..0000000000
--- a/test/runtime/samples/component-data-static-boolean/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Foo from './Foo.html';
-</script>
-
-<Foo x/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-static-boolean/main.svelte b/test/runtime/samples/component-data-static-boolean/main.svelte
new file mode 100644
index 0000000000..edb8e749af
--- /dev/null
+++ b/test/runtime/samples/component-data-static-boolean/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Foo from './Foo.svelte';
+</script>
+
+<Foo x/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-static/Widget.html b/test/runtime/samples/component-data-static/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-data-static/Widget.html
rename to test/runtime/samples/component-data-static/Widget.svelte
diff --git a/test/runtime/samples/component-data-static/main.html b/test/runtime/samples/component-data-static/main.svelte
similarity index 55%
rename from test/runtime/samples/component-data-static/main.html
rename to test/runtime/samples/component-data-static/main.svelte
index ec8e37c45e..b116b262a0 100644
--- a/test/runtime/samples/component-data-static/main.html
+++ b/test/runtime/samples/component-data-static/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 <div>
diff --git a/test/runtime/samples/component-event-not-stale/Button.html b/test/runtime/samples/component-event-not-stale/Button.svelte
similarity index 100%
rename from test/runtime/samples/component-event-not-stale/Button.html
rename to test/runtime/samples/component-event-not-stale/Button.svelte
diff --git a/test/runtime/samples/component-event-not-stale/main.html b/test/runtime/samples/component-event-not-stale/main.svelte
similarity index 88%
rename from test/runtime/samples/component-event-not-stale/main.html
rename to test/runtime/samples/component-event-not-stale/main.svelte
index 1beacd0e2d..0b2ab2c1ee 100644
--- a/test/runtime/samples/component-event-not-stale/main.html
+++ b/test/runtime/samples/component-event-not-stale/main.svelte
@@ -1,6 +1,6 @@
 <script>
 	import { createEventDispatcher } from 'svelte';
-	import Button from './Button.html';
+	import Button from './Button.svelte';
 
 	const dispatch = createEventDispatcher();
 
diff --git a/test/runtime/samples/component-events-console/Widget.html b/test/runtime/samples/component-events-console/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-events-console/Widget.html
rename to test/runtime/samples/component-events-console/Widget.svelte
diff --git a/test/runtime/samples/component-events-console/main.html b/test/runtime/samples/component-events-console/main.html
deleted file mode 100644
index 7b0c3fccda..0000000000
--- a/test/runtime/samples/component-events-console/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-</script>
-
-<Widget on:click="{() => console.log('clicked')}"/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-events-console/main.svelte b/test/runtime/samples/component-events-console/main.svelte
new file mode 100644
index 0000000000..fba004b4eb
--- /dev/null
+++ b/test/runtime/samples/component-events-console/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Widget from './Widget.svelte';
+</script>
+
+<Widget on:click="{() => console.log('clicked')}"/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-events-data/Widget.html b/test/runtime/samples/component-events-data/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-events-data/Widget.html
rename to test/runtime/samples/component-events-data/Widget.svelte
diff --git a/test/runtime/samples/component-events-data/main.html b/test/runtime/samples/component-events-data/main.svelte
similarity index 81%
rename from test/runtime/samples/component-events-data/main.html
rename to test/runtime/samples/component-events-data/main.svelte
index 5661404a46..ea44594ccd 100644
--- a/test/runtime/samples/component-events-data/main.html
+++ b/test/runtime/samples/component-events-data/main.svelte
@@ -1,6 +1,6 @@
 <script>
 	import { createEventDispatcher } from 'svelte';
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	const dispatch = createEventDispatcher();
 </script>
diff --git a/test/runtime/samples/component-events-each/Widget.html b/test/runtime/samples/component-events-each/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-events-each/Widget.html
rename to test/runtime/samples/component-events-each/Widget.svelte
diff --git a/test/runtime/samples/component-events-each/main.html b/test/runtime/samples/component-events-each/main.svelte
similarity index 85%
rename from test/runtime/samples/component-events-each/main.html
rename to test/runtime/samples/component-events-each/main.svelte
index 4a5a694172..f229873431 100644
--- a/test/runtime/samples/component-events-each/main.html
+++ b/test/runtime/samples/component-events-each/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 	import { createEventDispatcher } from 'svelte';
 
 	const dispatch = createEventDispatcher();
diff --git a/test/runtime/samples/component-events/Widget.html b/test/runtime/samples/component-events/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-events/Widget.html
rename to test/runtime/samples/component-events/Widget.svelte
diff --git a/test/runtime/samples/component-events/main.html b/test/runtime/samples/component-events/main.svelte
similarity index 83%
rename from test/runtime/samples/component-events/main.html
rename to test/runtime/samples/component-events/main.svelte
index fc4839e027..ad33261456 100644
--- a/test/runtime/samples/component-events/main.html
+++ b/test/runtime/samples/component-events/main.svelte
@@ -1,6 +1,6 @@
 <script>
 	import { createEventDispatcher } from 'svelte';
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	const dispatch = createEventDispatcher();
 
diff --git a/test/runtime/samples/component-if-placement/Component.html b/test/runtime/samples/component-if-placement/Component.svelte
similarity index 100%
rename from test/runtime/samples/component-if-placement/Component.html
rename to test/runtime/samples/component-if-placement/Component.svelte
diff --git a/test/runtime/samples/component-if-placement/main.html b/test/runtime/samples/component-if-placement/main.svelte
similarity index 63%
rename from test/runtime/samples/component-if-placement/main.html
rename to test/runtime/samples/component-if-placement/main.svelte
index 175feeb6b5..f9e65b9d3b 100644
--- a/test/runtime/samples/component-if-placement/main.html
+++ b/test/runtime/samples/component-if-placement/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Component from './Component.html';
+	import Component from './Component.svelte';
 	export let flag;
 </script>
 
diff --git a/test/runtime/samples/component-name-deconflicted/Nested.html b/test/runtime/samples/component-name-deconflicted/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-name-deconflicted/Nested.html
rename to test/runtime/samples/component-name-deconflicted/Nested.svelte
diff --git a/test/runtime/samples/component-name-deconflicted/main.html b/test/runtime/samples/component-name-deconflicted/main.svelte
similarity index 70%
rename from test/runtime/samples/component-name-deconflicted/main.html
rename to test/runtime/samples/component-name-deconflicted/main.svelte
index 03d43c357b..1649ad0a7d 100644
--- a/test/runtime/samples/component-name-deconflicted/main.html
+++ b/test/runtime/samples/component-name-deconflicted/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let list = [1, 2];
 </script>
diff --git a/test/runtime/samples/component-nested-deep/Level1.html b/test/runtime/samples/component-nested-deep/Level1.html
deleted file mode 100644
index 246bc4dfb7..0000000000
--- a/test/runtime/samples/component-nested-deep/Level1.html
+++ /dev/null
@@ -1,8 +0,0 @@
-<script>
-	import Level2 from './Level2.html';
-	import Level3 from './Level3.html';
-</script>
-
-<Level2>
-	<Level3 />
-</Level2>
\ No newline at end of file
diff --git a/test/runtime/samples/component-nested-deep/Level1.svelte b/test/runtime/samples/component-nested-deep/Level1.svelte
new file mode 100644
index 0000000000..1889fa2bd0
--- /dev/null
+++ b/test/runtime/samples/component-nested-deep/Level1.svelte
@@ -0,0 +1,8 @@
+<script>
+	import Level2 from './Level2.svelte';
+	import Level3 from './Level3.svelte';
+</script>
+
+<Level2>
+	<Level3 />
+</Level2>
\ No newline at end of file
diff --git a/test/runtime/samples/component-nested-deep/Level2.html b/test/runtime/samples/component-nested-deep/Level2.html
deleted file mode 100644
index 4b992b5cb3..0000000000
--- a/test/runtime/samples/component-nested-deep/Level2.html
+++ /dev/null
@@ -1,6 +0,0 @@
-<script>
-	import Level3 from './Level3.html';
-</script>
-
-<span>level 2</span>
-<slot></slot>
\ No newline at end of file
diff --git a/test/runtime/samples/component-nested-deep/Level2.svelte b/test/runtime/samples/component-nested-deep/Level2.svelte
new file mode 100644
index 0000000000..500c4c9887
--- /dev/null
+++ b/test/runtime/samples/component-nested-deep/Level2.svelte
@@ -0,0 +1,6 @@
+<script>
+	import Level3 from './Level3.svelte';
+</script>
+
+<span>level 2</span>
+<slot></slot>
\ No newline at end of file
diff --git a/test/runtime/samples/component-nested-deep/Level3.html b/test/runtime/samples/component-nested-deep/Level3.svelte
similarity index 100%
rename from test/runtime/samples/component-nested-deep/Level3.html
rename to test/runtime/samples/component-nested-deep/Level3.svelte
diff --git a/test/runtime/samples/component-nested-deep/main.html b/test/runtime/samples/component-nested-deep/main.html
deleted file mode 100644
index 57e4fc02b1..0000000000
--- a/test/runtime/samples/component-nested-deep/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Level1 from './Level1.html';
-
-	export let l1;
-</script>
-
-<Level1 bind:this={l1} />
\ No newline at end of file
diff --git a/test/runtime/samples/component-nested-deep/main.svelte b/test/runtime/samples/component-nested-deep/main.svelte
new file mode 100644
index 0000000000..a7007e27ea
--- /dev/null
+++ b/test/runtime/samples/component-nested-deep/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Level1 from './Level1.svelte';
+
+	export let l1;
+</script>
+
+<Level1 bind:this={l1} />
\ No newline at end of file
diff --git a/test/runtime/samples/component-nested-deeper/Level1.html b/test/runtime/samples/component-nested-deeper/Level1.svelte
similarity index 74%
rename from test/runtime/samples/component-nested-deeper/Level1.html
rename to test/runtime/samples/component-nested-deeper/Level1.svelte
index 273e1b61c8..887782f121 100644
--- a/test/runtime/samples/component-nested-deeper/Level1.html
+++ b/test/runtime/samples/component-nested-deeper/Level1.svelte
@@ -1,6 +1,6 @@
 <script>
-	import Level2 from './Level2.html';
-	import Level3 from './Level3.html';
+	import Level2 from './Level2.svelte';
+	import Level3 from './Level3.svelte';
 	
 	export let values;
 </script>
diff --git a/test/runtime/samples/component-nested-deeper/Level2.html b/test/runtime/samples/component-nested-deeper/Level2.svelte
similarity index 100%
rename from test/runtime/samples/component-nested-deeper/Level2.html
rename to test/runtime/samples/component-nested-deeper/Level2.svelte
diff --git a/test/runtime/samples/component-nested-deeper/Level3.html b/test/runtime/samples/component-nested-deeper/Level3.svelte
similarity index 100%
rename from test/runtime/samples/component-nested-deeper/Level3.html
rename to test/runtime/samples/component-nested-deeper/Level3.svelte
diff --git a/test/runtime/samples/component-nested-deeper/main.html b/test/runtime/samples/component-nested-deeper/main.html
deleted file mode 100644
index 4c72ae6743..0000000000
--- a/test/runtime/samples/component-nested-deeper/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Level1 from './Level1.html';
-	
-	export let values;
-</script>
-
-<Level1 {values}/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-nested-deeper/main.svelte b/test/runtime/samples/component-nested-deeper/main.svelte
new file mode 100644
index 0000000000..a1a6ff0de5
--- /dev/null
+++ b/test/runtime/samples/component-nested-deeper/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Level1 from './Level1.svelte';
+	
+	export let values;
+</script>
+
+<Level1 {values}/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-not-void/Link.html b/test/runtime/samples/component-not-void/Link.svelte
similarity index 100%
rename from test/runtime/samples/component-not-void/Link.html
rename to test/runtime/samples/component-not-void/Link.svelte
diff --git a/test/runtime/samples/component-not-void/main.html b/test/runtime/samples/component-not-void/main.html
deleted file mode 100644
index 0769c81092..0000000000
--- a/test/runtime/samples/component-not-void/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Link from './Link.html';
-</script>
-
-<Link>Hello</Link>
\ No newline at end of file
diff --git a/test/runtime/samples/component-not-void/main.svelte b/test/runtime/samples/component-not-void/main.svelte
new file mode 100644
index 0000000000..836777832b
--- /dev/null
+++ b/test/runtime/samples/component-not-void/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Link from './Link.svelte';
+</script>
+
+<Link>Hello</Link>
\ No newline at end of file
diff --git a/test/runtime/samples/component-ref/Widget.html b/test/runtime/samples/component-ref/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-ref/Widget.html
rename to test/runtime/samples/component-ref/Widget.svelte
diff --git a/test/runtime/samples/component-ref/main.html b/test/runtime/samples/component-ref/main.svelte
similarity index 62%
rename from test/runtime/samples/component-ref/main.html
rename to test/runtime/samples/component-ref/main.svelte
index a91173c5af..1f51727c76 100644
--- a/test/runtime/samples/component-ref/main.html
+++ b/test/runtime/samples/component-ref/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 	export let widget;
 </script>
 
diff --git a/test/runtime/samples/component-shorthand-import/Widget.html b/test/runtime/samples/component-shorthand-import/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-shorthand-import/Widget.html
rename to test/runtime/samples/component-shorthand-import/Widget.svelte
diff --git a/test/runtime/samples/component-shorthand-import/main.html b/test/runtime/samples/component-shorthand-import/main.html
deleted file mode 100644
index cbcde3f1ed..0000000000
--- a/test/runtime/samples/component-shorthand-import/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-</script>
-
-<Widget/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-shorthand-import/main.svelte b/test/runtime/samples/component-shorthand-import/main.svelte
new file mode 100644
index 0000000000..0a9d5bba87
--- /dev/null
+++ b/test/runtime/samples/component-shorthand-import/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Widget from './Widget.svelte';
+</script>
+
+<Widget/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-default/Nested.html b/test/runtime/samples/component-slot-default/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-default/Nested.html
rename to test/runtime/samples/component-slot-default/Nested.svelte
diff --git a/test/runtime/samples/component-slot-default/main.html b/test/runtime/samples/component-slot-default/main.html
deleted file mode 100644
index 06a1f64cae..0000000000
--- a/test/runtime/samples/component-slot-default/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Nested from './Nested.html';
-</script>
-
-<Nested>
-	Hello
-</Nested>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-default/main.svelte b/test/runtime/samples/component-slot-default/main.svelte
new file mode 100644
index 0000000000..1e1ea8daa8
--- /dev/null
+++ b/test/runtime/samples/component-slot-default/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Nested from './Nested.svelte';
+</script>
+
+<Nested>
+	Hello
+</Nested>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-dynamic/Nested.html b/test/runtime/samples/component-slot-dynamic/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-dynamic/Nested.html
rename to test/runtime/samples/component-slot-dynamic/Nested.svelte
diff --git a/test/runtime/samples/component-slot-dynamic/main.html b/test/runtime/samples/component-slot-dynamic/main.svelte
similarity index 67%
rename from test/runtime/samples/component-slot-dynamic/main.html
rename to test/runtime/samples/component-slot-dynamic/main.svelte
index ad952b38bb..8eb876444a 100644
--- a/test/runtime/samples/component-slot-dynamic/main.html
+++ b/test/runtime/samples/component-slot-dynamic/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let nested;
 </script>
diff --git a/test/runtime/samples/component-slot-each-block/Nested.html b/test/runtime/samples/component-slot-each-block/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-each-block/Nested.html
rename to test/runtime/samples/component-slot-each-block/Nested.svelte
diff --git a/test/runtime/samples/component-slot-each-block/main.html b/test/runtime/samples/component-slot-each-block/main.svelte
similarity index 69%
rename from test/runtime/samples/component-slot-each-block/main.html
rename to test/runtime/samples/component-slot-each-block/main.svelte
index 911eb5c1ae..986c5c40e1 100644
--- a/test/runtime/samples/component-slot-each-block/main.html
+++ b/test/runtime/samples/component-slot-each-block/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let things;
 </script>
diff --git a/test/runtime/samples/component-slot-empty/Nested.html b/test/runtime/samples/component-slot-empty/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-empty/Nested.html
rename to test/runtime/samples/component-slot-empty/Nested.svelte
diff --git a/test/runtime/samples/component-slot-empty/main.html b/test/runtime/samples/component-slot-empty/main.html
deleted file mode 100644
index 3d76b0a696..0000000000
--- a/test/runtime/samples/component-slot-empty/main.html
+++ /dev/null
@@ -1,6 +0,0 @@
-<script>
-	import Nested from './Nested.html';
-</script>
-
-<Nested>
-</Nested>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-empty/main.svelte b/test/runtime/samples/component-slot-empty/main.svelte
new file mode 100644
index 0000000000..619060e4cb
--- /dev/null
+++ b/test/runtime/samples/component-slot-empty/main.svelte
@@ -0,0 +1,6 @@
+<script>
+	import Nested from './Nested.svelte';
+</script>
+
+<Nested>
+</Nested>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-fallback/Nested.html b/test/runtime/samples/component-slot-fallback/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-fallback/Nested.html
rename to test/runtime/samples/component-slot-fallback/Nested.svelte
diff --git a/test/runtime/samples/component-slot-fallback/main.html b/test/runtime/samples/component-slot-fallback/main.svelte
similarity index 51%
rename from test/runtime/samples/component-slot-fallback/main.html
rename to test/runtime/samples/component-slot-fallback/main.svelte
index f4d609216c..0bdb6f8b1d 100644
--- a/test/runtime/samples/component-slot-fallback/main.html
+++ b/test/runtime/samples/component-slot-fallback/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <Nested>
diff --git a/test/runtime/samples/component-slot-if-block-before-node/Nested.html b/test/runtime/samples/component-slot-if-block-before-node/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-if-block-before-node/Nested.html
rename to test/runtime/samples/component-slot-if-block-before-node/Nested.svelte
diff --git a/test/runtime/samples/component-slot-if-block/main.html b/test/runtime/samples/component-slot-if-block-before-node/main.svelte
similarity index 69%
rename from test/runtime/samples/component-slot-if-block/main.html
rename to test/runtime/samples/component-slot-if-block-before-node/main.svelte
index 2b0405a471..6e51f27649 100644
--- a/test/runtime/samples/component-slot-if-block/main.html
+++ b/test/runtime/samples/component-slot-if-block-before-node/main.svelte
@@ -1,13 +1,13 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let foo;
 </script>
 
 <Nested>
-	<p>unconditional</p>
-
 	{#if foo}
 		<p>conditional</p>
 	{/if}
+
+	<p>unconditional</p>
 </Nested>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-if-block/Nested.html b/test/runtime/samples/component-slot-if-block/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-if-block/Nested.html
rename to test/runtime/samples/component-slot-if-block/Nested.svelte
diff --git a/test/runtime/samples/component-slot-if-block-before-node/main.html b/test/runtime/samples/component-slot-if-block/main.svelte
similarity index 69%
rename from test/runtime/samples/component-slot-if-block-before-node/main.html
rename to test/runtime/samples/component-slot-if-block/main.svelte
index 01ea1e8455..465da320a9 100644
--- a/test/runtime/samples/component-slot-if-block-before-node/main.html
+++ b/test/runtime/samples/component-slot-if-block/main.svelte
@@ -1,13 +1,13 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let foo;
 </script>
 
 <Nested>
+	<p>unconditional</p>
+
 	{#if foo}
 		<p>conditional</p>
 	{/if}
-
-	<p>unconditional</p>
 </Nested>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-if-else-block-before-node/Nested.html b/test/runtime/samples/component-slot-if-else-block-before-node/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-if-else-block-before-node/Nested.html
rename to test/runtime/samples/component-slot-if-else-block-before-node/Nested.svelte
diff --git a/test/runtime/samples/component-slot-if-else-block-before-node/main.html b/test/runtime/samples/component-slot-if-else-block-before-node/main.svelte
similarity index 74%
rename from test/runtime/samples/component-slot-if-else-block-before-node/main.html
rename to test/runtime/samples/component-slot-if-else-block-before-node/main.svelte
index 684497b98a..0b24f77b16 100644
--- a/test/runtime/samples/component-slot-if-else-block-before-node/main.html
+++ b/test/runtime/samples/component-slot-if-else-block-before-node/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let enabled;
 </script>
diff --git a/test/runtime/samples/component-slot-let-aliased/Nested.html b/test/runtime/samples/component-slot-let-aliased/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-let-aliased/Nested.html
rename to test/runtime/samples/component-slot-let-aliased/Nested.svelte
diff --git a/test/runtime/samples/component-slot-let-aliased/main.html b/test/runtime/samples/component-slot-let-aliased/main.svelte
similarity index 65%
rename from test/runtime/samples/component-slot-let-aliased/main.html
rename to test/runtime/samples/component-slot-let-aliased/main.svelte
index 1acb7fbcdc..468a58face 100644
--- a/test/runtime/samples/component-slot-let-aliased/main.html
+++ b/test/runtime/samples/component-slot-let-aliased/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let things;
 </script>
diff --git a/test/runtime/samples/component-slot-let-b/Nested.html b/test/runtime/samples/component-slot-let-b/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-let-b/Nested.html
rename to test/runtime/samples/component-slot-let-b/Nested.svelte
diff --git a/test/runtime/samples/component-slot-let-b/main.html b/test/runtime/samples/component-slot-let-b/main.svelte
similarity index 55%
rename from test/runtime/samples/component-slot-let-b/main.html
rename to test/runtime/samples/component-slot-let-b/main.svelte
index b4fd5f54c6..4acec62b21 100644
--- a/test/runtime/samples/component-slot-let-b/main.html
+++ b/test/runtime/samples/component-slot-let-b/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <Nested let:count>
diff --git a/test/runtime/samples/component-slot-let-c/Nested.html b/test/runtime/samples/component-slot-let-c/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-let-c/Nested.html
rename to test/runtime/samples/component-slot-let-c/Nested.svelte
diff --git a/test/runtime/samples/component-slot-let-c/main.html b/test/runtime/samples/component-slot-let-c/main.svelte
similarity index 60%
rename from test/runtime/samples/component-slot-let-c/main.html
rename to test/runtime/samples/component-slot-let-c/main.svelte
index b834fd8790..b594964303 100644
--- a/test/runtime/samples/component-slot-let-c/main.html
+++ b/test/runtime/samples/component-slot-let-c/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <Nested let:c let:count>
diff --git a/test/runtime/samples/component-slot-let-destructured/Nested.html b/test/runtime/samples/component-slot-let-destructured/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-let-destructured/Nested.html
rename to test/runtime/samples/component-slot-let-destructured/Nested.svelte
diff --git a/test/runtime/samples/component-slot-let-destructured/main.html b/test/runtime/samples/component-slot-let-destructured/main.svelte
similarity index 67%
rename from test/runtime/samples/component-slot-let-destructured/main.html
rename to test/runtime/samples/component-slot-let-destructured/main.svelte
index 488fd463de..1ee93bf105 100644
--- a/test/runtime/samples/component-slot-let-destructured/main.html
+++ b/test/runtime/samples/component-slot-let-destructured/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let things;
 </script>
diff --git a/test/runtime/samples/component-slot-let-named/Nested.html b/test/runtime/samples/component-slot-let-named/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-let-named/Nested.html
rename to test/runtime/samples/component-slot-let-named/Nested.svelte
diff --git a/test/runtime/samples/component-slot-let-named/main.html b/test/runtime/samples/component-slot-let-named/main.svelte
similarity index 71%
rename from test/runtime/samples/component-slot-let-named/main.html
rename to test/runtime/samples/component-slot-let-named/main.svelte
index 1c3d3365c7..f9e9e3a10f 100644
--- a/test/runtime/samples/component-slot-let-named/main.html
+++ b/test/runtime/samples/component-slot-let-named/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let things;
 </script>
diff --git a/test/runtime/samples/component-slot-let-static/Nested.html b/test/runtime/samples/component-slot-let-static/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-let-static/Nested.html
rename to test/runtime/samples/component-slot-let-static/Nested.svelte
diff --git a/test/runtime/samples/component-slot-let-static/main.html b/test/runtime/samples/component-slot-let-static/main.svelte
similarity index 53%
rename from test/runtime/samples/component-slot-let-static/main.html
rename to test/runtime/samples/component-slot-let-static/main.svelte
index 6e91b0d026..3eeaba976e 100644
--- a/test/runtime/samples/component-slot-let-static/main.html
+++ b/test/runtime/samples/component-slot-let-static/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <Nested let:value>
diff --git a/test/runtime/samples/component-slot-let/Nested.html b/test/runtime/samples/component-slot-let/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-let/Nested.html
rename to test/runtime/samples/component-slot-let/Nested.svelte
diff --git a/test/runtime/samples/component-slot-let/main.html b/test/runtime/samples/component-slot-let/main.svelte
similarity index 65%
rename from test/runtime/samples/component-slot-let/main.html
rename to test/runtime/samples/component-slot-let/main.svelte
index 76d491389f..d00bb8e41e 100644
--- a/test/runtime/samples/component-slot-let/main.html
+++ b/test/runtime/samples/component-slot-let/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let things;
 </script>
diff --git a/test/runtime/samples/component-slot-name-with-hyphen/Nested.html b/test/runtime/samples/component-slot-name-with-hyphen/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-name-with-hyphen/Nested.html
rename to test/runtime/samples/component-slot-name-with-hyphen/Nested.svelte
diff --git a/test/runtime/samples/component-slot-name-with-hyphen/main.html b/test/runtime/samples/component-slot-name-with-hyphen/main.svelte
similarity index 54%
rename from test/runtime/samples/component-slot-name-with-hyphen/main.html
rename to test/runtime/samples/component-slot-name-with-hyphen/main.svelte
index a77e524f89..13a65b2196 100644
--- a/test/runtime/samples/component-slot-name-with-hyphen/main.html
+++ b/test/runtime/samples/component-slot-name-with-hyphen/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <Nested>
diff --git a/test/runtime/samples/component-slot-named/Nested.html b/test/runtime/samples/component-slot-named/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-named/Nested.html
rename to test/runtime/samples/component-slot-named/Nested.svelte
diff --git a/test/runtime/samples/component-slot-named/main.html b/test/runtime/samples/component-slot-named/main.svelte
similarity index 63%
rename from test/runtime/samples/component-slot-named/main.html
rename to test/runtime/samples/component-slot-named/main.svelte
index 627c3ab7e0..e25587c1e5 100644
--- a/test/runtime/samples/component-slot-named/main.html
+++ b/test/runtime/samples/component-slot-named/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <Nested>
diff --git a/test/runtime/samples/component-slot-nested-component/Inner.html b/test/runtime/samples/component-slot-nested-component/Inner.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-nested-component/Inner.html
rename to test/runtime/samples/component-slot-nested-component/Inner.svelte
diff --git a/test/runtime/samples/component-slot-nested-component/Outer.html b/test/runtime/samples/component-slot-nested-component/Outer.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-nested-component/Outer.html
rename to test/runtime/samples/component-slot-nested-component/Outer.svelte
diff --git a/test/runtime/samples/component-slot-nested-component/main.html b/test/runtime/samples/component-slot-nested-component/main.html
deleted file mode 100644
index d86e58bb70..0000000000
--- a/test/runtime/samples/component-slot-nested-component/main.html
+++ /dev/null
@@ -1,8 +0,0 @@
-<script>
-	import Outer from './Outer.html';
-	import Inner from './Inner.html';
-</script>
-
-<Outer>
-	<Inner>foo</Inner>
-</Outer>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-nested-component/main.svelte b/test/runtime/samples/component-slot-nested-component/main.svelte
new file mode 100644
index 0000000000..45c6d437b6
--- /dev/null
+++ b/test/runtime/samples/component-slot-nested-component/main.svelte
@@ -0,0 +1,8 @@
+<script>
+	import Outer from './Outer.svelte';
+	import Inner from './Inner.svelte';
+</script>
+
+<Outer>
+	<Inner>foo</Inner>
+</Outer>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-nested/Nested.html b/test/runtime/samples/component-slot-nested/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-nested/Nested.html
rename to test/runtime/samples/component-slot-nested/Nested.svelte
diff --git a/test/runtime/samples/component-slot-nested/main.html b/test/runtime/samples/component-slot-nested/main.svelte
similarity index 52%
rename from test/runtime/samples/component-slot-nested/main.html
rename to test/runtime/samples/component-slot-nested/main.svelte
index a109ec9c06..982a918709 100644
--- a/test/runtime/samples/component-slot-nested/main.html
+++ b/test/runtime/samples/component-slot-nested/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <Nested>
diff --git a/test/runtime/samples/component-slot-used-with-default-event/Nested.html b/test/runtime/samples/component-slot-used-with-default-event/Nested.svelte
similarity index 100%
rename from test/runtime/samples/component-slot-used-with-default-event/Nested.html
rename to test/runtime/samples/component-slot-used-with-default-event/Nested.svelte
diff --git a/test/runtime/samples/component-slot-used-with-default-event/main.html b/test/runtime/samples/component-slot-used-with-default-event/main.html
deleted file mode 100644
index 06a1f64cae..0000000000
--- a/test/runtime/samples/component-slot-used-with-default-event/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Nested from './Nested.html';
-</script>
-
-<Nested>
-	Hello
-</Nested>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-used-with-default-event/main.svelte b/test/runtime/samples/component-slot-used-with-default-event/main.svelte
new file mode 100644
index 0000000000..1e1ea8daa8
--- /dev/null
+++ b/test/runtime/samples/component-slot-used-with-default-event/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Nested from './Nested.svelte';
+</script>
+
+<Nested>
+	Hello
+</Nested>
\ No newline at end of file
diff --git a/test/runtime/samples/component-static-at-symbol/Email.html b/test/runtime/samples/component-static-at-symbol/Email.svelte
similarity index 100%
rename from test/runtime/samples/component-static-at-symbol/Email.html
rename to test/runtime/samples/component-static-at-symbol/Email.svelte
diff --git a/test/runtime/samples/component-static-at-symbol/main.html b/test/runtime/samples/component-static-at-symbol/main.html
deleted file mode 100644
index 275b922f6a..0000000000
--- a/test/runtime/samples/component-static-at-symbol/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Email from './Email.html';
-</script>
-
-<Email address='hello@example.com'/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-static-at-symbol/main.svelte b/test/runtime/samples/component-static-at-symbol/main.svelte
new file mode 100644
index 0000000000..39f82ffd25
--- /dev/null
+++ b/test/runtime/samples/component-static-at-symbol/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Email from './Email.svelte';
+</script>
+
+<Email address='hello@example.com'/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-template-inline-mutation/Widget.html b/test/runtime/samples/component-template-inline-mutation/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-template-inline-mutation/Widget.html
rename to test/runtime/samples/component-template-inline-mutation/Widget.svelte
diff --git a/test/runtime/samples/component-template-inline-mutation/main.html b/test/runtime/samples/component-template-inline-mutation/main.html
deleted file mode 100644
index f094aef743..0000000000
--- a/test/runtime/samples/component-template-inline-mutation/main.html
+++ /dev/null
@@ -1,6 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-</script>
-
-<Widget />
-<Widget />
\ No newline at end of file
diff --git a/test/runtime/samples/component-template-inline-mutation/main.svelte b/test/runtime/samples/component-template-inline-mutation/main.svelte
new file mode 100644
index 0000000000..b77462c690
--- /dev/null
+++ b/test/runtime/samples/component-template-inline-mutation/main.svelte
@@ -0,0 +1,6 @@
+<script>
+	import Widget from './Widget.svelte';
+</script>
+
+<Widget />
+<Widget />
\ No newline at end of file
diff --git a/test/runtime/samples/component-yield-follows-element/Foo.html b/test/runtime/samples/component-yield-follows-element/Foo.svelte
similarity index 100%
rename from test/runtime/samples/component-yield-follows-element/Foo.html
rename to test/runtime/samples/component-yield-follows-element/Foo.svelte
diff --git a/test/runtime/samples/component-yield-follows-element/main.html b/test/runtime/samples/component-yield-follows-element/main.html
deleted file mode 100644
index b362e9a410..0000000000
--- a/test/runtime/samples/component-yield-follows-element/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Foo from './Foo.html';
-</script>
-
-<Foo>test</Foo>
\ No newline at end of file
diff --git a/test/runtime/samples/component-yield-follows-element/main.svelte b/test/runtime/samples/component-yield-follows-element/main.svelte
new file mode 100644
index 0000000000..3a43b58231
--- /dev/null
+++ b/test/runtime/samples/component-yield-follows-element/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Foo from './Foo.svelte';
+</script>
+
+<Foo>test</Foo>
\ No newline at end of file
diff --git a/test/runtime/samples/component-yield-if/Widget.html b/test/runtime/samples/component-yield-if/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-yield-if/Widget.html
rename to test/runtime/samples/component-yield-if/Widget.svelte
diff --git a/test/runtime/samples/component-yield-if/main.html b/test/runtime/samples/component-yield-if/main.svelte
similarity index 72%
rename from test/runtime/samples/component-yield-if/main.html
rename to test/runtime/samples/component-yield-if/main.svelte
index 768993e064..4e02155a8b 100644
--- a/test/runtime/samples/component-yield-if/main.html
+++ b/test/runtime/samples/component-yield-if/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let widget;
 	export let data = "Hello";
diff --git a/test/runtime/samples/component-yield-multiple-in-each/Widget.html b/test/runtime/samples/component-yield-multiple-in-each/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-yield-multiple-in-each/Widget.html
rename to test/runtime/samples/component-yield-multiple-in-each/Widget.svelte
diff --git a/test/runtime/samples/component-yield-multiple-in-each/main.html b/test/runtime/samples/component-yield-multiple-in-each/main.svelte
similarity index 74%
rename from test/runtime/samples/component-yield-multiple-in-each/main.html
rename to test/runtime/samples/component-yield-multiple-in-each/main.svelte
index 5f2027ee98..d41424e9b7 100644
--- a/test/runtime/samples/component-yield-multiple-in-each/main.html
+++ b/test/runtime/samples/component-yield-multiple-in-each/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let people = [ 'Alice', 'Bob', 'Charles' ];
 </script>
diff --git a/test/runtime/samples/component-yield-multiple-in-if/Widget.html b/test/runtime/samples/component-yield-multiple-in-if/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-yield-multiple-in-if/Widget.html
rename to test/runtime/samples/component-yield-multiple-in-if/Widget.svelte
diff --git a/test/runtime/samples/component-yield-multiple-in-if/main.html b/test/runtime/samples/component-yield-multiple-in-if/main.svelte
similarity index 75%
rename from test/runtime/samples/component-yield-multiple-in-if/main.html
rename to test/runtime/samples/component-yield-multiple-in-if/main.svelte
index 53eba749d6..db518183b5 100644
--- a/test/runtime/samples/component-yield-multiple-in-if/main.html
+++ b/test/runtime/samples/component-yield-multiple-in-if/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let arriving = true;
 </script>
diff --git a/test/runtime/samples/component-yield-nested-if/Inner.html b/test/runtime/samples/component-yield-nested-if/Inner.svelte
similarity index 100%
rename from test/runtime/samples/component-yield-nested-if/Inner.html
rename to test/runtime/samples/component-yield-nested-if/Inner.svelte
diff --git a/test/runtime/samples/component-yield-nested-if/Outer.html b/test/runtime/samples/component-yield-nested-if/Outer.svelte
similarity index 100%
rename from test/runtime/samples/component-yield-nested-if/Outer.html
rename to test/runtime/samples/component-yield-nested-if/Outer.svelte
diff --git a/test/runtime/samples/component-yield-nested-if/main.html b/test/runtime/samples/component-yield-nested-if/main.html
deleted file mode 100644
index 98c27812e6..0000000000
--- a/test/runtime/samples/component-yield-nested-if/main.html
+++ /dev/null
@@ -1,11 +0,0 @@
-<script>
-	import Outer from './Outer.html';
-	import Inner from './Inner.html';
-
-	export let foo = true;
-</script>
-
-<Outer {foo}>
-	One
-	<Inner/>
-</Outer>
\ No newline at end of file
diff --git a/test/runtime/samples/component-yield-nested-if/main.svelte b/test/runtime/samples/component-yield-nested-if/main.svelte
new file mode 100644
index 0000000000..2107a21ed4
--- /dev/null
+++ b/test/runtime/samples/component-yield-nested-if/main.svelte
@@ -0,0 +1,11 @@
+<script>
+	import Outer from './Outer.svelte';
+	import Inner from './Inner.svelte';
+
+	export let foo = true;
+</script>
+
+<Outer {foo}>
+	One
+	<Inner/>
+</Outer>
\ No newline at end of file
diff --git a/test/runtime/samples/component-yield-parent/Widget.html b/test/runtime/samples/component-yield-parent/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-yield-parent/Widget.html
rename to test/runtime/samples/component-yield-parent/Widget.svelte
diff --git a/test/runtime/samples/component-yield-parent/main.html b/test/runtime/samples/component-yield-parent/main.svelte
similarity index 64%
rename from test/runtime/samples/component-yield-parent/main.html
rename to test/runtime/samples/component-yield-parent/main.svelte
index b36dbc1b14..8de37236ae 100644
--- a/test/runtime/samples/component-yield-parent/main.html
+++ b/test/runtime/samples/component-yield-parent/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html'
+	import Widget from './Widget.svelte'
 	export let data = "Hello";
 </script>
 
diff --git a/test/runtime/samples/component-yield-placement/Modal.html b/test/runtime/samples/component-yield-placement/Modal.svelte
similarity index 100%
rename from test/runtime/samples/component-yield-placement/Modal.html
rename to test/runtime/samples/component-yield-placement/Modal.svelte
diff --git a/test/runtime/samples/component-yield-placement/main.html b/test/runtime/samples/component-yield-placement/main.svelte
similarity index 83%
rename from test/runtime/samples/component-yield-placement/main.html
rename to test/runtime/samples/component-yield-placement/main.svelte
index cc5bfd73ed..ee1a1221eb 100644
--- a/test/runtime/samples/component-yield-placement/main.html
+++ b/test/runtime/samples/component-yield-placement/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Modal from './Modal.html';
+	import Modal from './Modal.svelte';
 
 	export let showModal;
 </script>
diff --git a/test/runtime/samples/component-yield-static/Widget.html b/test/runtime/samples/component-yield-static/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component-yield-static/Widget.html
rename to test/runtime/samples/component-yield-static/Widget.svelte
diff --git a/test/runtime/samples/component-yield-static/main.html b/test/runtime/samples/component-yield-static/main.html
deleted file mode 100644
index 9d5807872d..0000000000
--- a/test/runtime/samples/component-yield-static/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-
-	export let name = '';
-</script>
-
-<Widget>Hello</Widget> {name}
\ No newline at end of file
diff --git a/test/runtime/samples/component-yield-static/main.svelte b/test/runtime/samples/component-yield-static/main.svelte
new file mode 100644
index 0000000000..3e99a8baa9
--- /dev/null
+++ b/test/runtime/samples/component-yield-static/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Widget from './Widget.svelte';
+
+	export let name = '';
+</script>
+
+<Widget>Hello</Widget> {name}
\ No newline at end of file
diff --git a/test/runtime/samples/component-yield/main.html b/test/runtime/samples/component-yield/main.svelte
similarity index 100%
rename from test/runtime/samples/component-yield/main.html
rename to test/runtime/samples/component-yield/main.svelte
diff --git a/test/runtime/samples/component/Widget.html b/test/runtime/samples/component/Widget.svelte
similarity index 100%
rename from test/runtime/samples/component/Widget.html
rename to test/runtime/samples/component/Widget.svelte
diff --git a/test/runtime/samples/component/main.html b/test/runtime/samples/component/main.html
deleted file mode 100644
index 1bd0073a0e..0000000000
--- a/test/runtime/samples/component/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-</script>
-
-<div>
-	<Widget/>
-</div>
\ No newline at end of file
diff --git a/test/runtime/samples/component/main.svelte b/test/runtime/samples/component/main.svelte
new file mode 100644
index 0000000000..fb2f332507
--- /dev/null
+++ b/test/runtime/samples/component/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Widget from './Widget.svelte';
+</script>
+
+<div>
+	<Widget/>
+</div>
\ No newline at end of file
diff --git a/test/runtime/samples/context-api/Tab.html b/test/runtime/samples/context-api/Tab.svelte
similarity index 87%
rename from test/runtime/samples/context-api/Tab.html
rename to test/runtime/samples/context-api/Tab.svelte
index 2f9793aed8..af3f002521 100644
--- a/test/runtime/samples/context-api/Tab.html
+++ b/test/runtime/samples/context-api/Tab.svelte
@@ -1,6 +1,6 @@
 <script>
 	import { getContext, onDestroy } from 'svelte';
-	import { TABS } from './Tabs.html';
+	import { TABS } from './Tabs.svelte';
 
 	const tab = {};
 	const { registerTab, unregisterTab, selectTab, selectedTab } = getContext(TABS);
diff --git a/test/runtime/samples/context-api/TabList.html b/test/runtime/samples/context-api/TabList.svelte
similarity index 100%
rename from test/runtime/samples/context-api/TabList.html
rename to test/runtime/samples/context-api/TabList.svelte
diff --git a/test/runtime/samples/context-api/TabPanel.html b/test/runtime/samples/context-api/TabPanel.svelte
similarity index 86%
rename from test/runtime/samples/context-api/TabPanel.html
rename to test/runtime/samples/context-api/TabPanel.svelte
index e15dfca021..a506ba9c07 100644
--- a/test/runtime/samples/context-api/TabPanel.html
+++ b/test/runtime/samples/context-api/TabPanel.svelte
@@ -1,6 +1,6 @@
 <script>
 	import { getContext, onDestroy } from 'svelte';
-	import { TABS } from './Tabs.html';
+	import { TABS } from './Tabs.svelte';
 
 	const panel = {};
 	const { registerPanel, unregisterPanel, selectedPanel } = getContext(TABS);
diff --git a/test/runtime/samples/context-api/Tabs.html b/test/runtime/samples/context-api/Tabs.svelte
similarity index 100%
rename from test/runtime/samples/context-api/Tabs.html
rename to test/runtime/samples/context-api/Tabs.svelte
diff --git a/test/runtime/samples/context-api/main.html b/test/runtime/samples/context-api/main.svelte
similarity index 68%
rename from test/runtime/samples/context-api/main.html
rename to test/runtime/samples/context-api/main.svelte
index ef3ee996d5..5d569a2125 100644
--- a/test/runtime/samples/context-api/main.html
+++ b/test/runtime/samples/context-api/main.svelte
@@ -1,8 +1,8 @@
 <script>
-	import Tabs from './Tabs.html';
-	import TabList from './TabList.html';
-	import Tab from './Tab.html';
-	import TabPanel from './TabPanel.html';
+	import Tabs from './Tabs.svelte';
+	import TabList from './TabList.svelte';
+	import Tab from './Tab.svelte';
+	import TabPanel from './TabPanel.svelte';
 
 	export let show_medium = false;
 </script>
diff --git a/test/runtime/samples/css-comments/main.html b/test/runtime/samples/css-comments/main.svelte
similarity index 100%
rename from test/runtime/samples/css-comments/main.html
rename to test/runtime/samples/css-comments/main.svelte
diff --git a/test/runtime/samples/css-false/Widget.html b/test/runtime/samples/css-false/Widget.svelte
similarity index 100%
rename from test/runtime/samples/css-false/Widget.html
rename to test/runtime/samples/css-false/Widget.svelte
diff --git a/test/runtime/samples/css-false/main.html b/test/runtime/samples/css-false/main.html
deleted file mode 100644
index dbbc5c325b..0000000000
--- a/test/runtime/samples/css-false/main.html
+++ /dev/null
@@ -1,6 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-</script>
-
-<p>control</p>
-<Widget/>
\ No newline at end of file
diff --git a/test/runtime/samples/css-false/main.svelte b/test/runtime/samples/css-false/main.svelte
new file mode 100644
index 0000000000..5129d127ba
--- /dev/null
+++ b/test/runtime/samples/css-false/main.svelte
@@ -0,0 +1,6 @@
+<script>
+	import Widget from './Widget.svelte';
+</script>
+
+<p>control</p>
+<Widget/>
\ No newline at end of file
diff --git a/test/runtime/samples/css-space-in-attribute/Widget.html b/test/runtime/samples/css-space-in-attribute/Widget.svelte
similarity index 100%
rename from test/runtime/samples/css-space-in-attribute/Widget.html
rename to test/runtime/samples/css-space-in-attribute/Widget.svelte
diff --git a/test/runtime/samples/css-space-in-attribute/main.html b/test/runtime/samples/css-space-in-attribute/main.svelte
similarity index 51%
rename from test/runtime/samples/css-space-in-attribute/main.html
rename to test/runtime/samples/css-space-in-attribute/main.svelte
index 93bec897f3..e23e6c4e40 100644
--- a/test/runtime/samples/css-space-in-attribute/main.html
+++ b/test/runtime/samples/css-space-in-attribute/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 <p class='foo bar'>control</p>
diff --git a/test/runtime/samples/css/Widget.html b/test/runtime/samples/css/Widget.svelte
similarity index 100%
rename from test/runtime/samples/css/Widget.html
rename to test/runtime/samples/css/Widget.svelte
diff --git a/test/runtime/samples/css/main.html b/test/runtime/samples/css/main.html
deleted file mode 100644
index dbbc5c325b..0000000000
--- a/test/runtime/samples/css/main.html
+++ /dev/null
@@ -1,6 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-</script>
-
-<p>control</p>
-<Widget/>
\ No newline at end of file
diff --git a/test/runtime/samples/css/main.svelte b/test/runtime/samples/css/main.svelte
new file mode 100644
index 0000000000..5129d127ba
--- /dev/null
+++ b/test/runtime/samples/css/main.svelte
@@ -0,0 +1,6 @@
+<script>
+	import Widget from './Widget.svelte';
+</script>
+
+<p>control</p>
+<Widget/>
\ No newline at end of file
diff --git a/test/runtime/samples/custom-method/main.html b/test/runtime/samples/custom-method/main.svelte
similarity index 100%
rename from test/runtime/samples/custom-method/main.html
rename to test/runtime/samples/custom-method/main.svelte
diff --git a/test/runtime/samples/deconflict-builtins/main.html b/test/runtime/samples/deconflict-builtins/main.svelte
similarity index 100%
rename from test/runtime/samples/deconflict-builtins/main.html
rename to test/runtime/samples/deconflict-builtins/main.svelte
diff --git a/test/runtime/samples/deconflict-component-name-with-global/main.html b/test/runtime/samples/deconflict-component-name-with-global/main.svelte
similarity index 100%
rename from test/runtime/samples/deconflict-component-name-with-global/main.html
rename to test/runtime/samples/deconflict-component-name-with-global/main.svelte
diff --git a/test/runtime/samples/deconflict-component-name-with-module-global/main.html b/test/runtime/samples/deconflict-component-name-with-module-global/main.svelte
similarity index 100%
rename from test/runtime/samples/deconflict-component-name-with-module-global/main.html
rename to test/runtime/samples/deconflict-component-name-with-module-global/main.svelte
diff --git a/test/runtime/samples/deconflict-component-refs/main.html b/test/runtime/samples/deconflict-component-refs/main.svelte
similarity index 100%
rename from test/runtime/samples/deconflict-component-refs/main.html
rename to test/runtime/samples/deconflict-component-refs/main.svelte
diff --git a/test/runtime/samples/deconflict-contexts/main.html b/test/runtime/samples/deconflict-contexts/main.svelte
similarity index 100%
rename from test/runtime/samples/deconflict-contexts/main.html
rename to test/runtime/samples/deconflict-contexts/main.svelte
diff --git a/test/runtime/samples/deconflict-elements-indexes/main.html b/test/runtime/samples/deconflict-elements-indexes/main.svelte
similarity index 100%
rename from test/runtime/samples/deconflict-elements-indexes/main.html
rename to test/runtime/samples/deconflict-elements-indexes/main.svelte
diff --git a/test/runtime/samples/deconflict-non-helpers/main.html b/test/runtime/samples/deconflict-non-helpers/main.svelte
similarity index 100%
rename from test/runtime/samples/deconflict-non-helpers/main.html
rename to test/runtime/samples/deconflict-non-helpers/main.svelte
diff --git a/test/runtime/samples/deconflict-self/main.html b/test/runtime/samples/deconflict-self/main.html
deleted file mode 100644
index 30f524eb69..0000000000
--- a/test/runtime/samples/deconflict-self/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Main from './nested/main.html';
-</script>
-
-<Main/>
\ No newline at end of file
diff --git a/test/runtime/samples/deconflict-self/main.svelte b/test/runtime/samples/deconflict-self/main.svelte
new file mode 100644
index 0000000000..7010a66c88
--- /dev/null
+++ b/test/runtime/samples/deconflict-self/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Main from './nested/main.svelte';
+</script>
+
+<Main/>
\ No newline at end of file
diff --git a/test/runtime/samples/deconflict-self/nested/main.html b/test/runtime/samples/deconflict-self/nested/main.svelte
similarity index 100%
rename from test/runtime/samples/deconflict-self/nested/main.html
rename to test/runtime/samples/deconflict-self/nested/main.svelte
diff --git a/test/runtime/samples/deconflict-template-1/main.html b/test/runtime/samples/deconflict-template-1/main.svelte
similarity index 100%
rename from test/runtime/samples/deconflict-template-1/main.html
rename to test/runtime/samples/deconflict-template-1/main.svelte
diff --git a/test/runtime/samples/deconflict-template-2/main.html b/test/runtime/samples/deconflict-template-2/main.svelte
similarity index 100%
rename from test/runtime/samples/deconflict-template-2/main.html
rename to test/runtime/samples/deconflict-template-2/main.svelte
diff --git a/test/runtime/samples/deconflict-vars/main.html b/test/runtime/samples/deconflict-vars/main.svelte
similarity index 100%
rename from test/runtime/samples/deconflict-vars/main.html
rename to test/runtime/samples/deconflict-vars/main.svelte
diff --git a/test/runtime/samples/default-data-function/main.html b/test/runtime/samples/default-data-function/main.svelte
similarity index 100%
rename from test/runtime/samples/default-data-function/main.html
rename to test/runtime/samples/default-data-function/main.svelte
diff --git a/test/runtime/samples/default-data-override/main.html b/test/runtime/samples/default-data-override/main.svelte
similarity index 100%
rename from test/runtime/samples/default-data-override/main.html
rename to test/runtime/samples/default-data-override/main.svelte
diff --git a/test/runtime/samples/default-data/main.html b/test/runtime/samples/default-data/main.svelte
similarity index 100%
rename from test/runtime/samples/default-data/main.html
rename to test/runtime/samples/default-data/main.svelte
diff --git a/test/runtime/samples/destroy-twice/main.html b/test/runtime/samples/destroy-twice/main.svelte
similarity index 100%
rename from test/runtime/samples/destroy-twice/main.html
rename to test/runtime/samples/destroy-twice/main.svelte
diff --git a/test/runtime/samples/destructuring/main.html b/test/runtime/samples/destructuring/main.svelte
similarity index 100%
rename from test/runtime/samples/destructuring/main.html
rename to test/runtime/samples/destructuring/main.svelte
diff --git a/test/runtime/samples/dev-warning-destroy-twice/main.html b/test/runtime/samples/dev-warning-destroy-twice/main.svelte
similarity index 100%
rename from test/runtime/samples/dev-warning-destroy-twice/main.html
rename to test/runtime/samples/dev-warning-destroy-twice/main.svelte
diff --git a/test/runtime/samples/dev-warning-helper/main.html b/test/runtime/samples/dev-warning-helper/main.svelte
similarity index 100%
rename from test/runtime/samples/dev-warning-helper/main.html
rename to test/runtime/samples/dev-warning-helper/main.svelte
diff --git a/test/runtime/samples/dev-warning-missing-data-binding/main.html b/test/runtime/samples/dev-warning-missing-data-binding/main.svelte
similarity index 100%
rename from test/runtime/samples/dev-warning-missing-data-binding/main.html
rename to test/runtime/samples/dev-warning-missing-data-binding/main.svelte
diff --git a/test/runtime/samples/dev-warning-missing-data-component/Foo.html b/test/runtime/samples/dev-warning-missing-data-component/Foo.svelte
similarity index 100%
rename from test/runtime/samples/dev-warning-missing-data-component/Foo.html
rename to test/runtime/samples/dev-warning-missing-data-component/Foo.svelte
diff --git a/test/runtime/samples/dev-warning-missing-data-component/main.html b/test/runtime/samples/dev-warning-missing-data-component/main.html
deleted file mode 100644
index 2bda6e2937..0000000000
--- a/test/runtime/samples/dev-warning-missing-data-component/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Foo from './Foo.html';
-</script>
-
-<Foo x={undefined}/>
\ No newline at end of file
diff --git a/test/runtime/samples/dev-warning-missing-data-component/main.svelte b/test/runtime/samples/dev-warning-missing-data-component/main.svelte
new file mode 100644
index 0000000000..15a5895b3d
--- /dev/null
+++ b/test/runtime/samples/dev-warning-missing-data-component/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Foo from './Foo.svelte';
+</script>
+
+<Foo x={undefined}/>
\ No newline at end of file
diff --git a/test/runtime/samples/dev-warning-missing-data-each/main.html b/test/runtime/samples/dev-warning-missing-data-each/main.svelte
similarity index 100%
rename from test/runtime/samples/dev-warning-missing-data-each/main.html
rename to test/runtime/samples/dev-warning-missing-data-each/main.svelte
diff --git a/test/runtime/samples/dev-warning-missing-data-excludes-event/main.html b/test/runtime/samples/dev-warning-missing-data-excludes-event/main.svelte
similarity index 100%
rename from test/runtime/samples/dev-warning-missing-data-excludes-event/main.html
rename to test/runtime/samples/dev-warning-missing-data-excludes-event/main.svelte
diff --git a/test/runtime/samples/dev-warning-missing-data/main.html b/test/runtime/samples/dev-warning-missing-data/main.svelte
similarity index 100%
rename from test/runtime/samples/dev-warning-missing-data/main.html
rename to test/runtime/samples/dev-warning-missing-data/main.svelte
diff --git a/test/runtime/samples/dev-warning-readonly-computed/main.html b/test/runtime/samples/dev-warning-readonly-computed/main.svelte
similarity index 100%
rename from test/runtime/samples/dev-warning-readonly-computed/main.html
rename to test/runtime/samples/dev-warning-readonly-computed/main.svelte
diff --git a/test/runtime/samples/dev-warning-readonly-window-binding/main.html b/test/runtime/samples/dev-warning-readonly-window-binding/main.svelte
similarity index 100%
rename from test/runtime/samples/dev-warning-readonly-window-binding/main.html
rename to test/runtime/samples/dev-warning-readonly-window-binding/main.svelte
diff --git a/test/runtime/samples/document-event/main.html b/test/runtime/samples/document-event/main.svelte
similarity index 100%
rename from test/runtime/samples/document-event/main.html
rename to test/runtime/samples/document-event/main.svelte
diff --git a/test/runtime/samples/dynamic-component-bindings-recreated-b/Green.html b/test/runtime/samples/dynamic-component-bindings-recreated-b/Green.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-bindings-recreated-b/Green.html
rename to test/runtime/samples/dynamic-component-bindings-recreated-b/Green.svelte
diff --git a/test/runtime/samples/dynamic-component-bindings-recreated-b/Red.html b/test/runtime/samples/dynamic-component-bindings-recreated-b/Red.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-bindings-recreated-b/Red.html
rename to test/runtime/samples/dynamic-component-bindings-recreated-b/Red.svelte
diff --git a/test/runtime/samples/dynamic-component-bindings-recreated-b/main.html b/test/runtime/samples/dynamic-component-bindings-recreated-b/main.html
deleted file mode 100644
index cdae60e835..0000000000
--- a/test/runtime/samples/dynamic-component-bindings-recreated-b/main.html
+++ /dev/null
@@ -1,10 +0,0 @@
-<script>
-	import Green from './Green.html';
-	import Red from './Red.html';
-
-	export let foo;
-	export let x;
-</script>
-
-<p>parent {foo}</p>
-<svelte:component this="{x ? Green : Red}" bind:foo />
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-bindings-recreated-b/main.svelte b/test/runtime/samples/dynamic-component-bindings-recreated-b/main.svelte
new file mode 100644
index 0000000000..019718e5cb
--- /dev/null
+++ b/test/runtime/samples/dynamic-component-bindings-recreated-b/main.svelte
@@ -0,0 +1,10 @@
+<script>
+	import Green from './Green.svelte';
+	import Red from './Red.svelte';
+
+	export let foo;
+	export let x;
+</script>
+
+<p>parent {foo}</p>
+<svelte:component this="{x ? Green : Red}" bind:foo />
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-bindings-recreated/Green.html b/test/runtime/samples/dynamic-component-bindings-recreated/Green.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-bindings-recreated/Green.html
rename to test/runtime/samples/dynamic-component-bindings-recreated/Green.svelte
diff --git a/test/runtime/samples/dynamic-component-bindings-recreated/Red.html b/test/runtime/samples/dynamic-component-bindings-recreated/Red.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-bindings-recreated/Red.html
rename to test/runtime/samples/dynamic-component-bindings-recreated/Red.svelte
diff --git a/test/runtime/samples/dynamic-component-bindings-recreated/main.html b/test/runtime/samples/dynamic-component-bindings-recreated/main.html
deleted file mode 100644
index c91906e5df..0000000000
--- a/test/runtime/samples/dynamic-component-bindings-recreated/main.html
+++ /dev/null
@@ -1,9 +0,0 @@
-<script>
-	import Green from './Green.html';
-	import Red from './Red.html';
-
-	export let x;
-	export let foo;
-</script>
-
-<svelte:component this="{x ? Green : Red}" bind:foo />
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-bindings-recreated/main.svelte b/test/runtime/samples/dynamic-component-bindings-recreated/main.svelte
new file mode 100644
index 0000000000..011ac923b2
--- /dev/null
+++ b/test/runtime/samples/dynamic-component-bindings-recreated/main.svelte
@@ -0,0 +1,9 @@
+<script>
+	import Green from './Green.svelte';
+	import Red from './Red.svelte';
+
+	export let x;
+	export let foo;
+</script>
+
+<svelte:component this="{x ? Green : Red}" bind:foo />
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-bindings/Bar.html b/test/runtime/samples/dynamic-component-bindings/Bar.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-bindings/Bar.html
rename to test/runtime/samples/dynamic-component-bindings/Bar.svelte
diff --git a/test/runtime/samples/dynamic-component-bindings/Foo.html b/test/runtime/samples/dynamic-component-bindings/Foo.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-bindings/Foo.html
rename to test/runtime/samples/dynamic-component-bindings/Foo.svelte
diff --git a/test/runtime/samples/dynamic-component-bindings/main.html b/test/runtime/samples/dynamic-component-bindings/main.html
deleted file mode 100644
index 0df350a9f2..0000000000
--- a/test/runtime/samples/dynamic-component-bindings/main.html
+++ /dev/null
@@ -1,10 +0,0 @@
-<script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
-
-	export let x;
-	export let y;
-	export let z;
-</script>
-
-<svelte:component this="{ x ? Foo : Bar }" bind:y bind:z/>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-bindings/main.svelte b/test/runtime/samples/dynamic-component-bindings/main.svelte
new file mode 100644
index 0000000000..31d0f86e5e
--- /dev/null
+++ b/test/runtime/samples/dynamic-component-bindings/main.svelte
@@ -0,0 +1,10 @@
+<script>
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
+
+	export let x;
+	export let y;
+	export let z;
+</script>
+
+<svelte:component this="{ x ? Foo : Bar }" bind:y bind:z/>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-destroy-null/main.html b/test/runtime/samples/dynamic-component-destroy-null/main.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-destroy-null/main.html
rename to test/runtime/samples/dynamic-component-destroy-null/main.svelte
diff --git a/test/runtime/samples/dynamic-component-events/Bar.html b/test/runtime/samples/dynamic-component-events/Bar.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-events/Bar.html
rename to test/runtime/samples/dynamic-component-events/Bar.svelte
diff --git a/test/runtime/samples/dynamic-component-events/Foo.html b/test/runtime/samples/dynamic-component-events/Foo.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-events/Foo.html
rename to test/runtime/samples/dynamic-component-events/Foo.svelte
diff --git a/test/runtime/samples/dynamic-component-events/main.html b/test/runtime/samples/dynamic-component-events/main.svelte
similarity index 58%
rename from test/runtime/samples/dynamic-component-events/main.html
rename to test/runtime/samples/dynamic-component-events/main.svelte
index 77856e8e63..f60e578289 100644
--- a/test/runtime/samples/dynamic-component-events/main.html
+++ b/test/runtime/samples/dynamic-component-events/main.svelte
@@ -1,6 +1,6 @@
 <script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
 
 	export let x;
 	export let selected;
diff --git a/test/runtime/samples/dynamic-component-in-if/Bar.html b/test/runtime/samples/dynamic-component-in-if/Bar.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-in-if/Bar.html
rename to test/runtime/samples/dynamic-component-in-if/Bar.svelte
diff --git a/test/runtime/samples/dynamic-component-in-if/Foo.html b/test/runtime/samples/dynamic-component-in-if/Foo.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-in-if/Foo.html
rename to test/runtime/samples/dynamic-component-in-if/Foo.svelte
diff --git a/test/runtime/samples/dynamic-component-in-if/main.html b/test/runtime/samples/dynamic-component-in-if/main.svelte
similarity index 57%
rename from test/runtime/samples/dynamic-component-in-if/main.html
rename to test/runtime/samples/dynamic-component-in-if/main.svelte
index dfd6f6a085..821dadf106 100644
--- a/test/runtime/samples/dynamic-component-in-if/main.html
+++ b/test/runtime/samples/dynamic-component-in-if/main.svelte
@@ -1,6 +1,6 @@
 <script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
 
 	export { Bar };
 	export let x = Foo;
diff --git a/test/runtime/samples/dynamic-component-inside-element/Bar.html b/test/runtime/samples/dynamic-component-inside-element/Bar.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-inside-element/Bar.html
rename to test/runtime/samples/dynamic-component-inside-element/Bar.svelte
diff --git a/test/runtime/samples/dynamic-component-inside-element/Foo.html b/test/runtime/samples/dynamic-component-inside-element/Foo.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-inside-element/Foo.html
rename to test/runtime/samples/dynamic-component-inside-element/Foo.svelte
diff --git a/test/runtime/samples/dynamic-component-inside-element/main.html b/test/runtime/samples/dynamic-component-inside-element/main.svelte
similarity index 57%
rename from test/runtime/samples/dynamic-component-inside-element/main.html
rename to test/runtime/samples/dynamic-component-inside-element/main.svelte
index 2a882c945f..e6efa606a4 100644
--- a/test/runtime/samples/dynamic-component-inside-element/main.html
+++ b/test/runtime/samples/dynamic-component-inside-element/main.svelte
@@ -1,6 +1,6 @@
 <script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
 
 	export let x;
 </script>
diff --git a/test/runtime/samples/dynamic-component-nulled-out/Foo.html b/test/runtime/samples/dynamic-component-nulled-out/Foo.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-nulled-out/Foo.html
rename to test/runtime/samples/dynamic-component-nulled-out/Foo.svelte
diff --git a/test/runtime/samples/dynamic-component-nulled-out/main.html b/test/runtime/samples/dynamic-component-nulled-out/main.html
deleted file mode 100644
index b98ecb8f7e..0000000000
--- a/test/runtime/samples/dynamic-component-nulled-out/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Foo from './Foo.html';
-
-	export let Bar = Foo;
-</script>
-
-<svelte:component this={Bar}/>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-nulled-out/main.svelte b/test/runtime/samples/dynamic-component-nulled-out/main.svelte
new file mode 100644
index 0000000000..2df6837267
--- /dev/null
+++ b/test/runtime/samples/dynamic-component-nulled-out/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Foo from './Foo.svelte';
+
+	export let Bar = Foo;
+</script>
+
+<svelte:component this={Bar}/>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-ref/Foo.html b/test/runtime/samples/dynamic-component-ref/Foo.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-ref/Foo.html
rename to test/runtime/samples/dynamic-component-ref/Foo.svelte
diff --git a/test/runtime/samples/dynamic-component-ref/main.html b/test/runtime/samples/dynamic-component-ref/main.svelte
similarity index 72%
rename from test/runtime/samples/dynamic-component-ref/main.html
rename to test/runtime/samples/dynamic-component-ref/main.svelte
index fe9c52cab6..984f34fc7b 100644
--- a/test/runtime/samples/dynamic-component-ref/main.html
+++ b/test/runtime/samples/dynamic-component-ref/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 
 	export let test;
 </script>
diff --git a/test/runtime/samples/dynamic-component-slot/Bar.html b/test/runtime/samples/dynamic-component-slot/Bar.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-slot/Bar.html
rename to test/runtime/samples/dynamic-component-slot/Bar.svelte
diff --git a/test/runtime/samples/dynamic-component-slot/Baz.html b/test/runtime/samples/dynamic-component-slot/Baz.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-slot/Baz.html
rename to test/runtime/samples/dynamic-component-slot/Baz.svelte
diff --git a/test/runtime/samples/dynamic-component-slot/Foo.html b/test/runtime/samples/dynamic-component-slot/Foo.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-slot/Foo.html
rename to test/runtime/samples/dynamic-component-slot/Foo.svelte
diff --git a/test/runtime/samples/dynamic-component-slot/main.html b/test/runtime/samples/dynamic-component-slot/main.svelte
similarity index 78%
rename from test/runtime/samples/dynamic-component-slot/main.html
rename to test/runtime/samples/dynamic-component-slot/main.svelte
index 32f1ecce19..99bcf9e64f 100644
--- a/test/runtime/samples/dynamic-component-slot/main.html
+++ b/test/runtime/samples/dynamic-component-slot/main.svelte
@@ -1,7 +1,7 @@
 <script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
-	import Baz from './Baz.html';
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
+	import Baz from './Baz.svelte';
 
 	export let x;
 	export let tag = 'you\'re it';
diff --git a/test/runtime/samples/dynamic-component-update-existing-instance/Bar.html b/test/runtime/samples/dynamic-component-update-existing-instance/Bar.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-update-existing-instance/Bar.html
rename to test/runtime/samples/dynamic-component-update-existing-instance/Bar.svelte
diff --git a/test/runtime/samples/dynamic-component-update-existing-instance/Foo.html b/test/runtime/samples/dynamic-component-update-existing-instance/Foo.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component-update-existing-instance/Foo.html
rename to test/runtime/samples/dynamic-component-update-existing-instance/Foo.svelte
diff --git a/test/runtime/samples/dynamic-component-update-existing-instance/main.html b/test/runtime/samples/dynamic-component-update-existing-instance/main.html
deleted file mode 100644
index efa9394d30..0000000000
--- a/test/runtime/samples/dynamic-component-update-existing-instance/main.html
+++ /dev/null
@@ -1,8 +0,0 @@
-<script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
-
-	export let x;
-</script>
-
-<svelte:component this="{ x ? Foo : Bar }" x='{x}'/>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-update-existing-instance/main.svelte b/test/runtime/samples/dynamic-component-update-existing-instance/main.svelte
new file mode 100644
index 0000000000..6e2a8cde5e
--- /dev/null
+++ b/test/runtime/samples/dynamic-component-update-existing-instance/main.svelte
@@ -0,0 +1,8 @@
+<script>
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
+
+	export let x;
+</script>
+
+<svelte:component this="{ x ? Foo : Bar }" x='{x}'/>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component/Bar.html b/test/runtime/samples/dynamic-component/Bar.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component/Bar.html
rename to test/runtime/samples/dynamic-component/Bar.svelte
diff --git a/test/runtime/samples/dynamic-component/Foo.html b/test/runtime/samples/dynamic-component/Foo.svelte
similarity index 100%
rename from test/runtime/samples/dynamic-component/Foo.html
rename to test/runtime/samples/dynamic-component/Foo.svelte
diff --git a/test/runtime/samples/dynamic-component/main.html b/test/runtime/samples/dynamic-component/main.html
deleted file mode 100644
index efa9394d30..0000000000
--- a/test/runtime/samples/dynamic-component/main.html
+++ /dev/null
@@ -1,8 +0,0 @@
-<script>
-	import Foo from './Foo.html';
-	import Bar from './Bar.html';
-
-	export let x;
-</script>
-
-<svelte:component this="{ x ? Foo : Bar }" x='{x}'/>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component/main.svelte b/test/runtime/samples/dynamic-component/main.svelte
new file mode 100644
index 0000000000..6e2a8cde5e
--- /dev/null
+++ b/test/runtime/samples/dynamic-component/main.svelte
@@ -0,0 +1,8 @@
+<script>
+	import Foo from './Foo.svelte';
+	import Bar from './Bar.svelte';
+
+	export let x;
+</script>
+
+<svelte:component this="{ x ? Foo : Bar }" x='{x}'/>
\ No newline at end of file
diff --git a/test/runtime/samples/each-block-array-literal/main.html b/test/runtime/samples/each-block-array-literal/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-array-literal/main.html
rename to test/runtime/samples/each-block-array-literal/main.svelte
diff --git a/test/runtime/samples/each-block-containing-component-in-if/Nested.html b/test/runtime/samples/each-block-containing-component-in-if/Nested.svelte
similarity index 100%
rename from test/runtime/samples/each-block-containing-component-in-if/Nested.html
rename to test/runtime/samples/each-block-containing-component-in-if/Nested.svelte
diff --git a/test/runtime/samples/each-block-containing-component-in-if/main.html b/test/runtime/samples/each-block-containing-component-in-if/main.svelte
similarity index 67%
rename from test/runtime/samples/each-block-containing-component-in-if/main.html
rename to test/runtime/samples/each-block-containing-component-in-if/main.svelte
index 16f042a277..049948fa56 100644
--- a/test/runtime/samples/each-block-containing-component-in-if/main.html
+++ b/test/runtime/samples/each-block-containing-component-in-if/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let show;
 	export let fields;
diff --git a/test/runtime/samples/each-block-containing-if/main.html b/test/runtime/samples/each-block-containing-if/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-containing-if/main.html
rename to test/runtime/samples/each-block-containing-if/main.svelte
diff --git a/test/runtime/samples/each-block-deconflict-name-context/main.html b/test/runtime/samples/each-block-deconflict-name-context/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-deconflict-name-context/main.html
rename to test/runtime/samples/each-block-deconflict-name-context/main.svelte
diff --git a/test/runtime/samples/each-block-destructured-array-sparse/main.html b/test/runtime/samples/each-block-destructured-array-sparse/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-destructured-array-sparse/main.html
rename to test/runtime/samples/each-block-destructured-array-sparse/main.svelte
diff --git a/test/runtime/samples/each-block-destructured-array/main.html b/test/runtime/samples/each-block-destructured-array/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-destructured-array/main.html
rename to test/runtime/samples/each-block-destructured-array/main.svelte
diff --git a/test/runtime/samples/each-block-destructured-object-binding/main.html b/test/runtime/samples/each-block-destructured-object-binding/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-destructured-object-binding/main.html
rename to test/runtime/samples/each-block-destructured-object-binding/main.svelte
diff --git a/test/runtime/samples/each-block-destructured-object/main.html b/test/runtime/samples/each-block-destructured-object/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-destructured-object/main.html
rename to test/runtime/samples/each-block-destructured-object/main.svelte
diff --git a/test/runtime/samples/each-block-dynamic-else-static/main.html b/test/runtime/samples/each-block-dynamic-else-static/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-dynamic-else-static/main.html
rename to test/runtime/samples/each-block-dynamic-else-static/main.svelte
diff --git a/test/runtime/samples/each-block-else-mount-or-intro/Widget.html b/test/runtime/samples/each-block-else-mount-or-intro/Widget.svelte
similarity index 100%
rename from test/runtime/samples/each-block-else-mount-or-intro/Widget.html
rename to test/runtime/samples/each-block-else-mount-or-intro/Widget.svelte
diff --git a/test/runtime/samples/each-block-else-mount-or-intro/main.html b/test/runtime/samples/each-block-else-mount-or-intro/main.svelte
similarity index 73%
rename from test/runtime/samples/each-block-else-mount-or-intro/main.html
rename to test/runtime/samples/each-block-else-mount-or-intro/main.svelte
index 949eb9b096..5b4d2e37a6 100644
--- a/test/runtime/samples/each-block-else-mount-or-intro/main.html
+++ b/test/runtime/samples/each-block-else-mount-or-intro/main.svelte
@@ -1,7 +1,7 @@
 <script>
 	export let items;
 
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 {#each items as item}
diff --git a/test/runtime/samples/each-block-else-starts-empty/main.html b/test/runtime/samples/each-block-else-starts-empty/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-else-starts-empty/main.html
rename to test/runtime/samples/each-block-else-starts-empty/main.svelte
diff --git a/test/runtime/samples/each-block-else/main.html b/test/runtime/samples/each-block-else/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-else/main.html
rename to test/runtime/samples/each-block-else/main.svelte
diff --git a/test/runtime/samples/each-block-empty-outro/Thing.html b/test/runtime/samples/each-block-empty-outro/Thing.svelte
similarity index 100%
rename from test/runtime/samples/each-block-empty-outro/Thing.html
rename to test/runtime/samples/each-block-empty-outro/Thing.svelte
diff --git a/test/runtime/samples/each-block-empty-outro/main.html b/test/runtime/samples/each-block-empty-outro/main.svelte
similarity index 79%
rename from test/runtime/samples/each-block-empty-outro/main.html
rename to test/runtime/samples/each-block-empty-outro/main.svelte
index 325cbbcf45..338f471d31 100644
--- a/test/runtime/samples/each-block-empty-outro/main.html
+++ b/test/runtime/samples/each-block-empty-outro/main.svelte
@@ -2,7 +2,7 @@
 	export let visible;
 	export let empty;
 
-	import Thing from './Thing.html';
+	import Thing from './Thing.svelte';
 </script>
 
 {#if visible}
diff --git a/test/runtime/samples/each-block-function/main.html b/test/runtime/samples/each-block-function/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-function/main.html
rename to test/runtime/samples/each-block-function/main.svelte
diff --git a/test/runtime/samples/each-block-in-if-block/main.html b/test/runtime/samples/each-block-in-if-block/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-in-if-block/main.html
rename to test/runtime/samples/each-block-in-if-block/main.svelte
diff --git a/test/runtime/samples/each-block-index-only/main.html b/test/runtime/samples/each-block-index-only/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-index-only/main.html
rename to test/runtime/samples/each-block-index-only/main.svelte
diff --git a/test/runtime/samples/each-block-indexed/main.html b/test/runtime/samples/each-block-indexed/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-indexed/main.html
rename to test/runtime/samples/each-block-indexed/main.svelte
diff --git a/test/runtime/samples/each-block-keyed-dynamic/main.html b/test/runtime/samples/each-block-keyed-dynamic/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-keyed-dynamic/main.html
rename to test/runtime/samples/each-block-keyed-dynamic/main.svelte
diff --git a/test/runtime/samples/each-block-keyed-empty/main.html b/test/runtime/samples/each-block-keyed-empty/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-keyed-empty/main.html
rename to test/runtime/samples/each-block-keyed-empty/main.svelte
diff --git a/test/runtime/samples/each-block-keyed-non-prop/main.html b/test/runtime/samples/each-block-keyed-non-prop/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-keyed-non-prop/main.html
rename to test/runtime/samples/each-block-keyed-non-prop/main.svelte
diff --git a/test/runtime/samples/each-block-keyed-random-permute/main.html b/test/runtime/samples/each-block-keyed-random-permute/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-keyed-random-permute/main.html
rename to test/runtime/samples/each-block-keyed-random-permute/main.svelte
diff --git a/test/runtime/samples/each-block-keyed-siblings/main.html b/test/runtime/samples/each-block-keyed-siblings/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-keyed-siblings/main.html
rename to test/runtime/samples/each-block-keyed-siblings/main.svelte
diff --git a/test/runtime/samples/each-block-keyed-static/main.html b/test/runtime/samples/each-block-keyed-static/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-keyed-static/main.html
rename to test/runtime/samples/each-block-keyed-static/main.svelte
diff --git a/test/runtime/samples/each-block-keyed-unshift/Nested.html b/test/runtime/samples/each-block-keyed-unshift/Nested.svelte
similarity index 100%
rename from test/runtime/samples/each-block-keyed-unshift/Nested.html
rename to test/runtime/samples/each-block-keyed-unshift/Nested.svelte
diff --git a/test/runtime/samples/each-block-keyed-unshift/main.html b/test/runtime/samples/each-block-keyed-unshift/main.svelte
similarity index 70%
rename from test/runtime/samples/each-block-keyed-unshift/main.html
rename to test/runtime/samples/each-block-keyed-unshift/main.svelte
index 5af62d4e08..b8954e17fd 100644
--- a/test/runtime/samples/each-block-keyed-unshift/main.html
+++ b/test/runtime/samples/each-block-keyed-unshift/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let titles;
 </script>
diff --git a/test/runtime/samples/each-block-keyed/main.html b/test/runtime/samples/each-block-keyed/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-keyed/main.html
rename to test/runtime/samples/each-block-keyed/main.svelte
diff --git a/test/runtime/samples/each-block-random-permute/main.html b/test/runtime/samples/each-block-random-permute/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-random-permute/main.html
rename to test/runtime/samples/each-block-random-permute/main.svelte
diff --git a/test/runtime/samples/each-block-scope-shadow/main.html b/test/runtime/samples/each-block-scope-shadow/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-scope-shadow/main.html
rename to test/runtime/samples/each-block-scope-shadow/main.svelte
diff --git a/test/runtime/samples/each-block-static/main.html b/test/runtime/samples/each-block-static/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-static/main.html
rename to test/runtime/samples/each-block-static/main.svelte
diff --git a/test/runtime/samples/each-block-text-node/main.html b/test/runtime/samples/each-block-text-node/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block-text-node/main.html
rename to test/runtime/samples/each-block-text-node/main.svelte
diff --git a/test/runtime/samples/each-block/main.html b/test/runtime/samples/each-block/main.svelte
similarity index 100%
rename from test/runtime/samples/each-block/main.html
rename to test/runtime/samples/each-block/main.svelte
diff --git a/test/runtime/samples/each-blocks-expression/main.html b/test/runtime/samples/each-blocks-expression/main.svelte
similarity index 100%
rename from test/runtime/samples/each-blocks-expression/main.html
rename to test/runtime/samples/each-blocks-expression/main.svelte
diff --git a/test/runtime/samples/each-blocks-nested-b/main.html b/test/runtime/samples/each-blocks-nested-b/main.svelte
similarity index 100%
rename from test/runtime/samples/each-blocks-nested-b/main.html
rename to test/runtime/samples/each-blocks-nested-b/main.svelte
diff --git a/test/runtime/samples/each-blocks-nested/main.html b/test/runtime/samples/each-blocks-nested/main.svelte
similarity index 100%
rename from test/runtime/samples/each-blocks-nested/main.html
rename to test/runtime/samples/each-blocks-nested/main.svelte
diff --git a/test/runtime/samples/element-invalid-name/main.html b/test/runtime/samples/element-invalid-name/main.svelte
similarity index 100%
rename from test/runtime/samples/element-invalid-name/main.html
rename to test/runtime/samples/element-invalid-name/main.svelte
diff --git a/test/runtime/samples/element-source-location/Foo.html b/test/runtime/samples/element-source-location/Foo.svelte
similarity index 100%
rename from test/runtime/samples/element-source-location/Foo.html
rename to test/runtime/samples/element-source-location/Foo.svelte
diff --git a/test/runtime/samples/element-source-location/main.html b/test/runtime/samples/element-source-location/main.svelte
similarity index 54%
rename from test/runtime/samples/element-source-location/main.html
rename to test/runtime/samples/element-source-location/main.svelte
index ca70895728..38855ef3ac 100644
--- a/test/runtime/samples/element-source-location/main.html
+++ b/test/runtime/samples/element-source-location/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 </script>
 
 <h1>this is a header</h1>
diff --git a/test/runtime/samples/empty-style-block/main.html b/test/runtime/samples/empty-style-block/main.svelte
similarity index 100%
rename from test/runtime/samples/empty-style-block/main.html
rename to test/runtime/samples/empty-style-block/main.svelte
diff --git a/test/runtime/samples/escape-template-literals/Widget.html b/test/runtime/samples/escape-template-literals/Widget.svelte
similarity index 100%
rename from test/runtime/samples/escape-template-literals/Widget.html
rename to test/runtime/samples/escape-template-literals/Widget.svelte
diff --git a/test/runtime/samples/escape-template-literals/main.html b/test/runtime/samples/escape-template-literals/main.svelte
similarity index 75%
rename from test/runtime/samples/escape-template-literals/main.html
rename to test/runtime/samples/escape-template-literals/main.svelte
index bfd016de6b..d26aa6ea63 100644
--- a/test/runtime/samples/escape-template-literals/main.html
+++ b/test/runtime/samples/escape-template-literals/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 <code>`$&#123;foo}\n`</code>
diff --git a/test/runtime/samples/escaped-text/main.html b/test/runtime/samples/escaped-text/main.svelte
similarity index 100%
rename from test/runtime/samples/escaped-text/main.html
rename to test/runtime/samples/escaped-text/main.svelte
diff --git a/test/runtime/samples/event-handler-console-log/main.html b/test/runtime/samples/event-handler-console-log/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-console-log/main.html
rename to test/runtime/samples/event-handler-console-log/main.svelte
diff --git a/test/runtime/samples/event-handler-deconflicted/main.html b/test/runtime/samples/event-handler-deconflicted/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-deconflicted/main.html
rename to test/runtime/samples/event-handler-deconflicted/main.svelte
diff --git a/test/runtime/samples/event-handler-each-context/main.html b/test/runtime/samples/event-handler-each-context/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-each-context/main.html
rename to test/runtime/samples/event-handler-each-context/main.svelte
diff --git a/test/runtime/samples/event-handler-each-deconflicted/main.html b/test/runtime/samples/event-handler-each-deconflicted/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-each-deconflicted/main.html
rename to test/runtime/samples/event-handler-each-deconflicted/main.svelte
diff --git a/test/runtime/samples/event-handler-each-this/main.html b/test/runtime/samples/event-handler-each-this/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-each-this/main.html
rename to test/runtime/samples/event-handler-each-this/main.svelte
diff --git a/test/runtime/samples/event-handler-each/main.html b/test/runtime/samples/event-handler-each/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-each/main.html
rename to test/runtime/samples/event-handler-each/main.svelte
diff --git a/test/runtime/samples/event-handler-event-methods/main.html b/test/runtime/samples/event-handler-event-methods/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-event-methods/main.html
rename to test/runtime/samples/event-handler-event-methods/main.svelte
diff --git a/test/runtime/samples/event-handler-hoisted/main.html b/test/runtime/samples/event-handler-hoisted/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-hoisted/main.html
rename to test/runtime/samples/event-handler-hoisted/main.svelte
diff --git a/test/runtime/samples/event-handler-modifier-once/main.html b/test/runtime/samples/event-handler-modifier-once/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-modifier-once/main.html
rename to test/runtime/samples/event-handler-modifier-once/main.svelte
diff --git a/test/runtime/samples/event-handler-modifier-prevent-default/main.html b/test/runtime/samples/event-handler-modifier-prevent-default/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-modifier-prevent-default/main.html
rename to test/runtime/samples/event-handler-modifier-prevent-default/main.svelte
diff --git a/test/runtime/samples/event-handler-modifier-stop-propagation/main.html b/test/runtime/samples/event-handler-modifier-stop-propagation/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-modifier-stop-propagation/main.html
rename to test/runtime/samples/event-handler-modifier-stop-propagation/main.svelte
diff --git a/test/runtime/samples/event-handler-removal/main.html b/test/runtime/samples/event-handler-removal/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-removal/main.html
rename to test/runtime/samples/event-handler-removal/main.svelte
diff --git a/test/runtime/samples/event-handler-sanitize/main.html b/test/runtime/samples/event-handler-sanitize/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-sanitize/main.html
rename to test/runtime/samples/event-handler-sanitize/main.svelte
diff --git a/test/runtime/samples/event-handler-shorthand-component/Widget.html b/test/runtime/samples/event-handler-shorthand-component/Widget.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-shorthand-component/Widget.html
rename to test/runtime/samples/event-handler-shorthand-component/Widget.svelte
diff --git a/test/runtime/samples/event-handler-shorthand-component/main.html b/test/runtime/samples/event-handler-shorthand-component/main.html
deleted file mode 100644
index 26586d3fd3..0000000000
--- a/test/runtime/samples/event-handler-shorthand-component/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-</script>
-
-<Widget on:foo/>
\ No newline at end of file
diff --git a/test/runtime/samples/event-handler-shorthand-component/main.svelte b/test/runtime/samples/event-handler-shorthand-component/main.svelte
new file mode 100644
index 0000000000..df21f9e8b8
--- /dev/null
+++ b/test/runtime/samples/event-handler-shorthand-component/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Widget from './Widget.svelte';
+</script>
+
+<Widget on:foo/>
\ No newline at end of file
diff --git a/test/runtime/samples/event-handler-shorthand-dynamic-component/Widget.html b/test/runtime/samples/event-handler-shorthand-dynamic-component/Widget.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-shorthand-dynamic-component/Widget.html
rename to test/runtime/samples/event-handler-shorthand-dynamic-component/Widget.svelte
diff --git a/test/runtime/samples/event-handler-shorthand-dynamic-component/main.html b/test/runtime/samples/event-handler-shorthand-dynamic-component/main.svelte
similarity index 61%
rename from test/runtime/samples/event-handler-shorthand-dynamic-component/main.html
rename to test/runtime/samples/event-handler-shorthand-dynamic-component/main.svelte
index f38a4d30bb..f6c5494ce4 100644
--- a/test/runtime/samples/event-handler-shorthand-dynamic-component/main.html
+++ b/test/runtime/samples/event-handler-shorthand-dynamic-component/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 <svelte:component this={Widget} on:foo/>
diff --git a/test/runtime/samples/event-handler-this-methods/main.html b/test/runtime/samples/event-handler-this-methods/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler-this-methods/main.html
rename to test/runtime/samples/event-handler-this-methods/main.svelte
diff --git a/test/runtime/samples/event-handler/main.html b/test/runtime/samples/event-handler/main.svelte
similarity index 100%
rename from test/runtime/samples/event-handler/main.html
rename to test/runtime/samples/event-handler/main.svelte
diff --git a/test/runtime/samples/flush-before-bindings/Nested.html b/test/runtime/samples/flush-before-bindings/Nested.svelte
similarity index 87%
rename from test/runtime/samples/flush-before-bindings/Nested.html
rename to test/runtime/samples/flush-before-bindings/Nested.svelte
index a632b585a8..0a1721d308 100644
--- a/test/runtime/samples/flush-before-bindings/Nested.html
+++ b/test/runtime/samples/flush-before-bindings/Nested.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Visibility from './Visibility.html';
+	import Visibility from './Visibility.svelte';
 	import counter from './counter.js';
 
 	export let things = ['first thing', 'second thing'];
diff --git a/test/runtime/samples/flush-before-bindings/Visibility.html b/test/runtime/samples/flush-before-bindings/Visibility.svelte
similarity index 100%
rename from test/runtime/samples/flush-before-bindings/Visibility.html
rename to test/runtime/samples/flush-before-bindings/Visibility.svelte
diff --git a/test/runtime/samples/flush-before-bindings/main.html b/test/runtime/samples/flush-before-bindings/main.svelte
similarity index 73%
rename from test/runtime/samples/flush-before-bindings/main.html
rename to test/runtime/samples/flush-before-bindings/main.svelte
index 74081c9511..326222c818 100644
--- a/test/runtime/samples/flush-before-bindings/main.html
+++ b/test/runtime/samples/flush-before-bindings/main.svelte
@@ -1,6 +1,6 @@
 <script>
 	import { beforeUpdate } from 'svelte';
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let snapshots;
 	export let visibleThings = [];
diff --git a/test/runtime/samples/function-in-expression/main.html b/test/runtime/samples/function-in-expression/main.svelte
similarity index 100%
rename from test/runtime/samples/function-in-expression/main.html
rename to test/runtime/samples/function-in-expression/main.svelte
diff --git a/test/runtime/samples/get-after-destroy/main.html b/test/runtime/samples/get-after-destroy/main.svelte
similarity index 100%
rename from test/runtime/samples/get-after-destroy/main.html
rename to test/runtime/samples/get-after-destroy/main.svelte
diff --git a/test/runtime/samples/globals-accessible-directly-process/main.html b/test/runtime/samples/globals-accessible-directly-process/main.svelte
similarity index 100%
rename from test/runtime/samples/globals-accessible-directly-process/main.html
rename to test/runtime/samples/globals-accessible-directly-process/main.svelte
diff --git a/test/runtime/samples/globals-accessible-directly/main.html b/test/runtime/samples/globals-accessible-directly/main.svelte
similarity index 100%
rename from test/runtime/samples/globals-accessible-directly/main.html
rename to test/runtime/samples/globals-accessible-directly/main.svelte
diff --git a/test/runtime/samples/globals-not-dereferenced/main.html b/test/runtime/samples/globals-not-dereferenced/main.svelte
similarity index 100%
rename from test/runtime/samples/globals-not-dereferenced/main.html
rename to test/runtime/samples/globals-not-dereferenced/main.svelte
diff --git a/test/runtime/samples/globals-not-overwritten-by-bindings/main.html b/test/runtime/samples/globals-not-overwritten-by-bindings/main.svelte
similarity index 100%
rename from test/runtime/samples/globals-not-overwritten-by-bindings/main.html
rename to test/runtime/samples/globals-not-overwritten-by-bindings/main.svelte
diff --git a/test/runtime/samples/globals-shadowed-by-data/main.html b/test/runtime/samples/globals-shadowed-by-data/main.svelte
similarity index 100%
rename from test/runtime/samples/globals-shadowed-by-data/main.html
rename to test/runtime/samples/globals-shadowed-by-data/main.svelte
diff --git a/test/runtime/samples/globals-shadowed-by-helpers/main.html b/test/runtime/samples/globals-shadowed-by-helpers/main.svelte
similarity index 100%
rename from test/runtime/samples/globals-shadowed-by-helpers/main.html
rename to test/runtime/samples/globals-shadowed-by-helpers/main.svelte
diff --git a/test/runtime/samples/hash-in-attribute/main.html b/test/runtime/samples/hash-in-attribute/main.svelte
similarity index 100%
rename from test/runtime/samples/hash-in-attribute/main.html
rename to test/runtime/samples/hash-in-attribute/main.svelte
diff --git a/test/runtime/samples/head-if-block/main.html b/test/runtime/samples/head-if-block/main.svelte
similarity index 100%
rename from test/runtime/samples/head-if-block/main.html
rename to test/runtime/samples/head-if-block/main.svelte
diff --git a/test/runtime/samples/head-title-dynamic-simple/main.html b/test/runtime/samples/head-title-dynamic-simple/main.svelte
similarity index 100%
rename from test/runtime/samples/head-title-dynamic-simple/main.html
rename to test/runtime/samples/head-title-dynamic-simple/main.svelte
diff --git a/test/runtime/samples/head-title-dynamic/main.html b/test/runtime/samples/head-title-dynamic/main.svelte
similarity index 100%
rename from test/runtime/samples/head-title-dynamic/main.html
rename to test/runtime/samples/head-title-dynamic/main.svelte
diff --git a/test/runtime/samples/head-title-static/main.html b/test/runtime/samples/head-title-static/main.svelte
similarity index 100%
rename from test/runtime/samples/head-title-static/main.html
rename to test/runtime/samples/head-title-static/main.svelte
diff --git a/test/runtime/samples/hello-world/main.html b/test/runtime/samples/hello-world/main.svelte
similarity index 100%
rename from test/runtime/samples/hello-world/main.html
rename to test/runtime/samples/hello-world/main.svelte
diff --git a/test/runtime/samples/helpers-not-call-expression/main.html b/test/runtime/samples/helpers-not-call-expression/main.svelte
similarity index 100%
rename from test/runtime/samples/helpers-not-call-expression/main.html
rename to test/runtime/samples/helpers-not-call-expression/main.svelte
diff --git a/test/runtime/samples/helpers/main.html b/test/runtime/samples/helpers/main.svelte
similarity index 100%
rename from test/runtime/samples/helpers/main.html
rename to test/runtime/samples/helpers/main.svelte
diff --git a/test/runtime/samples/html-entities-inside-elements/main.html b/test/runtime/samples/html-entities-inside-elements/main.svelte
similarity index 100%
rename from test/runtime/samples/html-entities-inside-elements/main.html
rename to test/runtime/samples/html-entities-inside-elements/main.svelte
diff --git a/test/runtime/samples/html-entities/main.html b/test/runtime/samples/html-entities/main.svelte
similarity index 100%
rename from test/runtime/samples/html-entities/main.html
rename to test/runtime/samples/html-entities/main.svelte
diff --git a/test/runtime/samples/html-non-entities-inside-elements/main.html b/test/runtime/samples/html-non-entities-inside-elements/main.svelte
similarity index 100%
rename from test/runtime/samples/html-non-entities-inside-elements/main.html
rename to test/runtime/samples/html-non-entities-inside-elements/main.svelte
diff --git a/test/runtime/samples/if-block-component-without-outro/Widget.html b/test/runtime/samples/if-block-component-without-outro/Widget.svelte
similarity index 100%
rename from test/runtime/samples/if-block-component-without-outro/Widget.html
rename to test/runtime/samples/if-block-component-without-outro/Widget.svelte
diff --git a/test/runtime/samples/if-block-component-without-outro/main.html b/test/runtime/samples/if-block-component-without-outro/main.svelte
similarity index 57%
rename from test/runtime/samples/if-block-component-without-outro/main.html
rename to test/runtime/samples/if-block-component-without-outro/main.svelte
index 45498b97a1..2efb43b030 100644
--- a/test/runtime/samples/if-block-component-without-outro/main.html
+++ b/test/runtime/samples/if-block-component-without-outro/main.svelte
@@ -1,7 +1,7 @@
 <script>
 	export let foo;
 
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 {#if foo}
diff --git a/test/runtime/samples/if-block-else-in-each/main.html b/test/runtime/samples/if-block-else-in-each/main.svelte
similarity index 100%
rename from test/runtime/samples/if-block-else-in-each/main.html
rename to test/runtime/samples/if-block-else-in-each/main.svelte
diff --git a/test/runtime/samples/if-block-else-partial-outro/Foo.html b/test/runtime/samples/if-block-else-partial-outro/Foo.svelte
similarity index 100%
rename from test/runtime/samples/if-block-else-partial-outro/Foo.html
rename to test/runtime/samples/if-block-else-partial-outro/Foo.svelte
diff --git a/test/runtime/samples/if-block-else-partial-outro/main.html b/test/runtime/samples/if-block-else-partial-outro/main.svelte
similarity index 73%
rename from test/runtime/samples/if-block-else-partial-outro/main.html
rename to test/runtime/samples/if-block-else-partial-outro/main.svelte
index 90c253c730..47f986ea48 100644
--- a/test/runtime/samples/if-block-else-partial-outro/main.html
+++ b/test/runtime/samples/if-block-else-partial-outro/main.svelte
@@ -2,7 +2,7 @@
 	export let y = false;
 	export let x = 'x';
 
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 </script>
 
 {#if y}
diff --git a/test/runtime/samples/if-block-else/main.html b/test/runtime/samples/if-block-else/main.svelte
similarity index 100%
rename from test/runtime/samples/if-block-else/main.html
rename to test/runtime/samples/if-block-else/main.svelte
diff --git a/test/runtime/samples/if-block-elseif-no-else/main.html b/test/runtime/samples/if-block-elseif-no-else/main.svelte
similarity index 100%
rename from test/runtime/samples/if-block-elseif-no-else/main.html
rename to test/runtime/samples/if-block-elseif-no-else/main.svelte
diff --git a/test/runtime/samples/if-block-elseif-text/main.html b/test/runtime/samples/if-block-elseif-text/main.svelte
similarity index 100%
rename from test/runtime/samples/if-block-elseif-text/main.html
rename to test/runtime/samples/if-block-elseif-text/main.svelte
diff --git a/test/runtime/samples/if-block-elseif/main.html b/test/runtime/samples/if-block-elseif/main.svelte
similarity index 100%
rename from test/runtime/samples/if-block-elseif/main.html
rename to test/runtime/samples/if-block-elseif/main.svelte
diff --git a/test/runtime/samples/if-block-expression/main.html b/test/runtime/samples/if-block-expression/main.svelte
similarity index 100%
rename from test/runtime/samples/if-block-expression/main.html
rename to test/runtime/samples/if-block-expression/main.svelte
diff --git a/test/runtime/samples/if-block-first/main.html b/test/runtime/samples/if-block-first/main.svelte
similarity index 100%
rename from test/runtime/samples/if-block-first/main.html
rename to test/runtime/samples/if-block-first/main.svelte
diff --git a/test/runtime/samples/if-block-no-outro-else-with-outro/Widget.html b/test/runtime/samples/if-block-no-outro-else-with-outro/Widget.svelte
similarity index 100%
rename from test/runtime/samples/if-block-no-outro-else-with-outro/Widget.html
rename to test/runtime/samples/if-block-no-outro-else-with-outro/Widget.svelte
diff --git a/test/runtime/samples/if-block-no-outro-else-with-outro/main.html b/test/runtime/samples/if-block-no-outro-else-with-outro/main.svelte
similarity index 77%
rename from test/runtime/samples/if-block-no-outro-else-with-outro/main.html
rename to test/runtime/samples/if-block-no-outro-else-with-outro/main.svelte
index 2007bf2ea2..e32a7a52cb 100644
--- a/test/runtime/samples/if-block-no-outro-else-with-outro/main.html
+++ b/test/runtime/samples/if-block-no-outro-else-with-outro/main.svelte
@@ -2,7 +2,7 @@
 	export let foo;
 	export let x = 'x';
 
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 {#if foo}
diff --git a/test/runtime/samples/if-block-or/main.html b/test/runtime/samples/if-block-or/main.svelte
similarity index 100%
rename from test/runtime/samples/if-block-or/main.html
rename to test/runtime/samples/if-block-or/main.svelte
diff --git a/test/runtime/samples/if-block-outro-nested-else/Component.html b/test/runtime/samples/if-block-outro-nested-else/Component.svelte
similarity index 100%
rename from test/runtime/samples/if-block-outro-nested-else/Component.html
rename to test/runtime/samples/if-block-outro-nested-else/Component.svelte
diff --git a/test/runtime/samples/if-block-outro-nested-else/main.html b/test/runtime/samples/if-block-outro-nested-else/main.svelte
similarity index 73%
rename from test/runtime/samples/if-block-outro-nested-else/main.html
rename to test/runtime/samples/if-block-outro-nested-else/main.svelte
index c10f861a6c..3937998c40 100644
--- a/test/runtime/samples/if-block-outro-nested-else/main.html
+++ b/test/runtime/samples/if-block-outro-nested-else/main.svelte
@@ -1,7 +1,7 @@
 <script>
 	export let foo = true;
 
-	import Component from './Component.html';
+	import Component from './Component.svelte';
 </script>
 
 {#if foo}
diff --git a/test/runtime/samples/if-block-outro-unique-select-block-type/Component.html b/test/runtime/samples/if-block-outro-unique-select-block-type/Component.svelte
similarity index 100%
rename from test/runtime/samples/if-block-outro-unique-select-block-type/Component.html
rename to test/runtime/samples/if-block-outro-unique-select-block-type/Component.svelte
diff --git a/test/runtime/samples/if-block-outro-unique-select-block-type/main.html b/test/runtime/samples/if-block-outro-unique-select-block-type/main.svelte
similarity index 76%
rename from test/runtime/samples/if-block-outro-unique-select-block-type/main.html
rename to test/runtime/samples/if-block-outro-unique-select-block-type/main.svelte
index 77b3a6dfe3..0579a562eb 100644
--- a/test/runtime/samples/if-block-outro-unique-select-block-type/main.html
+++ b/test/runtime/samples/if-block-outro-unique-select-block-type/main.svelte
@@ -1,7 +1,7 @@
 <script>
 	export let foo = true;
 
-	import Component from './Component.html';
+	import Component from './Component.svelte';
 </script>
 
 {#if foo}
diff --git a/test/runtime/samples/if-block-widget/Widget.html b/test/runtime/samples/if-block-widget/Widget.svelte
similarity index 100%
rename from test/runtime/samples/if-block-widget/Widget.html
rename to test/runtime/samples/if-block-widget/Widget.svelte
diff --git a/test/runtime/samples/if-block-widget/main.html b/test/runtime/samples/if-block-widget/main.svelte
similarity index 69%
rename from test/runtime/samples/if-block-widget/main.html
rename to test/runtime/samples/if-block-widget/main.svelte
index 12996bbcd4..fef00e276c 100644
--- a/test/runtime/samples/if-block-widget/main.html
+++ b/test/runtime/samples/if-block-widget/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let visible;
 </script>
diff --git a/test/runtime/samples/if-block/main.html b/test/runtime/samples/if-block/main.svelte
similarity index 100%
rename from test/runtime/samples/if-block/main.html
rename to test/runtime/samples/if-block/main.svelte
diff --git a/test/runtime/samples/if-in-keyed-each/main.html b/test/runtime/samples/if-in-keyed-each/main.svelte
similarity index 100%
rename from test/runtime/samples/if-in-keyed-each/main.html
rename to test/runtime/samples/if-in-keyed-each/main.svelte
diff --git a/test/runtime/samples/ignore-unchanged-attribute-compound/main.html b/test/runtime/samples/ignore-unchanged-attribute-compound/main.svelte
similarity index 100%
rename from test/runtime/samples/ignore-unchanged-attribute-compound/main.html
rename to test/runtime/samples/ignore-unchanged-attribute-compound/main.svelte
diff --git a/test/runtime/samples/ignore-unchanged-attribute/main.html b/test/runtime/samples/ignore-unchanged-attribute/main.svelte
similarity index 100%
rename from test/runtime/samples/ignore-unchanged-attribute/main.html
rename to test/runtime/samples/ignore-unchanged-attribute/main.svelte
diff --git a/test/runtime/samples/ignore-unchanged-raw/main.html b/test/runtime/samples/ignore-unchanged-raw/main.svelte
similarity index 100%
rename from test/runtime/samples/ignore-unchanged-raw/main.html
rename to test/runtime/samples/ignore-unchanged-raw/main.svelte
diff --git a/test/runtime/samples/ignore-unchanged-tag/main.html b/test/runtime/samples/ignore-unchanged-tag/main.svelte
similarity index 100%
rename from test/runtime/samples/ignore-unchanged-tag/main.html
rename to test/runtime/samples/ignore-unchanged-tag/main.svelte
diff --git a/test/runtime/samples/immutable-nested/Nested.html b/test/runtime/samples/immutable-nested/Nested.svelte
similarity index 100%
rename from test/runtime/samples/immutable-nested/Nested.html
rename to test/runtime/samples/immutable-nested/Nested.svelte
diff --git a/test/runtime/samples/immutable-nested/main.html b/test/runtime/samples/immutable-nested/main.svelte
similarity index 68%
rename from test/runtime/samples/immutable-nested/main.html
rename to test/runtime/samples/immutable-nested/main.svelte
index aa8efa9ebc..e50055be0c 100644
--- a/test/runtime/samples/immutable-nested/main.html
+++ b/test/runtime/samples/immutable-nested/main.svelte
@@ -1,7 +1,7 @@
 <script>
 	export let nested;
 
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <div>
diff --git a/test/runtime/samples/immutable-option/main.html b/test/runtime/samples/immutable-option/main.svelte
similarity index 100%
rename from test/runtime/samples/immutable-option/main.html
rename to test/runtime/samples/immutable-option/main.svelte
diff --git a/test/runtime/samples/immutable-svelte-meta-false/main.html b/test/runtime/samples/immutable-svelte-meta-false/main.svelte
similarity index 100%
rename from test/runtime/samples/immutable-svelte-meta-false/main.html
rename to test/runtime/samples/immutable-svelte-meta-false/main.svelte
diff --git a/test/runtime/samples/immutable-svelte-meta/main.html b/test/runtime/samples/immutable-svelte-meta/main.svelte
similarity index 100%
rename from test/runtime/samples/immutable-svelte-meta/main.html
rename to test/runtime/samples/immutable-svelte-meta/main.svelte
diff --git a/test/runtime/samples/imported-renamed-components/ComponentOne.html b/test/runtime/samples/imported-renamed-components/ComponentOne.svelte
similarity index 100%
rename from test/runtime/samples/imported-renamed-components/ComponentOne.html
rename to test/runtime/samples/imported-renamed-components/ComponentOne.svelte
diff --git a/test/runtime/samples/imported-renamed-components/ComponentTwo.html b/test/runtime/samples/imported-renamed-components/ComponentTwo.svelte
similarity index 100%
rename from test/runtime/samples/imported-renamed-components/ComponentTwo.html
rename to test/runtime/samples/imported-renamed-components/ComponentTwo.svelte
diff --git a/test/runtime/samples/imported-renamed-components/main.html b/test/runtime/samples/imported-renamed-components/main.svelte
similarity index 59%
rename from test/runtime/samples/imported-renamed-components/main.html
rename to test/runtime/samples/imported-renamed-components/main.svelte
index 9c6efdb230..9055a9e9a5 100644
--- a/test/runtime/samples/imported-renamed-components/main.html
+++ b/test/runtime/samples/imported-renamed-components/main.svelte
@@ -1,6 +1,6 @@
 <script>
-	import ComponentOne from './ComponentOne.html';
-	import ComponentTwo from './ComponentTwo.html';
+	import ComponentOne from './ComponentOne.svelte';
+	import ComponentTwo from './ComponentTwo.svelte';
 
 	const RenamedComponentOne = ComponentOne;
 	const RenamedComponentTwo = ComponentTwo;
diff --git a/test/runtime/samples/initial-state-assign/main.html b/test/runtime/samples/initial-state-assign/main.svelte
similarity index 100%
rename from test/runtime/samples/initial-state-assign/main.html
rename to test/runtime/samples/initial-state-assign/main.svelte
diff --git a/test/runtime/samples/inline-expressions/main.html b/test/runtime/samples/inline-expressions/main.svelte
similarity index 100%
rename from test/runtime/samples/inline-expressions/main.html
rename to test/runtime/samples/inline-expressions/main.svelte
diff --git a/test/runtime/samples/input-list/main.html b/test/runtime/samples/input-list/main.svelte
similarity index 100%
rename from test/runtime/samples/input-list/main.html
rename to test/runtime/samples/input-list/main.svelte
diff --git a/test/runtime/samples/instrumentation-script-destructuring/main.html b/test/runtime/samples/instrumentation-script-destructuring/main.svelte
similarity index 100%
rename from test/runtime/samples/instrumentation-script-destructuring/main.html
rename to test/runtime/samples/instrumentation-script-destructuring/main.svelte
diff --git a/test/runtime/samples/instrumentation-script-loop-scope/main.html b/test/runtime/samples/instrumentation-script-loop-scope/main.svelte
similarity index 100%
rename from test/runtime/samples/instrumentation-script-loop-scope/main.html
rename to test/runtime/samples/instrumentation-script-loop-scope/main.svelte
diff --git a/test/runtime/samples/instrumentation-script-multiple-assignments/main.html b/test/runtime/samples/instrumentation-script-multiple-assignments/main.svelte
similarity index 100%
rename from test/runtime/samples/instrumentation-script-multiple-assignments/main.html
rename to test/runtime/samples/instrumentation-script-multiple-assignments/main.svelte
diff --git a/test/runtime/samples/instrumentation-script-update/main.html b/test/runtime/samples/instrumentation-script-update/main.svelte
similarity index 100%
rename from test/runtime/samples/instrumentation-script-update/main.html
rename to test/runtime/samples/instrumentation-script-update/main.svelte
diff --git a/test/runtime/samples/instrumentation-template-destructuring/main.html b/test/runtime/samples/instrumentation-template-destructuring/main.svelte
similarity index 100%
rename from test/runtime/samples/instrumentation-template-destructuring/main.html
rename to test/runtime/samples/instrumentation-template-destructuring/main.svelte
diff --git a/test/runtime/samples/instrumentation-template-loop-scope/main.html b/test/runtime/samples/instrumentation-template-loop-scope/main.svelte
similarity index 100%
rename from test/runtime/samples/instrumentation-template-loop-scope/main.html
rename to test/runtime/samples/instrumentation-template-loop-scope/main.svelte
diff --git a/test/runtime/samples/instrumentation-template-multiple-assignments/main.html b/test/runtime/samples/instrumentation-template-multiple-assignments/main.svelte
similarity index 100%
rename from test/runtime/samples/instrumentation-template-multiple-assignments/main.html
rename to test/runtime/samples/instrumentation-template-multiple-assignments/main.svelte
diff --git a/test/runtime/samples/instrumentation-template-update/main.html b/test/runtime/samples/instrumentation-template-update/main.svelte
similarity index 100%
rename from test/runtime/samples/instrumentation-template-update/main.html
rename to test/runtime/samples/instrumentation-template-update/main.svelte
diff --git a/test/runtime/samples/internal-state/Foo.html b/test/runtime/samples/internal-state/Foo.svelte
similarity index 100%
rename from test/runtime/samples/internal-state/Foo.html
rename to test/runtime/samples/internal-state/Foo.svelte
diff --git a/test/runtime/samples/internal-state/main.html b/test/runtime/samples/internal-state/main.html
deleted file mode 100644
index 81151cea80..0000000000
--- a/test/runtime/samples/internal-state/main.html
+++ /dev/null
@@ -1,9 +0,0 @@
-<script>
-	import Foo from './Foo.html';
-	
-	let x = 2;
-</script>
-
-<Foo internal={x}/>
-
-<button on:click="{() => x += 1}">click me</button>
\ No newline at end of file
diff --git a/test/runtime/samples/internal-state/main.svelte b/test/runtime/samples/internal-state/main.svelte
new file mode 100644
index 0000000000..594ab3c837
--- /dev/null
+++ b/test/runtime/samples/internal-state/main.svelte
@@ -0,0 +1,9 @@
+<script>
+	import Foo from './Foo.svelte';
+	
+	let x = 2;
+</script>
+
+<Foo internal={x}/>
+
+<button on:click="{() => x += 1}">click me</button>
\ No newline at end of file
diff --git a/test/runtime/samples/lifecycle-events/main.html b/test/runtime/samples/lifecycle-events/main.svelte
similarity index 100%
rename from test/runtime/samples/lifecycle-events/main.html
rename to test/runtime/samples/lifecycle-events/main.svelte
diff --git a/test/runtime/samples/lifecycle-next-tick/main.html b/test/runtime/samples/lifecycle-next-tick/main.svelte
similarity index 100%
rename from test/runtime/samples/lifecycle-next-tick/main.html
rename to test/runtime/samples/lifecycle-next-tick/main.svelte
diff --git a/test/runtime/samples/lifecycle-render-order/main.html b/test/runtime/samples/lifecycle-render-order/main.svelte
similarity index 100%
rename from test/runtime/samples/lifecycle-render-order/main.html
rename to test/runtime/samples/lifecycle-render-order/main.svelte
diff --git a/test/runtime/samples/module-context-with-instance-script/main.html b/test/runtime/samples/module-context-with-instance-script/main.svelte
similarity index 100%
rename from test/runtime/samples/module-context-with-instance-script/main.html
rename to test/runtime/samples/module-context-with-instance-script/main.svelte
diff --git a/test/runtime/samples/module-context/main.html b/test/runtime/samples/module-context/main.svelte
similarity index 100%
rename from test/runtime/samples/module-context/main.html
rename to test/runtime/samples/module-context/main.svelte
diff --git a/test/runtime/samples/mutation-tracking-across-sibling-scopes/main.html b/test/runtime/samples/mutation-tracking-across-sibling-scopes/main.svelte
similarity index 100%
rename from test/runtime/samples/mutation-tracking-across-sibling-scopes/main.html
rename to test/runtime/samples/mutation-tracking-across-sibling-scopes/main.svelte
diff --git a/test/runtime/samples/names-deconflicted-nested/main.html b/test/runtime/samples/names-deconflicted-nested/main.svelte
similarity index 100%
rename from test/runtime/samples/names-deconflicted-nested/main.html
rename to test/runtime/samples/names-deconflicted-nested/main.svelte
diff --git a/test/runtime/samples/names-deconflicted/Widget.html b/test/runtime/samples/names-deconflicted/Widget.svelte
similarity index 100%
rename from test/runtime/samples/names-deconflicted/Widget.html
rename to test/runtime/samples/names-deconflicted/Widget.svelte
diff --git a/test/runtime/samples/names-deconflicted/main.html b/test/runtime/samples/names-deconflicted/main.svelte
similarity index 82%
rename from test/runtime/samples/names-deconflicted/main.html
rename to test/runtime/samples/names-deconflicted/main.svelte
index f2c47a7718..60e3ea1320 100644
--- a/test/runtime/samples/names-deconflicted/main.html
+++ b/test/runtime/samples/names-deconflicted/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let widgets = [
 		{ name: 'foo' },
diff --git a/test/runtime/samples/nbsp/main.html b/test/runtime/samples/nbsp/main.svelte
similarity index 100%
rename from test/runtime/samples/nbsp/main.html
rename to test/runtime/samples/nbsp/main.svelte
diff --git a/test/runtime/samples/nested-transition-detach-each/main.html b/test/runtime/samples/nested-transition-detach-each/main.svelte
similarity index 100%
rename from test/runtime/samples/nested-transition-detach-each/main.html
rename to test/runtime/samples/nested-transition-detach-each/main.svelte
diff --git a/test/runtime/samples/nested-transition-detach-if-false/Folder.html b/test/runtime/samples/nested-transition-detach-if-false/Folder.svelte
similarity index 100%
rename from test/runtime/samples/nested-transition-detach-if-false/Folder.html
rename to test/runtime/samples/nested-transition-detach-if-false/Folder.svelte
diff --git a/test/runtime/samples/nested-transition-detach-if-false/main.html b/test/runtime/samples/nested-transition-detach-if-false/main.html
deleted file mode 100644
index d52c56c5cf..0000000000
--- a/test/runtime/samples/nested-transition-detach-if-false/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	export let folder;
-
-	import Folder from './Folder.html';
-</script>
-
-<Folder bind:this={folder} dir="a"/>
\ No newline at end of file
diff --git a/test/runtime/samples/nested-transition-detach-if-false/main.svelte b/test/runtime/samples/nested-transition-detach-if-false/main.svelte
new file mode 100644
index 0000000000..2a7a4b49bf
--- /dev/null
+++ b/test/runtime/samples/nested-transition-detach-if-false/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	export let folder;
+
+	import Folder from './Folder.svelte';
+</script>
+
+<Folder bind:this={folder} dir="a"/>
\ No newline at end of file
diff --git a/test/runtime/samples/nested-transition-if-block-not-remounted/Span.html b/test/runtime/samples/nested-transition-if-block-not-remounted/Span.svelte
similarity index 100%
rename from test/runtime/samples/nested-transition-if-block-not-remounted/Span.html
rename to test/runtime/samples/nested-transition-if-block-not-remounted/Span.svelte
diff --git a/test/runtime/samples/nested-transition-if-block-not-remounted/main.html b/test/runtime/samples/nested-transition-if-block-not-remounted/main.svelte
similarity index 75%
rename from test/runtime/samples/nested-transition-if-block-not-remounted/main.html
rename to test/runtime/samples/nested-transition-if-block-not-remounted/main.svelte
index 373d3d0485..e6456a86f6 100644
--- a/test/runtime/samples/nested-transition-if-block-not-remounted/main.html
+++ b/test/runtime/samples/nested-transition-if-block-not-remounted/main.svelte
@@ -1,7 +1,7 @@
 <script>
 	export let x;
 
-	import Span from './Span.html';
+	import Span from './Span.svelte';
 </script>
 
 <div>
diff --git a/test/runtime/samples/noscript-removal/main.html b/test/runtime/samples/noscript-removal/main.svelte
similarity index 100%
rename from test/runtime/samples/noscript-removal/main.html
rename to test/runtime/samples/noscript-removal/main.svelte
diff --git a/test/runtime/samples/ondestroy-before-cleanup/Top.html b/test/runtime/samples/ondestroy-before-cleanup/Top.svelte
similarity index 100%
rename from test/runtime/samples/ondestroy-before-cleanup/Top.html
rename to test/runtime/samples/ondestroy-before-cleanup/Top.svelte
diff --git a/test/runtime/samples/ondestroy-before-cleanup/main.html b/test/runtime/samples/ondestroy-before-cleanup/main.svelte
similarity index 74%
rename from test/runtime/samples/ondestroy-before-cleanup/main.html
rename to test/runtime/samples/ondestroy-before-cleanup/main.svelte
index 34053dd613..efd940053e 100644
--- a/test/runtime/samples/ondestroy-before-cleanup/main.html
+++ b/test/runtime/samples/ondestroy-before-cleanup/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Top from './Top.html';
+	import Top from './Top.svelte';
 
 	export let top;
 	export let visible = true;
diff --git a/test/runtime/samples/onmount-async/main.html b/test/runtime/samples/onmount-async/main.svelte
similarity index 100%
rename from test/runtime/samples/onmount-async/main.html
rename to test/runtime/samples/onmount-async/main.svelte
diff --git a/test/runtime/samples/onmount-fires-when-ready-nested/ParentWidget.html b/test/runtime/samples/onmount-fires-when-ready-nested/ParentWidget.svelte
similarity index 64%
rename from test/runtime/samples/onmount-fires-when-ready-nested/ParentWidget.html
rename to test/runtime/samples/onmount-fires-when-ready-nested/ParentWidget.svelte
index e1dc10c773..5fc663d98f 100644
--- a/test/runtime/samples/onmount-fires-when-ready-nested/ParentWidget.html
+++ b/test/runtime/samples/onmount-fires-when-ready-nested/ParentWidget.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let foo;
 </script>
diff --git a/test/runtime/samples/onmount-fires-when-ready-nested/Widget.html b/test/runtime/samples/onmount-fires-when-ready-nested/Widget.svelte
similarity index 100%
rename from test/runtime/samples/onmount-fires-when-ready-nested/Widget.html
rename to test/runtime/samples/onmount-fires-when-ready-nested/Widget.svelte
diff --git a/test/runtime/samples/onmount-fires-when-ready-nested/main.html b/test/runtime/samples/onmount-fires-when-ready-nested/main.html
deleted file mode 100644
index 910f63e086..0000000000
--- a/test/runtime/samples/onmount-fires-when-ready-nested/main.html
+++ /dev/null
@@ -1,9 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-	import ParentWidget from './ParentWidget.html';
-</script>
-
-<div>
-	<Widget/>
-	<ParentWidget />
-</div>
diff --git a/test/runtime/samples/onmount-fires-when-ready-nested/main.svelte b/test/runtime/samples/onmount-fires-when-ready-nested/main.svelte
new file mode 100644
index 0000000000..a155293e26
--- /dev/null
+++ b/test/runtime/samples/onmount-fires-when-ready-nested/main.svelte
@@ -0,0 +1,9 @@
+<script>
+	import Widget from './Widget.svelte';
+	import ParentWidget from './ParentWidget.svelte';
+</script>
+
+<div>
+	<Widget/>
+	<ParentWidget />
+</div>
diff --git a/test/runtime/samples/onmount-fires-when-ready/Widget.html b/test/runtime/samples/onmount-fires-when-ready/Widget.svelte
similarity index 100%
rename from test/runtime/samples/onmount-fires-when-ready/Widget.html
rename to test/runtime/samples/onmount-fires-when-ready/Widget.svelte
diff --git a/test/runtime/samples/onmount-fires-when-ready/main.html b/test/runtime/samples/onmount-fires-when-ready/main.svelte
similarity index 70%
rename from test/runtime/samples/onmount-fires-when-ready/main.html
rename to test/runtime/samples/onmount-fires-when-ready/main.svelte
index f2760ecff1..1204ac6719 100644
--- a/test/runtime/samples/onmount-fires-when-ready/main.html
+++ b/test/runtime/samples/onmount-fires-when-ready/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let foo;
 </script>
diff --git a/test/runtime/samples/onmount-sibling-order/Nested.html b/test/runtime/samples/onmount-sibling-order/Nested.svelte
similarity index 100%
rename from test/runtime/samples/onmount-sibling-order/Nested.html
rename to test/runtime/samples/onmount-sibling-order/Nested.svelte
diff --git a/test/runtime/samples/onmount-sibling-order/main.html b/test/runtime/samples/onmount-sibling-order/main.html
deleted file mode 100644
index e4218aa4b4..0000000000
--- a/test/runtime/samples/onmount-sibling-order/main.html
+++ /dev/null
@@ -1,6 +0,0 @@
-<script>
-	import Nested from './Nested.html';
-</script>
-
-<Nested name='foo'/>
-<Nested name='bar'/>
\ No newline at end of file
diff --git a/test/runtime/samples/onmount-sibling-order/main.svelte b/test/runtime/samples/onmount-sibling-order/main.svelte
new file mode 100644
index 0000000000..3fbf499755
--- /dev/null
+++ b/test/runtime/samples/onmount-sibling-order/main.svelte
@@ -0,0 +1,6 @@
+<script>
+	import Nested from './Nested.svelte';
+</script>
+
+<Nested name='foo'/>
+<Nested name='bar'/>
\ No newline at end of file
diff --git a/test/runtime/samples/option-without-select/main.html b/test/runtime/samples/option-without-select/main.svelte
similarity index 100%
rename from test/runtime/samples/option-without-select/main.html
rename to test/runtime/samples/option-without-select/main.svelte
diff --git a/test/runtime/samples/paren-wrapped-expressions/main.html b/test/runtime/samples/paren-wrapped-expressions/main.svelte
similarity index 100%
rename from test/runtime/samples/paren-wrapped-expressions/main.html
rename to test/runtime/samples/paren-wrapped-expressions/main.svelte
diff --git a/test/runtime/samples/preload/main.html b/test/runtime/samples/preload/main.svelte
similarity index 100%
rename from test/runtime/samples/preload/main.html
rename to test/runtime/samples/preload/main.svelte
diff --git a/test/runtime/samples/prop-not-action/Nested.html b/test/runtime/samples/prop-not-action/Nested.svelte
similarity index 100%
rename from test/runtime/samples/prop-not-action/Nested.html
rename to test/runtime/samples/prop-not-action/Nested.svelte
diff --git a/test/runtime/samples/prop-not-action/main.html b/test/runtime/samples/prop-not-action/main.html
deleted file mode 100644
index c0ddd01e79..0000000000
--- a/test/runtime/samples/prop-not-action/main.html
+++ /dev/null
@@ -1,6 +0,0 @@
-<script>
-	import Nested from './Nested.html';
-	export let currentUser;
-</script>
-
-<Nested user={currentUser}/>
\ No newline at end of file
diff --git a/test/runtime/samples/prop-not-action/main.svelte b/test/runtime/samples/prop-not-action/main.svelte
new file mode 100644
index 0000000000..e1c40bc070
--- /dev/null
+++ b/test/runtime/samples/prop-not-action/main.svelte
@@ -0,0 +1,6 @@
+<script>
+	import Nested from './Nested.svelte';
+	export let currentUser;
+</script>
+
+<Nested user={currentUser}/>
\ No newline at end of file
diff --git a/test/runtime/samples/prop-without-semicolon-b/main.html b/test/runtime/samples/prop-without-semicolon-b/main.svelte
similarity index 100%
rename from test/runtime/samples/prop-without-semicolon-b/main.html
rename to test/runtime/samples/prop-without-semicolon-b/main.svelte
diff --git a/test/runtime/samples/prop-without-semicolon/main.html b/test/runtime/samples/prop-without-semicolon/main.svelte
similarity index 100%
rename from test/runtime/samples/prop-without-semicolon/main.html
rename to test/runtime/samples/prop-without-semicolon/main.svelte
diff --git a/test/runtime/samples/raw-anchor-first-child/main.html b/test/runtime/samples/raw-anchor-first-child/main.svelte
similarity index 100%
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rename to test/runtime/samples/raw-anchor-first-child/main.svelte
diff --git a/test/runtime/samples/raw-anchor-first-last-child/main.html b/test/runtime/samples/raw-anchor-first-last-child/main.svelte
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diff --git a/test/runtime/samples/raw-anchor-last-child/main.html b/test/runtime/samples/raw-anchor-last-child/main.svelte
similarity index 100%
rename from test/runtime/samples/raw-anchor-last-child/main.html
rename to test/runtime/samples/raw-anchor-last-child/main.svelte
diff --git a/test/runtime/samples/raw-anchor-next-previous-sibling/main.html b/test/runtime/samples/raw-anchor-next-previous-sibling/main.svelte
similarity index 100%
rename from test/runtime/samples/raw-anchor-next-previous-sibling/main.html
rename to test/runtime/samples/raw-anchor-next-previous-sibling/main.svelte
diff --git a/test/runtime/samples/raw-anchor-next-sibling/main.html b/test/runtime/samples/raw-anchor-next-sibling/main.svelte
similarity index 100%
rename from test/runtime/samples/raw-anchor-next-sibling/main.html
rename to test/runtime/samples/raw-anchor-next-sibling/main.svelte
diff --git a/test/runtime/samples/raw-anchor-previous-sibling/main.html b/test/runtime/samples/raw-anchor-previous-sibling/main.svelte
similarity index 100%
rename from test/runtime/samples/raw-anchor-previous-sibling/main.html
rename to test/runtime/samples/raw-anchor-previous-sibling/main.svelte
diff --git a/test/runtime/samples/raw-mustaches-preserved/main.html b/test/runtime/samples/raw-mustaches-preserved/main.svelte
similarity index 100%
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diff --git a/test/runtime/samples/raw-mustaches/main.html b/test/runtime/samples/raw-mustaches/main.svelte
similarity index 100%
rename from test/runtime/samples/raw-mustaches/main.html
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diff --git a/test/runtime/samples/reactive-function/main.html b/test/runtime/samples/reactive-function/main.svelte
similarity index 100%
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rename to test/runtime/samples/reactive-function/main.svelte
diff --git a/test/runtime/samples/reactive-values-deconflicted/main.html b/test/runtime/samples/reactive-values-deconflicted/main.svelte
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diff --git a/test/runtime/samples/reactive-values-function-dependency/main.html b/test/runtime/samples/reactive-values-function-dependency/main.svelte
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rename to test/runtime/samples/reactive-values-function-dependency/main.svelte
diff --git a/test/runtime/samples/reactive-values-implicit/main.html b/test/runtime/samples/reactive-values-implicit/main.svelte
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rename from test/runtime/samples/reactive-values-implicit/main.html
rename to test/runtime/samples/reactive-values-implicit/main.svelte
diff --git a/test/runtime/samples/reactive-values-non-cyclical/main.html b/test/runtime/samples/reactive-values-non-cyclical/main.svelte
similarity index 100%
rename from test/runtime/samples/reactive-values-non-cyclical/main.html
rename to test/runtime/samples/reactive-values-non-cyclical/main.svelte
diff --git a/test/runtime/samples/reactive-values-readonly/main.html b/test/runtime/samples/reactive-values-readonly/main.svelte
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rename from test/runtime/samples/reactive-values-readonly/main.html
rename to test/runtime/samples/reactive-values-readonly/main.svelte
diff --git a/test/runtime/samples/reactive-values-second-order/main.html b/test/runtime/samples/reactive-values-second-order/main.svelte
similarity index 100%
rename from test/runtime/samples/reactive-values-second-order/main.html
rename to test/runtime/samples/reactive-values-second-order/main.svelte
diff --git a/test/runtime/samples/reactive-values-self-dependency/main.html b/test/runtime/samples/reactive-values-self-dependency/main.svelte
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rename to test/runtime/samples/reactive-values-self-dependency/main.svelte
diff --git a/test/runtime/samples/reactive-values/main.html b/test/runtime/samples/reactive-values/main.svelte
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rename to test/runtime/samples/reactive-values/main.svelte
diff --git a/test/runtime/samples/script-style-non-top-level/main.html b/test/runtime/samples/script-style-non-top-level/main.svelte
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rename from test/runtime/samples/script-style-non-top-level/main.html
rename to test/runtime/samples/script-style-non-top-level/main.svelte
diff --git a/test/runtime/samples/select-bind-array/main.html b/test/runtime/samples/select-bind-array/main.svelte
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rename to test/runtime/samples/select-bind-array/main.svelte
diff --git a/test/runtime/samples/select-bind-in-array/main.html b/test/runtime/samples/select-bind-in-array/main.svelte
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rename from test/runtime/samples/select-bind-in-array/main.html
rename to test/runtime/samples/select-bind-in-array/main.svelte
diff --git a/test/runtime/samples/select-change-handler/main.html b/test/runtime/samples/select-change-handler/main.svelte
similarity index 100%
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rename to test/runtime/samples/select-change-handler/main.svelte
diff --git a/test/runtime/samples/select-no-whitespace/main.html b/test/runtime/samples/select-no-whitespace/main.svelte
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diff --git a/test/runtime/samples/select-one-way-bind-object/main.html b/test/runtime/samples/select-one-way-bind-object/main.svelte
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rename from test/runtime/samples/select-one-way-bind-object/main.html
rename to test/runtime/samples/select-one-way-bind-object/main.svelte
diff --git a/test/runtime/samples/select-one-way-bind/main.html b/test/runtime/samples/select-one-way-bind/main.svelte
similarity index 100%
rename from test/runtime/samples/select-one-way-bind/main.html
rename to test/runtime/samples/select-one-way-bind/main.svelte
diff --git a/test/runtime/samples/select-props/main.html b/test/runtime/samples/select-props/main.svelte
similarity index 100%
rename from test/runtime/samples/select-props/main.html
rename to test/runtime/samples/select-props/main.svelte
diff --git a/test/runtime/samples/select/main.html b/test/runtime/samples/select/main.svelte
similarity index 100%
rename from test/runtime/samples/select/main.html
rename to test/runtime/samples/select/main.svelte
diff --git a/test/runtime/samples/self-reference-tree/main.html b/test/runtime/samples/self-reference-tree/main.svelte
similarity index 100%
rename from test/runtime/samples/self-reference-tree/main.html
rename to test/runtime/samples/self-reference-tree/main.svelte
diff --git a/test/runtime/samples/self-reference/main.html b/test/runtime/samples/self-reference/main.svelte
similarity index 100%
rename from test/runtime/samples/self-reference/main.html
rename to test/runtime/samples/self-reference/main.svelte
diff --git a/test/runtime/samples/set-after-destroy/main.html b/test/runtime/samples/set-after-destroy/main.svelte
similarity index 100%
rename from test/runtime/samples/set-after-destroy/main.html
rename to test/runtime/samples/set-after-destroy/main.svelte
diff --git a/test/runtime/samples/set-in-oncreate/main.html b/test/runtime/samples/set-in-oncreate/main.svelte
similarity index 100%
rename from test/runtime/samples/set-in-oncreate/main.html
rename to test/runtime/samples/set-in-oncreate/main.svelte
diff --git a/test/runtime/samples/set-in-onstate-dedupes-renders/Widget.html b/test/runtime/samples/set-in-onstate-dedupes-renders/Widget.svelte
similarity index 100%
rename from test/runtime/samples/set-in-onstate-dedupes-renders/Widget.html
rename to test/runtime/samples/set-in-onstate-dedupes-renders/Widget.svelte
diff --git a/test/runtime/samples/set-in-onstate-dedupes-renders/main.html b/test/runtime/samples/set-in-onstate-dedupes-renders/main.svelte
similarity index 83%
rename from test/runtime/samples/set-in-onstate-dedupes-renders/main.html
rename to test/runtime/samples/set-in-onstate-dedupes-renders/main.svelte
index d6fe905c3b..cf87944bb8 100644
--- a/test/runtime/samples/set-in-onstate-dedupes-renders/main.html
+++ b/test/runtime/samples/set-in-onstate-dedupes-renders/main.svelte
@@ -1,7 +1,7 @@
 <script>
 	import { beforeUpdate } from 'svelte';
 
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let foo = { x: 1 };
 	export let bar = { x: 1 };
diff --git a/test/runtime/samples/set-in-onstate/main.html b/test/runtime/samples/set-in-onstate/main.svelte
similarity index 100%
rename from test/runtime/samples/set-in-onstate/main.html
rename to test/runtime/samples/set-in-onstate/main.svelte
diff --git a/test/runtime/samples/set-null-text-node/main.html b/test/runtime/samples/set-null-text-node/main.svelte
similarity index 100%
rename from test/runtime/samples/set-null-text-node/main.html
rename to test/runtime/samples/set-null-text-node/main.svelte
diff --git a/test/runtime/samples/set-prevents-loop/Foo.html b/test/runtime/samples/set-prevents-loop/Foo.svelte
similarity index 100%
rename from test/runtime/samples/set-prevents-loop/Foo.html
rename to test/runtime/samples/set-prevents-loop/Foo.svelte
diff --git a/test/runtime/samples/set-prevents-loop/main.html b/test/runtime/samples/set-prevents-loop/main.svelte
similarity index 81%
rename from test/runtime/samples/set-prevents-loop/main.html
rename to test/runtime/samples/set-prevents-loop/main.svelte
index 890e81db7b..f946037ee6 100644
--- a/test/runtime/samples/set-prevents-loop/main.html
+++ b/test/runtime/samples/set-prevents-loop/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 
 	export let visible = true;
 	export let answer = 42;
diff --git a/test/runtime/samples/set-undefined-attr/main.html b/test/runtime/samples/set-undefined-attr/main.svelte
similarity index 100%
rename from test/runtime/samples/set-undefined-attr/main.html
rename to test/runtime/samples/set-undefined-attr/main.svelte
diff --git a/test/runtime/samples/sigil-component-attribute/Widget.html b/test/runtime/samples/sigil-component-attribute/Widget.svelte
similarity index 100%
rename from test/runtime/samples/sigil-component-attribute/Widget.html
rename to test/runtime/samples/sigil-component-attribute/Widget.svelte
diff --git a/test/runtime/samples/sigil-component-attribute/main.html b/test/runtime/samples/sigil-component-attribute/main.svelte
similarity index 65%
rename from test/runtime/samples/sigil-component-attribute/main.html
rename to test/runtime/samples/sigil-component-attribute/main.svelte
index 93ff1b8fe6..07c36d3a41 100644
--- a/test/runtime/samples/sigil-component-attribute/main.html
+++ b/test/runtime/samples/sigil-component-attribute/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 	export let foo;
 </script>
 
diff --git a/test/runtime/samples/sigil-static-#/main.html b/test/runtime/samples/sigil-static-#/main.svelte
similarity index 100%
rename from test/runtime/samples/sigil-static-#/main.html
rename to test/runtime/samples/sigil-static-#/main.svelte
diff --git a/test/runtime/samples/sigil-static-@/main.html b/test/runtime/samples/sigil-static-@/main.svelte
similarity index 100%
rename from test/runtime/samples/sigil-static-@/main.html
rename to test/runtime/samples/sigil-static-@/main.svelte
diff --git a/test/runtime/samples/single-static-element/main.html b/test/runtime/samples/single-static-element/main.svelte
similarity index 100%
rename from test/runtime/samples/single-static-element/main.html
rename to test/runtime/samples/single-static-element/main.svelte
diff --git a/test/runtime/samples/single-text-node/main.html b/test/runtime/samples/single-text-node/main.svelte
similarity index 100%
rename from test/runtime/samples/single-text-node/main.html
rename to test/runtime/samples/single-text-node/main.svelte
diff --git a/test/runtime/samples/slot-in-custom-element/main.html b/test/runtime/samples/slot-in-custom-element/main.svelte
similarity index 100%
rename from test/runtime/samples/slot-in-custom-element/main.html
rename to test/runtime/samples/slot-in-custom-element/main.svelte
diff --git a/test/runtime/samples/spread-component-dynamic-undefined/main.html b/test/runtime/samples/spread-component-dynamic-undefined/main.svelte
similarity index 100%
rename from test/runtime/samples/spread-component-dynamic-undefined/main.html
rename to test/runtime/samples/spread-component-dynamic-undefined/main.svelte
diff --git a/test/runtime/samples/spread-component-dynamic/Foo.html b/test/runtime/samples/spread-component-dynamic/Foo.svelte
similarity index 100%
rename from test/runtime/samples/spread-component-dynamic/Foo.html
rename to test/runtime/samples/spread-component-dynamic/Foo.svelte
diff --git a/test/runtime/samples/spread-component-dynamic/main.html b/test/runtime/samples/spread-component-dynamic/main.html
deleted file mode 100644
index 4b83ee5307..0000000000
--- a/test/runtime/samples/spread-component-dynamic/main.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Foo from './Foo.html';
-
-	export let props;
-</script>
-
-<svelte:component this={Foo} {...props} />
\ No newline at end of file
diff --git a/test/runtime/samples/spread-component-dynamic/main.svelte b/test/runtime/samples/spread-component-dynamic/main.svelte
new file mode 100644
index 0000000000..879a5c2cd5
--- /dev/null
+++ b/test/runtime/samples/spread-component-dynamic/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Foo from './Foo.svelte';
+
+	export let props;
+</script>
+
+<svelte:component this={Foo} {...props} />
\ No newline at end of file
diff --git a/test/runtime/samples/spread-component-multiple-dependencies/Widget.html b/test/runtime/samples/spread-component-multiple-dependencies/Widget.svelte
similarity index 100%
rename from test/runtime/samples/spread-component-multiple-dependencies/Widget.html
rename to test/runtime/samples/spread-component-multiple-dependencies/Widget.svelte
diff --git a/test/runtime/samples/spread-component-multiple-dependencies/main.html b/test/runtime/samples/spread-component-multiple-dependencies/main.svelte
similarity index 80%
rename from test/runtime/samples/spread-component-multiple-dependencies/main.html
rename to test/runtime/samples/spread-component-multiple-dependencies/main.svelte
index 79ed1d2974..a60043391a 100644
--- a/test/runtime/samples/spread-component-multiple-dependencies/main.html
+++ b/test/runtime/samples/spread-component-multiple-dependencies/main.svelte
@@ -4,7 +4,7 @@
 	export let b = 'b';
 	export let bar = { baz: 'baz' };
 
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 <Widget foo={foo ? a : b} {...bar}/>
diff --git a/test/runtime/samples/spread-component-with-bind/Widget.html b/test/runtime/samples/spread-component-with-bind/Widget.svelte
similarity index 100%
rename from test/runtime/samples/spread-component-with-bind/Widget.html
rename to test/runtime/samples/spread-component-with-bind/Widget.svelte
diff --git a/test/runtime/samples/spread-component-with-bind/main.html b/test/runtime/samples/spread-component-with-bind/main.html
deleted file mode 100644
index e4c81624fd..0000000000
--- a/test/runtime/samples/spread-component-with-bind/main.html
+++ /dev/null
@@ -1,8 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-
-	export let props = {};
-	export let x = 'foo';
-</script>
-
-<svelte:component this={Widget} {...props} bind:value={x} />
\ No newline at end of file
diff --git a/test/runtime/samples/spread-component-with-bind/main.svelte b/test/runtime/samples/spread-component-with-bind/main.svelte
new file mode 100644
index 0000000000..98375e2348
--- /dev/null
+++ b/test/runtime/samples/spread-component-with-bind/main.svelte
@@ -0,0 +1,8 @@
+<script>
+	import Widget from './Widget.svelte';
+
+	export let props = {};
+	export let x = 'foo';
+</script>
+
+<svelte:component this={Widget} {...props} bind:value={x} />
\ No newline at end of file
diff --git a/test/runtime/samples/spread-component/Widget.html b/test/runtime/samples/spread-component/Widget.svelte
similarity index 100%
rename from test/runtime/samples/spread-component/Widget.html
rename to test/runtime/samples/spread-component/Widget.svelte
diff --git a/test/runtime/samples/spread-component/main.html b/test/runtime/samples/spread-component/main.svelte
similarity index 69%
rename from test/runtime/samples/spread-component/main.html
rename to test/runtime/samples/spread-component/main.svelte
index 351a7964ef..3ca281903e 100644
--- a/test/runtime/samples/spread-component/main.html
+++ b/test/runtime/samples/spread-component/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let props;
 </script>
diff --git a/test/runtime/samples/spread-each-component/Nested.html b/test/runtime/samples/spread-each-component/Nested.svelte
similarity index 100%
rename from test/runtime/samples/spread-each-component/Nested.html
rename to test/runtime/samples/spread-each-component/Nested.svelte
diff --git a/test/runtime/samples/spread-each-component/main.html b/test/runtime/samples/spread-each-component/main.svelte
similarity index 65%
rename from test/runtime/samples/spread-each-component/main.html
rename to test/runtime/samples/spread-each-component/main.svelte
index 2124861160..f8c0cebaba 100644
--- a/test/runtime/samples/spread-each-component/main.html
+++ b/test/runtime/samples/spread-each-component/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 
 	export let things;
 </script>
diff --git a/test/runtime/samples/spread-each-element/main.html b/test/runtime/samples/spread-each-element/main.svelte
similarity index 100%
rename from test/runtime/samples/spread-each-element/main.html
rename to test/runtime/samples/spread-each-element/main.svelte
diff --git a/test/runtime/samples/spread-element-boolean/main.html b/test/runtime/samples/spread-element-boolean/main.svelte
similarity index 100%
rename from test/runtime/samples/spread-element-boolean/main.html
rename to test/runtime/samples/spread-element-boolean/main.svelte
diff --git a/test/runtime/samples/spread-element-input/main.html b/test/runtime/samples/spread-element-input/main.svelte
similarity index 100%
rename from test/runtime/samples/spread-element-input/main.html
rename to test/runtime/samples/spread-element-input/main.svelte
diff --git a/test/runtime/samples/spread-element-multiple-dependencies/main.html b/test/runtime/samples/spread-element-multiple-dependencies/main.svelte
similarity index 100%
rename from test/runtime/samples/spread-element-multiple-dependencies/main.html
rename to test/runtime/samples/spread-element-multiple-dependencies/main.svelte
diff --git a/test/runtime/samples/spread-element-multiple/main.html b/test/runtime/samples/spread-element-multiple/main.svelte
similarity index 100%
rename from test/runtime/samples/spread-element-multiple/main.html
rename to test/runtime/samples/spread-element-multiple/main.svelte
diff --git a/test/runtime/samples/spread-element/main.html b/test/runtime/samples/spread-element/main.svelte
similarity index 100%
rename from test/runtime/samples/spread-element/main.html
rename to test/runtime/samples/spread-element/main.svelte
diff --git a/test/runtime/samples/spread-own-props/Widget.html b/test/runtime/samples/spread-own-props/Widget.svelte
similarity index 100%
rename from test/runtime/samples/spread-own-props/Widget.html
rename to test/runtime/samples/spread-own-props/Widget.svelte
diff --git a/test/runtime/samples/spread-own-props/main.html b/test/runtime/samples/spread-own-props/main.svelte
similarity index 73%
rename from test/runtime/samples/spread-own-props/main.html
rename to test/runtime/samples/spread-own-props/main.svelte
index 79afded90e..5fbd75d663 100644
--- a/test/runtime/samples/spread-own-props/main.html
+++ b/test/runtime/samples/spread-own-props/main.svelte
@@ -1,7 +1,7 @@
 <svelte:options bind:props/>
 
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	let props;
 </script>
diff --git a/test/runtime/samples/state-deconflicted/main.html b/test/runtime/samples/state-deconflicted/main.svelte
similarity index 100%
rename from test/runtime/samples/state-deconflicted/main.html
rename to test/runtime/samples/state-deconflicted/main.svelte
diff --git a/test/runtime/samples/store-auto-subscribe-implicit/main.html b/test/runtime/samples/store-auto-subscribe-implicit/main.svelte
similarity index 100%
rename from test/runtime/samples/store-auto-subscribe-implicit/main.html
rename to test/runtime/samples/store-auto-subscribe-implicit/main.svelte
diff --git a/test/runtime/samples/store-auto-subscribe-in-each/main.html b/test/runtime/samples/store-auto-subscribe-in-each/main.svelte
similarity index 100%
rename from test/runtime/samples/store-auto-subscribe-in-each/main.html
rename to test/runtime/samples/store-auto-subscribe-in-each/main.svelte
diff --git a/test/runtime/samples/store-auto-subscribe-in-reactive-declaration/main.html b/test/runtime/samples/store-auto-subscribe-in-reactive-declaration/main.svelte
similarity index 100%
rename from test/runtime/samples/store-auto-subscribe-in-reactive-declaration/main.html
rename to test/runtime/samples/store-auto-subscribe-in-reactive-declaration/main.svelte
diff --git a/test/runtime/samples/store-auto-subscribe-in-script/main.html b/test/runtime/samples/store-auto-subscribe-in-script/main.svelte
similarity index 100%
rename from test/runtime/samples/store-auto-subscribe-in-script/main.html
rename to test/runtime/samples/store-auto-subscribe-in-script/main.svelte
diff --git a/test/runtime/samples/store-auto-subscribe/main.html b/test/runtime/samples/store-auto-subscribe/main.svelte
similarity index 100%
rename from test/runtime/samples/store-auto-subscribe/main.html
rename to test/runtime/samples/store-auto-subscribe/main.svelte
diff --git a/test/runtime/samples/store-dev-mode-error/main.html b/test/runtime/samples/store-dev-mode-error/main.svelte
similarity index 100%
rename from test/runtime/samples/store-dev-mode-error/main.html
rename to test/runtime/samples/store-dev-mode-error/main.svelte
diff --git a/test/runtime/samples/store-prevent-user-declarations/main.html b/test/runtime/samples/store-prevent-user-declarations/main.svelte
similarity index 100%
rename from test/runtime/samples/store-prevent-user-declarations/main.html
rename to test/runtime/samples/store-prevent-user-declarations/main.svelte
diff --git a/test/runtime/samples/svg-attributes/main.html b/test/runtime/samples/svg-attributes/main.svelte
similarity index 100%
rename from test/runtime/samples/svg-attributes/main.html
rename to test/runtime/samples/svg-attributes/main.svelte
diff --git a/test/runtime/samples/svg-child-component-declared-namespace-shorthand/Rect.html b/test/runtime/samples/svg-child-component-declared-namespace-shorthand/Rect.svelte
similarity index 100%
rename from test/runtime/samples/svg-child-component-declared-namespace-shorthand/Rect.html
rename to test/runtime/samples/svg-child-component-declared-namespace-shorthand/Rect.svelte
diff --git a/test/runtime/samples/svg-child-component-declared-namespace/main.html b/test/runtime/samples/svg-child-component-declared-namespace-shorthand/main.svelte
similarity index 82%
rename from test/runtime/samples/svg-child-component-declared-namespace/main.html
rename to test/runtime/samples/svg-child-component-declared-namespace-shorthand/main.svelte
index 9e82368dbc..aa65b2b453 100644
--- a/test/runtime/samples/svg-child-component-declared-namespace/main.html
+++ b/test/runtime/samples/svg-child-component-declared-namespace-shorthand/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Rect from './Rect.html';
+	import Rect from './Rect.svelte';
 
 	export let x;
 	export let y;
diff --git a/test/runtime/samples/svg-child-component-declared-namespace/Rect.html b/test/runtime/samples/svg-child-component-declared-namespace/Rect.svelte
similarity index 100%
rename from test/runtime/samples/svg-child-component-declared-namespace/Rect.html
rename to test/runtime/samples/svg-child-component-declared-namespace/Rect.svelte
diff --git a/test/runtime/samples/svg-child-component-declared-namespace-shorthand/main.html b/test/runtime/samples/svg-child-component-declared-namespace/main.svelte
similarity index 82%
rename from test/runtime/samples/svg-child-component-declared-namespace-shorthand/main.html
rename to test/runtime/samples/svg-child-component-declared-namespace/main.svelte
index 9e82368dbc..aa65b2b453 100644
--- a/test/runtime/samples/svg-child-component-declared-namespace-shorthand/main.html
+++ b/test/runtime/samples/svg-child-component-declared-namespace/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Rect from './Rect.html';
+	import Rect from './Rect.svelte';
 
 	export let x;
 	export let y;
diff --git a/test/runtime/samples/svg-class/main.html b/test/runtime/samples/svg-class/main.svelte
similarity index 100%
rename from test/runtime/samples/svg-class/main.html
rename to test/runtime/samples/svg-class/main.svelte
diff --git a/test/runtime/samples/svg-each-block-anchor/main.html b/test/runtime/samples/svg-each-block-anchor/main.svelte
similarity index 100%
rename from test/runtime/samples/svg-each-block-anchor/main.html
rename to test/runtime/samples/svg-each-block-anchor/main.svelte
diff --git a/test/runtime/samples/svg-each-block-namespace/main.html b/test/runtime/samples/svg-each-block-namespace/main.svelte
similarity index 100%
rename from test/runtime/samples/svg-each-block-namespace/main.html
rename to test/runtime/samples/svg-each-block-namespace/main.svelte
diff --git a/test/runtime/samples/svg-multiple/main.html b/test/runtime/samples/svg-multiple/main.svelte
similarity index 100%
rename from test/runtime/samples/svg-multiple/main.html
rename to test/runtime/samples/svg-multiple/main.svelte
diff --git a/test/runtime/samples/svg-no-whitespace/main.html b/test/runtime/samples/svg-no-whitespace/main.svelte
similarity index 100%
rename from test/runtime/samples/svg-no-whitespace/main.html
rename to test/runtime/samples/svg-no-whitespace/main.svelte
diff --git a/test/runtime/samples/svg-with-style/main.html b/test/runtime/samples/svg-with-style/main.svelte
similarity index 100%
rename from test/runtime/samples/svg-with-style/main.html
rename to test/runtime/samples/svg-with-style/main.svelte
diff --git a/test/runtime/samples/svg-xlink/main.html b/test/runtime/samples/svg-xlink/main.svelte
similarity index 100%
rename from test/runtime/samples/svg-xlink/main.html
rename to test/runtime/samples/svg-xlink/main.svelte
diff --git a/test/runtime/samples/svg-xmlns/main.html b/test/runtime/samples/svg-xmlns/main.svelte
similarity index 100%
rename from test/runtime/samples/svg-xmlns/main.html
rename to test/runtime/samples/svg-xmlns/main.svelte
diff --git a/test/runtime/samples/svg/main.html b/test/runtime/samples/svg/main.svelte
similarity index 100%
rename from test/runtime/samples/svg/main.html
rename to test/runtime/samples/svg/main.svelte
diff --git a/test/runtime/samples/template/main.html b/test/runtime/samples/template/main.svelte
similarity index 100%
rename from test/runtime/samples/template/main.html
rename to test/runtime/samples/template/main.svelte
diff --git a/test/runtime/samples/textarea-children/main.html b/test/runtime/samples/textarea-children/main.svelte
similarity index 100%
rename from test/runtime/samples/textarea-children/main.html
rename to test/runtime/samples/textarea-children/main.svelte
diff --git a/test/runtime/samples/textarea-value/main.html b/test/runtime/samples/textarea-value/main.svelte
similarity index 100%
rename from test/runtime/samples/textarea-value/main.html
rename to test/runtime/samples/textarea-value/main.svelte
diff --git a/test/runtime/samples/transition-css-deferred-removal/main.html b/test/runtime/samples/transition-css-deferred-removal/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-css-deferred-removal/main.html
rename to test/runtime/samples/transition-css-deferred-removal/main.svelte
diff --git a/test/runtime/samples/transition-css-duration/main.html b/test/runtime/samples/transition-css-duration/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-css-duration/main.html
rename to test/runtime/samples/transition-css-duration/main.svelte
diff --git a/test/runtime/samples/transition-css-in-out-in/main.html b/test/runtime/samples/transition-css-in-out-in/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-css-in-out-in/main.html
rename to test/runtime/samples/transition-css-in-out-in/main.svelte
diff --git a/test/runtime/samples/transition-js-aborted-outro-in-each/main.html b/test/runtime/samples/transition-js-aborted-outro-in-each/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-aborted-outro-in-each/main.html
rename to test/runtime/samples/transition-js-aborted-outro-in-each/main.svelte
diff --git a/test/runtime/samples/transition-js-aborted-outro/main.html b/test/runtime/samples/transition-js-aborted-outro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-aborted-outro/main.html
rename to test/runtime/samples/transition-js-aborted-outro/main.svelte
diff --git a/test/runtime/samples/transition-js-args/main.html b/test/runtime/samples/transition-js-args/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-args/main.html
rename to test/runtime/samples/transition-js-args/main.svelte
diff --git a/test/runtime/samples/transition-js-await-block/main.html b/test/runtime/samples/transition-js-await-block/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-await-block/main.html
rename to test/runtime/samples/transition-js-await-block/main.svelte
diff --git a/test/runtime/samples/transition-js-context/main.html b/test/runtime/samples/transition-js-context/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-context/main.html
rename to test/runtime/samples/transition-js-context/main.svelte
diff --git a/test/runtime/samples/transition-js-deferred/main.html b/test/runtime/samples/transition-js-deferred/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-deferred/main.html
rename to test/runtime/samples/transition-js-deferred/main.svelte
diff --git a/test/runtime/samples/transition-js-delay-in-out/main.html b/test/runtime/samples/transition-js-delay-in-out/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-delay-in-out/main.html
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diff --git a/test/runtime/samples/transition-js-delay/main.html b/test/runtime/samples/transition-js-delay/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-delay/main.html
rename to test/runtime/samples/transition-js-delay/main.svelte
diff --git a/test/runtime/samples/transition-js-destroyed-before-end/main.html b/test/runtime/samples/transition-js-destroyed-before-end/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-destroyed-before-end/main.html
rename to test/runtime/samples/transition-js-destroyed-before-end/main.svelte
diff --git a/test/runtime/samples/transition-js-dynamic-component/A.html b/test/runtime/samples/transition-js-dynamic-component/A.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-dynamic-component/A.html
rename to test/runtime/samples/transition-js-dynamic-component/A.svelte
diff --git a/test/runtime/samples/transition-js-dynamic-component/B.html b/test/runtime/samples/transition-js-dynamic-component/B.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-dynamic-component/B.html
rename to test/runtime/samples/transition-js-dynamic-component/B.svelte
diff --git a/test/runtime/samples/transition-js-dynamic-component/main.html b/test/runtime/samples/transition-js-dynamic-component/main.html
deleted file mode 100644
index 85c88d9442..0000000000
--- a/test/runtime/samples/transition-js-dynamic-component/main.html
+++ /dev/null
@@ -1,8 +0,0 @@
-<script>
-	import A from './A.html';
-	import B from './B.html';
-
-	export let x;
-</script>
-
-<svelte:component this="{x ? A : B}"/>
\ No newline at end of file
diff --git a/test/runtime/samples/transition-js-dynamic-component/main.svelte b/test/runtime/samples/transition-js-dynamic-component/main.svelte
new file mode 100644
index 0000000000..08697ec1a9
--- /dev/null
+++ b/test/runtime/samples/transition-js-dynamic-component/main.svelte
@@ -0,0 +1,8 @@
+<script>
+	import A from './A.svelte';
+	import B from './B.svelte';
+
+	export let x;
+</script>
+
+<svelte:component this="{x ? A : B}"/>
\ No newline at end of file
diff --git a/test/runtime/samples/transition-js-dynamic-if-block-bidi/main.html b/test/runtime/samples/transition-js-dynamic-if-block-bidi/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-dynamic-if-block-bidi/main.html
rename to test/runtime/samples/transition-js-dynamic-if-block-bidi/main.svelte
diff --git a/test/runtime/samples/transition-js-each-block-intro-outro/main.html b/test/runtime/samples/transition-js-each-block-intro-outro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-each-block-intro-outro/main.html
rename to test/runtime/samples/transition-js-each-block-intro-outro/main.svelte
diff --git a/test/runtime/samples/transition-js-each-block-intro/main.html b/test/runtime/samples/transition-js-each-block-intro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-each-block-intro/main.html
rename to test/runtime/samples/transition-js-each-block-intro/main.svelte
diff --git a/test/runtime/samples/transition-js-each-block-keyed-intro-outro/main.html b/test/runtime/samples/transition-js-each-block-keyed-intro-outro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-each-block-keyed-intro-outro/main.html
rename to test/runtime/samples/transition-js-each-block-keyed-intro-outro/main.svelte
diff --git a/test/runtime/samples/transition-js-each-block-keyed-intro/main.html b/test/runtime/samples/transition-js-each-block-keyed-intro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-each-block-keyed-intro/main.html
rename to test/runtime/samples/transition-js-each-block-keyed-intro/main.svelte
diff --git a/test/runtime/samples/transition-js-each-block-keyed-outro/main.html b/test/runtime/samples/transition-js-each-block-keyed-outro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-each-block-keyed-outro/main.html
rename to test/runtime/samples/transition-js-each-block-keyed-outro/main.svelte
diff --git a/test/runtime/samples/transition-js-each-block-outro/main.html b/test/runtime/samples/transition-js-each-block-outro/main.svelte
similarity index 100%
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diff --git a/test/runtime/samples/transition-js-each-keyed-unchanged/main.html b/test/runtime/samples/transition-js-each-keyed-unchanged/main.svelte
similarity index 100%
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rename to test/runtime/samples/transition-js-each-keyed-unchanged/main.svelte
diff --git a/test/runtime/samples/transition-js-each-unchanged/main.html b/test/runtime/samples/transition-js-each-unchanged/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-each-unchanged/main.html
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diff --git a/test/runtime/samples/transition-js-events/main.html b/test/runtime/samples/transition-js-events/main.svelte
similarity index 100%
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rename to test/runtime/samples/transition-js-events/main.svelte
diff --git a/test/runtime/samples/transition-js-if-block-bidi/main.html b/test/runtime/samples/transition-js-if-block-bidi/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-if-block-bidi/main.html
rename to test/runtime/samples/transition-js-if-block-bidi/main.svelte
diff --git a/test/runtime/samples/transition-js-if-block-in-each-block-bidi-2/main.html b/test/runtime/samples/transition-js-if-block-in-each-block-bidi-2/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-if-block-in-each-block-bidi-2/main.html
rename to test/runtime/samples/transition-js-if-block-in-each-block-bidi-2/main.svelte
diff --git a/test/runtime/samples/transition-js-if-block-in-each-block-bidi-3/main.html b/test/runtime/samples/transition-js-if-block-in-each-block-bidi-3/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-if-block-in-each-block-bidi-3/main.html
rename to test/runtime/samples/transition-js-if-block-in-each-block-bidi-3/main.svelte
diff --git a/test/runtime/samples/transition-js-if-block-in-each-block-bidi/main.html b/test/runtime/samples/transition-js-if-block-in-each-block-bidi/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-if-block-in-each-block-bidi/main.html
rename to test/runtime/samples/transition-js-if-block-in-each-block-bidi/main.svelte
diff --git a/test/runtime/samples/transition-js-if-block-intro-outro/main.html b/test/runtime/samples/transition-js-if-block-intro-outro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-if-block-intro-outro/main.html
rename to test/runtime/samples/transition-js-if-block-intro-outro/main.svelte
diff --git a/test/runtime/samples/transition-js-if-block-intro/main.html b/test/runtime/samples/transition-js-if-block-intro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-if-block-intro/main.html
rename to test/runtime/samples/transition-js-if-block-intro/main.svelte
diff --git a/test/runtime/samples/transition-js-if-block-outro-timeout/main.html b/test/runtime/samples/transition-js-if-block-outro-timeout/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-if-block-outro-timeout/main.html
rename to test/runtime/samples/transition-js-if-block-outro-timeout/main.svelte
diff --git a/test/runtime/samples/transition-js-if-else-block-dynamic-outro/main.html b/test/runtime/samples/transition-js-if-else-block-dynamic-outro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-if-else-block-dynamic-outro/main.html
rename to test/runtime/samples/transition-js-if-else-block-dynamic-outro/main.svelte
diff --git a/test/runtime/samples/transition-js-if-else-block-intro/main.html b/test/runtime/samples/transition-js-if-else-block-intro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-if-else-block-intro/main.html
rename to test/runtime/samples/transition-js-if-else-block-intro/main.svelte
diff --git a/test/runtime/samples/transition-js-if-else-block-outro/main.html b/test/runtime/samples/transition-js-if-else-block-outro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-if-else-block-outro/main.html
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diff --git a/test/runtime/samples/transition-js-if-elseif-block-outro/main.html b/test/runtime/samples/transition-js-if-elseif-block-outro/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-if-elseif-block-outro/main.html
rename to test/runtime/samples/transition-js-if-elseif-block-outro/main.svelte
diff --git a/test/runtime/samples/transition-js-initial/main.html b/test/runtime/samples/transition-js-initial/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-initial/main.html
rename to test/runtime/samples/transition-js-initial/main.svelte
diff --git a/test/runtime/samples/transition-js-intro-enabled-by-option/main.html b/test/runtime/samples/transition-js-intro-enabled-by-option/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-intro-enabled-by-option/main.html
rename to test/runtime/samples/transition-js-intro-enabled-by-option/main.svelte
diff --git a/test/runtime/samples/transition-js-intro-skipped-by-default-nested/Widget.html b/test/runtime/samples/transition-js-intro-skipped-by-default-nested/Widget.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-intro-skipped-by-default-nested/Widget.html
rename to test/runtime/samples/transition-js-intro-skipped-by-default-nested/Widget.svelte
diff --git a/test/runtime/samples/transition-js-intro-skipped-by-default-nested/main.html b/test/runtime/samples/transition-js-intro-skipped-by-default-nested/main.html
deleted file mode 100644
index cbcde3f1ed..0000000000
--- a/test/runtime/samples/transition-js-intro-skipped-by-default-nested/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-</script>
-
-<Widget/>
\ No newline at end of file
diff --git a/test/runtime/samples/transition-js-intro-skipped-by-default-nested/main.svelte b/test/runtime/samples/transition-js-intro-skipped-by-default-nested/main.svelte
new file mode 100644
index 0000000000..0a9d5bba87
--- /dev/null
+++ b/test/runtime/samples/transition-js-intro-skipped-by-default-nested/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Widget from './Widget.svelte';
+</script>
+
+<Widget/>
\ No newline at end of file
diff --git a/test/runtime/samples/transition-js-intro-skipped-by-default/main.html b/test/runtime/samples/transition-js-intro-skipped-by-default/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-intro-skipped-by-default/main.html
rename to test/runtime/samples/transition-js-intro-skipped-by-default/main.svelte
diff --git a/test/runtime/samples/transition-js-local-and-global/main.html b/test/runtime/samples/transition-js-local-and-global/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-local-and-global/main.html
rename to test/runtime/samples/transition-js-local-and-global/main.svelte
diff --git a/test/runtime/samples/transition-js-local-nested-await/main.html b/test/runtime/samples/transition-js-local-nested-await/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-local-nested-await/main.html
rename to test/runtime/samples/transition-js-local-nested-await/main.svelte
diff --git a/test/runtime/samples/transition-js-local-nested-component/Widget.html b/test/runtime/samples/transition-js-local-nested-component/Widget.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-local-nested-component/Widget.html
rename to test/runtime/samples/transition-js-local-nested-component/Widget.svelte
diff --git a/test/runtime/samples/transition-js-local-nested-component/main.html b/test/runtime/samples/transition-js-local-nested-component/main.svelte
similarity index 55%
rename from test/runtime/samples/transition-js-local-nested-component/main.html
rename to test/runtime/samples/transition-js-local-nested-component/main.svelte
index 2eb867a667..761ef9d860 100644
--- a/test/runtime/samples/transition-js-local-nested-component/main.html
+++ b/test/runtime/samples/transition-js-local-nested-component/main.svelte
@@ -1,7 +1,7 @@
 <script>
 	export let x;
 
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 {#if x}
diff --git a/test/runtime/samples/transition-js-local-nested-each-keyed/main.html b/test/runtime/samples/transition-js-local-nested-each-keyed/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-local-nested-each-keyed/main.html
rename to test/runtime/samples/transition-js-local-nested-each-keyed/main.svelte
diff --git a/test/runtime/samples/transition-js-local-nested-each/main.html b/test/runtime/samples/transition-js-local-nested-each/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-local-nested-each/main.html
rename to test/runtime/samples/transition-js-local-nested-each/main.svelte
diff --git a/test/runtime/samples/transition-js-local-nested-if/main.html b/test/runtime/samples/transition-js-local-nested-if/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-local-nested-if/main.html
rename to test/runtime/samples/transition-js-local-nested-if/main.svelte
diff --git a/test/runtime/samples/transition-js-local/main.html b/test/runtime/samples/transition-js-local/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-local/main.html
rename to test/runtime/samples/transition-js-local/main.svelte
diff --git a/test/runtime/samples/transition-js-nested-await/main.html b/test/runtime/samples/transition-js-nested-await/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-nested-await/main.html
rename to test/runtime/samples/transition-js-nested-await/main.svelte
diff --git a/test/runtime/samples/transition-js-nested-component/Widget.html b/test/runtime/samples/transition-js-nested-component/Widget.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-nested-component/Widget.html
rename to test/runtime/samples/transition-js-nested-component/Widget.svelte
diff --git a/test/runtime/samples/transition-js-nested-component/main.html b/test/runtime/samples/transition-js-nested-component/main.svelte
similarity index 55%
rename from test/runtime/samples/transition-js-nested-component/main.html
rename to test/runtime/samples/transition-js-nested-component/main.svelte
index b4b3beccd8..8cfaa3bf02 100644
--- a/test/runtime/samples/transition-js-nested-component/main.html
+++ b/test/runtime/samples/transition-js-nested-component/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let x;
 </script>
diff --git a/test/runtime/samples/transition-js-nested-each-delete/main.html b/test/runtime/samples/transition-js-nested-each-delete/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-nested-each-delete/main.html
rename to test/runtime/samples/transition-js-nested-each-delete/main.svelte
diff --git a/test/runtime/samples/transition-js-nested-each-keyed-2/Widget.html b/test/runtime/samples/transition-js-nested-each-keyed-2/Widget.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-nested-each-keyed-2/Widget.html
rename to test/runtime/samples/transition-js-nested-each-keyed-2/Widget.svelte
diff --git a/test/runtime/samples/transition-js-nested-each-keyed-2/main.html b/test/runtime/samples/transition-js-nested-each-keyed-2/main.svelte
similarity index 65%
rename from test/runtime/samples/transition-js-nested-each-keyed-2/main.html
rename to test/runtime/samples/transition-js-nested-each-keyed-2/main.svelte
index 11096498cb..8a8ef57576 100644
--- a/test/runtime/samples/transition-js-nested-each-keyed-2/main.html
+++ b/test/runtime/samples/transition-js-nested-each-keyed-2/main.svelte
@@ -2,7 +2,7 @@
 	export let x;
 	export let things;
 
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 {#if x}
diff --git a/test/runtime/samples/transition-js-nested-each-keyed/main.html b/test/runtime/samples/transition-js-nested-each-keyed/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-nested-each-keyed/main.html
rename to test/runtime/samples/transition-js-nested-each-keyed/main.svelte
diff --git a/test/runtime/samples/transition-js-nested-each/main.html b/test/runtime/samples/transition-js-nested-each/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-nested-each/main.html
rename to test/runtime/samples/transition-js-nested-each/main.svelte
diff --git a/test/runtime/samples/transition-js-nested-if/main.html b/test/runtime/samples/transition-js-nested-if/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-nested-if/main.html
rename to test/runtime/samples/transition-js-nested-if/main.svelte
diff --git a/test/runtime/samples/transition-js-nested-intro/Child.html b/test/runtime/samples/transition-js-nested-intro/Child.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-nested-intro/Child.html
rename to test/runtime/samples/transition-js-nested-intro/Child.svelte
diff --git a/test/runtime/samples/transition-js-nested-intro/main.html b/test/runtime/samples/transition-js-nested-intro/main.svelte
similarity index 65%
rename from test/runtime/samples/transition-js-nested-intro/main.html
rename to test/runtime/samples/transition-js-nested-intro/main.svelte
index f222940ad5..5ae29bee7b 100644
--- a/test/runtime/samples/transition-js-nested-intro/main.html
+++ b/test/runtime/samples/transition-js-nested-intro/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Child from './Child.html';
+	import Child from './Child.svelte';
 	export let visible;
 </script>
 
diff --git a/test/runtime/samples/transition-js-parameterised-with-state/main.html b/test/runtime/samples/transition-js-parameterised-with-state/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-parameterised-with-state/main.html
rename to test/runtime/samples/transition-js-parameterised-with-state/main.svelte
diff --git a/test/runtime/samples/transition-js-parameterised/main.html b/test/runtime/samples/transition-js-parameterised/main.svelte
similarity index 100%
rename from test/runtime/samples/transition-js-parameterised/main.html
rename to test/runtime/samples/transition-js-parameterised/main.svelte
diff --git a/test/runtime/samples/whitespace-each-block/main.html b/test/runtime/samples/whitespace-each-block/main.svelte
similarity index 100%
rename from test/runtime/samples/whitespace-each-block/main.html
rename to test/runtime/samples/whitespace-each-block/main.svelte
diff --git a/test/runtime/samples/whitespace-list/main.html b/test/runtime/samples/whitespace-list/main.svelte
similarity index 100%
rename from test/runtime/samples/whitespace-list/main.html
rename to test/runtime/samples/whitespace-list/main.svelte
diff --git a/test/runtime/samples/whitespace-normal/main.html b/test/runtime/samples/whitespace-normal/main.svelte
similarity index 100%
rename from test/runtime/samples/whitespace-normal/main.html
rename to test/runtime/samples/whitespace-normal/main.svelte
diff --git a/test/runtime/samples/window-bind-scroll-update/main.html b/test/runtime/samples/window-bind-scroll-update/main.svelte
similarity index 100%
rename from test/runtime/samples/window-bind-scroll-update/main.html
rename to test/runtime/samples/window-bind-scroll-update/main.svelte
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similarity index 100%
rename from test/runtime/samples/window-binding-multiple-handlers/main.html
rename to test/runtime/samples/window-binding-multiple-handlers/main.svelte
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rename from test/runtime/samples/window-binding-resize/main.html
rename to test/runtime/samples/window-binding-resize/main.svelte
diff --git a/test/runtime/samples/window-event-context/main.html b/test/runtime/samples/window-event-context/main.svelte
similarity index 100%
rename from test/runtime/samples/window-event-context/main.html
rename to test/runtime/samples/window-event-context/main.svelte
diff --git a/test/runtime/samples/window-event-custom/main.html b/test/runtime/samples/window-event-custom/main.svelte
similarity index 100%
rename from test/runtime/samples/window-event-custom/main.html
rename to test/runtime/samples/window-event-custom/main.svelte
diff --git a/test/runtime/samples/window-event/main.html b/test/runtime/samples/window-event/main.svelte
similarity index 100%
rename from test/runtime/samples/window-event/main.html
rename to test/runtime/samples/window-event/main.svelte
diff --git a/test/server-side-rendering/samples/attribute-boolean/_expected.html b/test/server-side-rendering/samples/attribute-boolean/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/attribute-boolean/_expected.html
rename to test/server-side-rendering/samples/attribute-boolean/_expected.svelte
diff --git a/test/server-side-rendering/samples/attribute-boolean/main.html b/test/server-side-rendering/samples/attribute-boolean/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/attribute-boolean/main.html
rename to test/server-side-rendering/samples/attribute-boolean/main.svelte
diff --git a/test/server-side-rendering/samples/attribute-dynamic/_expected.html b/test/server-side-rendering/samples/attribute-dynamic/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/attribute-dynamic/_expected.html
rename to test/server-side-rendering/samples/attribute-dynamic/_expected.svelte
diff --git a/test/server-side-rendering/samples/attribute-dynamic/main.html b/test/server-side-rendering/samples/attribute-dynamic/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/attribute-dynamic/main.html
rename to test/server-side-rendering/samples/attribute-dynamic/main.svelte
diff --git a/test/server-side-rendering/samples/attribute-escaped-quotes-spread/_expected.html b/test/server-side-rendering/samples/attribute-escaped-quotes-spread/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/attribute-escaped-quotes-spread/_expected.html
rename to test/server-side-rendering/samples/attribute-escaped-quotes-spread/_expected.svelte
diff --git a/test/server-side-rendering/samples/attribute-escaped-quotes-spread/main.html b/test/server-side-rendering/samples/attribute-escaped-quotes-spread/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/attribute-escaped-quotes-spread/main.html
rename to test/server-side-rendering/samples/attribute-escaped-quotes-spread/main.svelte
diff --git a/test/server-side-rendering/samples/attribute-escaped-quotes/_expected.html b/test/server-side-rendering/samples/attribute-escaped-quotes/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/attribute-escaped-quotes/_expected.html
rename to test/server-side-rendering/samples/attribute-escaped-quotes/_expected.svelte
diff --git a/test/server-side-rendering/samples/attribute-escaped-quotes/main.html b/test/server-side-rendering/samples/attribute-escaped-quotes/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/attribute-escaped-quotes/main.html
rename to test/server-side-rendering/samples/attribute-escaped-quotes/main.svelte
diff --git a/test/server-side-rendering/samples/attribute-static/_expected.html b/test/server-side-rendering/samples/attribute-static/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/attribute-static/_expected.html
rename to test/server-side-rendering/samples/attribute-static/_expected.svelte
diff --git a/test/server-side-rendering/samples/attribute-static/main.html b/test/server-side-rendering/samples/attribute-static/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/attribute-static/main.html
rename to test/server-side-rendering/samples/attribute-static/main.svelte
diff --git a/test/server-side-rendering/samples/bindings/_expected.html b/test/server-side-rendering/samples/bindings/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/bindings/_expected.html
rename to test/server-side-rendering/samples/bindings/_expected.svelte
diff --git a/test/server-side-rendering/samples/bindings/main.html b/test/server-side-rendering/samples/bindings/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/bindings/main.html
rename to test/server-side-rendering/samples/bindings/main.svelte
diff --git a/test/server-side-rendering/samples/comment/_expected.html b/test/server-side-rendering/samples/comment/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/comment/_expected.html
rename to test/server-side-rendering/samples/comment/_expected.svelte
diff --git a/test/server-side-rendering/samples/comment/main.html b/test/server-side-rendering/samples/comment/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/comment/main.html
rename to test/server-side-rendering/samples/comment/main.svelte
diff --git a/test/server-side-rendering/samples/component-binding-renamed/Foo.html b/test/server-side-rendering/samples/component-binding-renamed/Foo.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-binding-renamed/Foo.html
rename to test/server-side-rendering/samples/component-binding-renamed/Foo.svelte
diff --git a/test/server-side-rendering/samples/component-binding-renamed/_expected.html b/test/server-side-rendering/samples/component-binding-renamed/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-binding-renamed/_expected.html
rename to test/server-side-rendering/samples/component-binding-renamed/_expected.svelte
diff --git a/test/server-side-rendering/samples/component-binding-renamed/main.html b/test/server-side-rendering/samples/component-binding-renamed/main.svelte
similarity index 69%
rename from test/server-side-rendering/samples/component-binding-renamed/main.html
rename to test/server-side-rendering/samples/component-binding-renamed/main.svelte
index 5c8af5f2ea..927239e1ec 100644
--- a/test/server-side-rendering/samples/component-binding-renamed/main.html
+++ b/test/server-side-rendering/samples/component-binding-renamed/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 
 	export let x;
 	export let y;
diff --git a/test/server-side-rendering/samples/component-binding/Foo.html b/test/server-side-rendering/samples/component-binding/Foo.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-binding/Foo.html
rename to test/server-side-rendering/samples/component-binding/Foo.svelte
diff --git a/test/server-side-rendering/samples/component-binding/_expected.html b/test/server-side-rendering/samples/component-binding/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-binding/_expected.html
rename to test/server-side-rendering/samples/component-binding/_expected.svelte
diff --git a/test/server-side-rendering/samples/component-binding/main.html b/test/server-side-rendering/samples/component-binding/main.svelte
similarity index 62%
rename from test/server-side-rendering/samples/component-binding/main.html
rename to test/server-side-rendering/samples/component-binding/main.svelte
index c8742a5843..c7f2d56566 100644
--- a/test/server-side-rendering/samples/component-binding/main.html
+++ b/test/server-side-rendering/samples/component-binding/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 
 	export let x;
 </script>
diff --git a/test/server-side-rendering/samples/component-data-dynamic/Widget.html b/test/server-side-rendering/samples/component-data-dynamic/Widget.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-data-dynamic/Widget.html
rename to test/server-side-rendering/samples/component-data-dynamic/Widget.svelte
diff --git a/test/server-side-rendering/samples/component-data-dynamic/_expected.html b/test/server-side-rendering/samples/component-data-dynamic/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-data-dynamic/_expected.html
rename to test/server-side-rendering/samples/component-data-dynamic/_expected.svelte
diff --git a/test/server-side-rendering/samples/component-data-dynamic/main.html b/test/server-side-rendering/samples/component-data-dynamic/main.svelte
similarity index 83%
rename from test/server-side-rendering/samples/component-data-dynamic/main.html
rename to test/server-side-rendering/samples/component-data-dynamic/main.svelte
index 74998f4742..ce7f22d6ea 100644
--- a/test/server-side-rendering/samples/component-data-dynamic/main.html
+++ b/test/server-side-rendering/samples/component-data-dynamic/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let bar;
 	export let x;
diff --git a/test/server-side-rendering/samples/component-data-empty/Widget.html b/test/server-side-rendering/samples/component-data-empty/Widget.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-data-empty/Widget.html
rename to test/server-side-rendering/samples/component-data-empty/Widget.svelte
diff --git a/test/server-side-rendering/samples/component-data-empty/_expected.html b/test/server-side-rendering/samples/component-data-empty/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-data-empty/_expected.html
rename to test/server-side-rendering/samples/component-data-empty/_expected.svelte
diff --git a/test/server-side-rendering/samples/component-data-empty/main.html b/test/server-side-rendering/samples/component-data-empty/main.svelte
similarity index 56%
rename from test/server-side-rendering/samples/component-data-empty/main.html
rename to test/server-side-rendering/samples/component-data-empty/main.svelte
index 478bcff0a1..472429d7f6 100644
--- a/test/server-side-rendering/samples/component-data-empty/main.html
+++ b/test/server-side-rendering/samples/component-data-empty/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 <div>
diff --git a/test/server-side-rendering/samples/component-refs-and-attributes/Widget.html b/test/server-side-rendering/samples/component-refs-and-attributes/Widget.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-refs-and-attributes/Widget.html
rename to test/server-side-rendering/samples/component-refs-and-attributes/Widget.svelte
diff --git a/test/server-side-rendering/samples/component-refs-and-attributes/_expected.html b/test/server-side-rendering/samples/component-refs-and-attributes/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-refs-and-attributes/_expected.html
rename to test/server-side-rendering/samples/component-refs-and-attributes/_expected.svelte
diff --git a/test/server-side-rendering/samples/component-refs-and-attributes/main.html b/test/server-side-rendering/samples/component-refs-and-attributes/main.svelte
similarity index 74%
rename from test/server-side-rendering/samples/component-refs-and-attributes/main.html
rename to test/server-side-rendering/samples/component-refs-and-attributes/main.svelte
index 8192bdf402..5c86521df5 100644
--- a/test/server-side-rendering/samples/component-refs-and-attributes/main.html
+++ b/test/server-side-rendering/samples/component-refs-and-attributes/main.svelte
@@ -1,7 +1,7 @@
 <script>
 	export let widget;
 
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let foo = 42;
 </script>
diff --git a/test/server-side-rendering/samples/component-refs/Widget.html b/test/server-side-rendering/samples/component-refs/Widget.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-refs/Widget.html
rename to test/server-side-rendering/samples/component-refs/Widget.svelte
diff --git a/test/server-side-rendering/samples/component-refs/_expected.html b/test/server-side-rendering/samples/component-refs/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-refs/_expected.html
rename to test/server-side-rendering/samples/component-refs/_expected.svelte
diff --git a/test/server-side-rendering/samples/component-refs/main.html b/test/server-side-rendering/samples/component-refs/main.svelte
similarity index 67%
rename from test/server-side-rendering/samples/component-refs/main.html
rename to test/server-side-rendering/samples/component-refs/main.svelte
index 96b3d15de4..6ec0bc5438 100644
--- a/test/server-side-rendering/samples/component-refs/main.html
+++ b/test/server-side-rendering/samples/component-refs/main.svelte
@@ -1,7 +1,7 @@
 <script>
 	export let widget;
 
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 <div><Widget bind:this={widget}/></div>
diff --git a/test/server-side-rendering/samples/component-with-different-extension/_expected.html b/test/server-side-rendering/samples/component-with-different-extension/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-with-different-extension/_expected.html
rename to test/server-side-rendering/samples/component-with-different-extension/_expected.svelte
diff --git a/test/server-side-rendering/samples/component-yield/Widget.html b/test/server-side-rendering/samples/component-yield/Widget.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-yield/Widget.html
rename to test/server-side-rendering/samples/component-yield/Widget.svelte
diff --git a/test/server-side-rendering/samples/component-yield/_expected.html b/test/server-side-rendering/samples/component-yield/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component-yield/_expected.html
rename to test/server-side-rendering/samples/component-yield/_expected.svelte
diff --git a/test/server-side-rendering/samples/component-yield/main.html b/test/server-side-rendering/samples/component-yield/main.svelte
similarity index 69%
rename from test/server-side-rendering/samples/component-yield/main.html
rename to test/server-side-rendering/samples/component-yield/main.svelte
index 9c2f573c91..2dbd669a78 100644
--- a/test/server-side-rendering/samples/component-yield/main.html
+++ b/test/server-side-rendering/samples/component-yield/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 
 	export let data = 'Hello';
 </script>
diff --git a/test/server-side-rendering/samples/component/Widget.html b/test/server-side-rendering/samples/component/Widget.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component/Widget.html
rename to test/server-side-rendering/samples/component/Widget.svelte
diff --git a/test/server-side-rendering/samples/component/_expected.html b/test/server-side-rendering/samples/component/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/component/_expected.html
rename to test/server-side-rendering/samples/component/_expected.svelte
diff --git a/test/server-side-rendering/samples/component/main.html b/test/server-side-rendering/samples/component/main.svelte
similarity index 53%
rename from test/server-side-rendering/samples/component/main.html
rename to test/server-side-rendering/samples/component/main.svelte
index ecb4297a40..ac0b429163 100644
--- a/test/server-side-rendering/samples/component/main.html
+++ b/test/server-side-rendering/samples/component/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 <div>
diff --git a/test/server-side-rendering/samples/computed/_expected.html b/test/server-side-rendering/samples/computed/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/computed/_expected.html
rename to test/server-side-rendering/samples/computed/_expected.svelte
diff --git a/test/server-side-rendering/samples/computed/main.html b/test/server-side-rendering/samples/computed/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/computed/main.html
rename to test/server-side-rendering/samples/computed/main.svelte
diff --git a/test/server-side-rendering/samples/default-data-override/_expected.html b/test/server-side-rendering/samples/default-data-override/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/default-data-override/_expected.html
rename to test/server-side-rendering/samples/default-data-override/_expected.svelte
diff --git a/test/server-side-rendering/samples/default-data-override/main.html b/test/server-side-rendering/samples/default-data-override/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/default-data-override/main.html
rename to test/server-side-rendering/samples/default-data-override/main.svelte
diff --git a/test/server-side-rendering/samples/default-data/_expected.html b/test/server-side-rendering/samples/default-data/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/default-data/_expected.html
rename to test/server-side-rendering/samples/default-data/_expected.svelte
diff --git a/test/server-side-rendering/samples/default-data/main.html b/test/server-side-rendering/samples/default-data/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/default-data/main.html
rename to test/server-side-rendering/samples/default-data/main.svelte
diff --git a/test/server-side-rendering/samples/directives/_expected.html b/test/server-side-rendering/samples/directives/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/directives/_expected.html
rename to test/server-side-rendering/samples/directives/_expected.svelte
diff --git a/test/server-side-rendering/samples/directives/main.html b/test/server-side-rendering/samples/directives/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/directives/main.html
rename to test/server-side-rendering/samples/directives/main.svelte
diff --git a/test/server-side-rendering/samples/dynamic-text-escaped/_expected.html b/test/server-side-rendering/samples/dynamic-text-escaped/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/dynamic-text-escaped/_expected.html
rename to test/server-side-rendering/samples/dynamic-text-escaped/_expected.svelte
diff --git a/test/server-side-rendering/samples/dynamic-text-escaped/main.html b/test/server-side-rendering/samples/dynamic-text-escaped/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/dynamic-text-escaped/main.html
rename to test/server-side-rendering/samples/dynamic-text-escaped/main.svelte
diff --git a/test/server-side-rendering/samples/dynamic-text/_expected.html b/test/server-side-rendering/samples/dynamic-text/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/dynamic-text/_expected.html
rename to test/server-side-rendering/samples/dynamic-text/_expected.svelte
diff --git a/test/server-side-rendering/samples/dynamic-text/main.html b/test/server-side-rendering/samples/dynamic-text/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/dynamic-text/main.html
rename to test/server-side-rendering/samples/dynamic-text/main.svelte
diff --git a/test/server-side-rendering/samples/each-block/_expected.html b/test/server-side-rendering/samples/each-block/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/each-block/_expected.html
rename to test/server-side-rendering/samples/each-block/_expected.svelte
diff --git a/test/server-side-rendering/samples/each-block/main.html b/test/server-side-rendering/samples/each-block/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/each-block/main.html
rename to test/server-side-rendering/samples/each-block/main.svelte
diff --git a/test/server-side-rendering/samples/empty-elements-closed/_expected.html b/test/server-side-rendering/samples/empty-elements-closed/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/empty-elements-closed/_expected.html
rename to test/server-side-rendering/samples/empty-elements-closed/_expected.svelte
diff --git a/test/server-side-rendering/samples/empty-elements-closed/main.html b/test/server-side-rendering/samples/empty-elements-closed/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/empty-elements-closed/main.html
rename to test/server-side-rendering/samples/empty-elements-closed/main.svelte
diff --git a/test/server-side-rendering/samples/entities/_expected.html b/test/server-side-rendering/samples/entities/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/entities/_expected.html
rename to test/server-side-rendering/samples/entities/_expected.svelte
diff --git a/test/server-side-rendering/samples/entities/main.html b/test/server-side-rendering/samples/entities/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/entities/main.html
rename to test/server-side-rendering/samples/entities/main.svelte
diff --git a/test/server-side-rendering/samples/head-title/_expected-head.html b/test/server-side-rendering/samples/head-title/_expected-head.html
deleted file mode 100644
index 7d696352f9..0000000000
--- a/test/server-side-rendering/samples/head-title/_expected-head.html
+++ /dev/null
@@ -1 +0,0 @@
-<title>a custom title</title>
\ No newline at end of file
diff --git a/test/server-side-rendering/samples/head-title/_actual-head.html b/test/server-side-rendering/samples/head-title/_expected-head.svelte
similarity index 100%
rename from test/server-side-rendering/samples/head-title/_actual-head.html
rename to test/server-side-rendering/samples/head-title/_expected-head.svelte
diff --git a/test/server-side-rendering/samples/head-title/_expected.html b/test/server-side-rendering/samples/head-title/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/head-title/_expected.html
rename to test/server-side-rendering/samples/head-title/_expected.svelte
diff --git a/test/server-side-rendering/samples/head-title/main.html b/test/server-side-rendering/samples/head-title/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/head-title/main.html
rename to test/server-side-rendering/samples/head-title/main.svelte
diff --git a/test/server-side-rendering/samples/helpers/_expected.html b/test/server-side-rendering/samples/helpers/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/helpers/_expected.html
rename to test/server-side-rendering/samples/helpers/_expected.svelte
diff --git a/test/server-side-rendering/samples/helpers/main.html b/test/server-side-rendering/samples/helpers/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/helpers/main.html
rename to test/server-side-rendering/samples/helpers/main.svelte
diff --git a/test/server-side-rendering/samples/if-block-false/_expected.html b/test/server-side-rendering/samples/if-block-false/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/if-block-false/_expected.html
rename to test/server-side-rendering/samples/if-block-false/_expected.svelte
diff --git a/test/server-side-rendering/samples/if-block-false/main.html b/test/server-side-rendering/samples/if-block-false/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/if-block-false/main.html
rename to test/server-side-rendering/samples/if-block-false/main.svelte
diff --git a/test/server-side-rendering/samples/if-block-true/_expected.html b/test/server-side-rendering/samples/if-block-true/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/if-block-true/_expected.html
rename to test/server-side-rendering/samples/if-block-true/_expected.svelte
diff --git a/test/server-side-rendering/samples/if-block-true/main.html b/test/server-side-rendering/samples/if-block-true/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/if-block-true/main.html
rename to test/server-side-rendering/samples/if-block-true/main.svelte
diff --git a/test/server-side-rendering/samples/import-non-component/_expected.html b/test/server-side-rendering/samples/import-non-component/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/import-non-component/_expected.html
rename to test/server-side-rendering/samples/import-non-component/_expected.svelte
diff --git a/test/server-side-rendering/samples/import-non-component/main.html b/test/server-side-rendering/samples/import-non-component/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/import-non-component/main.html
rename to test/server-side-rendering/samples/import-non-component/main.svelte
diff --git a/test/server-side-rendering/samples/raw-mustaches/_expected.html b/test/server-side-rendering/samples/raw-mustaches/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/raw-mustaches/_expected.html
rename to test/server-side-rendering/samples/raw-mustaches/_expected.svelte
diff --git a/test/server-side-rendering/samples/raw-mustaches/main.html b/test/server-side-rendering/samples/raw-mustaches/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/raw-mustaches/main.html
rename to test/server-side-rendering/samples/raw-mustaches/main.svelte
diff --git a/test/server-side-rendering/samples/sanitize-name/[foo].html b/test/server-side-rendering/samples/sanitize-name/[foo].svelte
similarity index 100%
rename from test/server-side-rendering/samples/sanitize-name/[foo].html
rename to test/server-side-rendering/samples/sanitize-name/[foo].svelte
diff --git a/test/server-side-rendering/samples/sanitize-name/_expected.html b/test/server-side-rendering/samples/sanitize-name/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/sanitize-name/_expected.html
rename to test/server-side-rendering/samples/sanitize-name/_expected.svelte
diff --git a/test/server-side-rendering/samples/sanitize-name/main.html b/test/server-side-rendering/samples/sanitize-name/main.html
deleted file mode 100644
index 6d7986da2e..0000000000
--- a/test/server-side-rendering/samples/sanitize-name/main.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-	import Foo from './[foo].html';
-</script>
-
-<Foo/>
\ No newline at end of file
diff --git a/test/server-side-rendering/samples/sanitize-name/main.svelte b/test/server-side-rendering/samples/sanitize-name/main.svelte
new file mode 100644
index 0000000000..1438843da9
--- /dev/null
+++ b/test/server-side-rendering/samples/sanitize-name/main.svelte
@@ -0,0 +1,5 @@
+<script>
+	import Foo from './[foo].svelte';
+</script>
+
+<Foo/>
\ No newline at end of file
diff --git a/test/server-side-rendering/samples/static-div/_expected.html b/test/server-side-rendering/samples/static-div/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/static-div/_expected.html
rename to test/server-side-rendering/samples/static-div/_expected.svelte
diff --git a/test/server-side-rendering/samples/static-div/main.html b/test/server-side-rendering/samples/static-div/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/static-div/main.html
rename to test/server-side-rendering/samples/static-div/main.svelte
diff --git a/test/server-side-rendering/samples/static-text/_expected.html b/test/server-side-rendering/samples/static-text/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/static-text/_expected.html
rename to test/server-side-rendering/samples/static-text/_expected.svelte
diff --git a/test/server-side-rendering/samples/static-text/main.html b/test/server-side-rendering/samples/static-text/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/static-text/main.html
rename to test/server-side-rendering/samples/static-text/main.svelte
diff --git a/test/server-side-rendering/samples/styles-nested/One.html b/test/server-side-rendering/samples/styles-nested/One.svelte
similarity index 84%
rename from test/server-side-rendering/samples/styles-nested/One.html
rename to test/server-side-rendering/samples/styles-nested/One.svelte
index df5512b91a..94b44675c8 100644
--- a/test/server-side-rendering/samples/styles-nested/One.html
+++ b/test/server-side-rendering/samples/styles-nested/One.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Two from './Two.html';
+	import Two from './Two.svelte';
 
 	export let message;
 </script>
diff --git a/test/server-side-rendering/samples/styles-nested/Two.html b/test/server-side-rendering/samples/styles-nested/Two.svelte
similarity index 100%
rename from test/server-side-rendering/samples/styles-nested/Two.html
rename to test/server-side-rendering/samples/styles-nested/Two.svelte
diff --git a/test/server-side-rendering/samples/styles-nested/_expected.html b/test/server-side-rendering/samples/styles-nested/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/styles-nested/_expected.html
rename to test/server-side-rendering/samples/styles-nested/_expected.svelte
diff --git a/test/server-side-rendering/samples/styles-nested/main.html b/test/server-side-rendering/samples/styles-nested/main.svelte
similarity index 78%
rename from test/server-side-rendering/samples/styles-nested/main.html
rename to test/server-side-rendering/samples/styles-nested/main.svelte
index 11775475b8..d6f1d594e3 100644
--- a/test/server-side-rendering/samples/styles-nested/main.html
+++ b/test/server-side-rendering/samples/styles-nested/main.svelte
@@ -1,5 +1,5 @@
 <script>
-	import One from './One.html';
+	import One from './One.svelte';
 </script>
 
 <div>red</div>
diff --git a/test/server-side-rendering/samples/styles/_expected.html b/test/server-side-rendering/samples/styles/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/styles/_expected.html
rename to test/server-side-rendering/samples/styles/_expected.svelte
diff --git a/test/server-side-rendering/samples/styles/main.html b/test/server-side-rendering/samples/styles/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/styles/main.html
rename to test/server-side-rendering/samples/styles/main.svelte
diff --git a/test/server-side-rendering/samples/textarea-children/_expected.html b/test/server-side-rendering/samples/textarea-children/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/textarea-children/_expected.html
rename to test/server-side-rendering/samples/textarea-children/_expected.svelte
diff --git a/test/server-side-rendering/samples/textarea-children/main.html b/test/server-side-rendering/samples/textarea-children/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/textarea-children/main.html
rename to test/server-side-rendering/samples/textarea-children/main.svelte
diff --git a/test/server-side-rendering/samples/textarea-value/_expected.html b/test/server-side-rendering/samples/textarea-value/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/textarea-value/_expected.html
rename to test/server-side-rendering/samples/textarea-value/_expected.svelte
diff --git a/test/server-side-rendering/samples/textarea-value/main.html b/test/server-side-rendering/samples/textarea-value/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/textarea-value/main.html
rename to test/server-side-rendering/samples/textarea-value/main.svelte
diff --git a/test/server-side-rendering/samples/triple/_expected.html b/test/server-side-rendering/samples/triple/_expected.svelte
similarity index 100%
rename from test/server-side-rendering/samples/triple/_expected.html
rename to test/server-side-rendering/samples/triple/_expected.svelte
diff --git a/test/server-side-rendering/samples/triple/main.html b/test/server-side-rendering/samples/triple/main.svelte
similarity index 100%
rename from test/server-side-rendering/samples/triple/main.html
rename to test/server-side-rendering/samples/triple/main.svelte
diff --git a/test/sourcemaps/samples/basic/input.html b/test/sourcemaps/samples/basic/input.svelte
similarity index 100%
rename from test/sourcemaps/samples/basic/input.html
rename to test/sourcemaps/samples/basic/input.svelte
diff --git a/test/sourcemaps/samples/binding-shorthand.skip/input.html b/test/sourcemaps/samples/binding-shorthand.skip/input.svelte
similarity index 100%
rename from test/sourcemaps/samples/binding-shorthand.skip/input.html
rename to test/sourcemaps/samples/binding-shorthand.skip/input.svelte
diff --git a/test/sourcemaps/samples/binding/input.html b/test/sourcemaps/samples/binding/input.svelte
similarity index 100%
rename from test/sourcemaps/samples/binding/input.html
rename to test/sourcemaps/samples/binding/input.svelte
diff --git a/test/sourcemaps/samples/css/input.html b/test/sourcemaps/samples/css/input.svelte
similarity index 100%
rename from test/sourcemaps/samples/css/input.html
rename to test/sourcemaps/samples/css/input.svelte
diff --git a/test/sourcemaps/samples/each-block/input.html b/test/sourcemaps/samples/each-block/input.svelte
similarity index 100%
rename from test/sourcemaps/samples/each-block/input.html
rename to test/sourcemaps/samples/each-block/input.svelte
diff --git a/test/sourcemaps/samples/script/input.html b/test/sourcemaps/samples/script/input.svelte
similarity index 100%
rename from test/sourcemaps/samples/script/input.html
rename to test/sourcemaps/samples/script/input.svelte
diff --git a/test/sourcemaps/samples/static-no-script/input.html b/test/sourcemaps/samples/static-no-script/input.svelte
similarity index 100%
rename from test/sourcemaps/samples/static-no-script/input.html
rename to test/sourcemaps/samples/static-no-script/input.svelte
diff --git a/test/stats/samples/basic/input.html b/test/stats/samples/basic/input.svelte
similarity index 100%
rename from test/stats/samples/basic/input.html
rename to test/stats/samples/basic/input.svelte
diff --git a/test/stats/samples/duplicate-globals/input.html b/test/stats/samples/duplicate-globals/input.svelte
similarity index 100%
rename from test/stats/samples/duplicate-globals/input.html
rename to test/stats/samples/duplicate-globals/input.svelte
diff --git a/test/stats/samples/duplicate-non-hoistable/input.html b/test/stats/samples/duplicate-non-hoistable/input.svelte
similarity index 100%
rename from test/stats/samples/duplicate-non-hoistable/input.html
rename to test/stats/samples/duplicate-non-hoistable/input.svelte
diff --git a/test/stats/samples/duplicate-vars/input.html b/test/stats/samples/duplicate-vars/input.svelte
similarity index 100%
rename from test/stats/samples/duplicate-vars/input.html
rename to test/stats/samples/duplicate-vars/input.svelte
diff --git a/test/stats/samples/implicit-action/input.html b/test/stats/samples/implicit-action/input.svelte
similarity index 100%
rename from test/stats/samples/implicit-action/input.html
rename to test/stats/samples/implicit-action/input.svelte
diff --git a/test/stats/samples/implicit-reactive/input.html b/test/stats/samples/implicit-reactive/input.svelte
similarity index 100%
rename from test/stats/samples/implicit-reactive/input.html
rename to test/stats/samples/implicit-reactive/input.svelte
diff --git a/test/stats/samples/implicit/input.html b/test/stats/samples/implicit/input.svelte
similarity index 100%
rename from test/stats/samples/implicit/input.html
rename to test/stats/samples/implicit/input.svelte
diff --git a/test/stats/samples/imports/input.html b/test/stats/samples/imports/input.svelte
similarity index 100%
rename from test/stats/samples/imports/input.html
rename to test/stats/samples/imports/input.svelte
diff --git a/test/stats/samples/mutated-vs-reassigned-bindings/input.html b/test/stats/samples/mutated-vs-reassigned-bindings/input.svelte
similarity index 100%
rename from test/stats/samples/mutated-vs-reassigned-bindings/input.html
rename to test/stats/samples/mutated-vs-reassigned-bindings/input.svelte
diff --git a/test/stats/samples/mutated-vs-reassigned/input.html b/test/stats/samples/mutated-vs-reassigned/input.svelte
similarity index 100%
rename from test/stats/samples/mutated-vs-reassigned/input.html
rename to test/stats/samples/mutated-vs-reassigned/input.svelte
diff --git a/test/stats/samples/props/input.html b/test/stats/samples/props/input.svelte
similarity index 100%
rename from test/stats/samples/props/input.html
rename to test/stats/samples/props/input.svelte
diff --git a/test/stats/samples/store-referenced/input.html b/test/stats/samples/store-referenced/input.svelte
similarity index 100%
rename from test/stats/samples/store-referenced/input.html
rename to test/stats/samples/store-referenced/input.svelte
diff --git a/test/stats/samples/store-unreferenced/input.html b/test/stats/samples/store-unreferenced/input.svelte
similarity index 100%
rename from test/stats/samples/store-unreferenced/input.html
rename to test/stats/samples/store-unreferenced/input.svelte
diff --git a/test/stats/samples/template-references/input.html b/test/stats/samples/template-references/input.svelte
similarity index 100%
rename from test/stats/samples/template-references/input.html
rename to test/stats/samples/template-references/input.svelte
diff --git a/test/stats/samples/undeclared/input.html b/test/stats/samples/undeclared/input.svelte
similarity index 100%
rename from test/stats/samples/undeclared/input.html
rename to test/stats/samples/undeclared/input.svelte
diff --git a/test/validator/samples/a11y-alt-text/input.html b/test/validator/samples/a11y-alt-text/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-alt-text/input.html
rename to test/validator/samples/a11y-alt-text/input.svelte
diff --git a/test/validator/samples/a11y-anchor-has-content/input.html b/test/validator/samples/a11y-anchor-has-content/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-anchor-has-content/input.html
rename to test/validator/samples/a11y-anchor-has-content/input.svelte
diff --git a/test/validator/samples/a11y-anchor-in-svg-is-valid/input.html b/test/validator/samples/a11y-anchor-in-svg-is-valid/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-anchor-in-svg-is-valid/input.html
rename to test/validator/samples/a11y-anchor-in-svg-is-valid/input.svelte
diff --git a/test/validator/samples/a11y-anchor-is-valid/input.html b/test/validator/samples/a11y-anchor-is-valid/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-anchor-is-valid/input.html
rename to test/validator/samples/a11y-anchor-is-valid/input.svelte
diff --git a/test/validator/samples/a11y-aria-props/input.html b/test/validator/samples/a11y-aria-props/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-aria-props/input.html
rename to test/validator/samples/a11y-aria-props/input.svelte
diff --git a/test/validator/samples/a11y-aria-role/input.html b/test/validator/samples/a11y-aria-role/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-aria-role/input.html
rename to test/validator/samples/a11y-aria-role/input.svelte
diff --git a/test/validator/samples/a11y-aria-unsupported-element/input.html b/test/validator/samples/a11y-aria-unsupported-element/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-aria-unsupported-element/input.html
rename to test/validator/samples/a11y-aria-unsupported-element/input.svelte
diff --git a/test/validator/samples/a11y-figcaption-right-place/input.html b/test/validator/samples/a11y-figcaption-right-place/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-figcaption-right-place/input.html
rename to test/validator/samples/a11y-figcaption-right-place/input.svelte
diff --git a/test/validator/samples/a11y-figcaption-wrong-place/input.html b/test/validator/samples/a11y-figcaption-wrong-place/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-figcaption-wrong-place/input.html
rename to test/validator/samples/a11y-figcaption-wrong-place/input.svelte
diff --git a/test/validator/samples/a11y-heading-has-content/input.html b/test/validator/samples/a11y-heading-has-content/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-heading-has-content/input.html
rename to test/validator/samples/a11y-heading-has-content/input.svelte
diff --git a/test/validator/samples/a11y-html-has-lang/input.html b/test/validator/samples/a11y-html-has-lang/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-html-has-lang/input.html
rename to test/validator/samples/a11y-html-has-lang/input.svelte
diff --git a/test/validator/samples/a11y-iframe-has-title/input.html b/test/validator/samples/a11y-iframe-has-title/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-iframe-has-title/input.html
rename to test/validator/samples/a11y-iframe-has-title/input.svelte
diff --git a/test/validator/samples/a11y-no-access-key/input.html b/test/validator/samples/a11y-no-access-key/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-no-access-key/input.html
rename to test/validator/samples/a11y-no-access-key/input.svelte
diff --git a/test/validator/samples/a11y-no-autofocus/input.html b/test/validator/samples/a11y-no-autofocus/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-no-autofocus/input.html
rename to test/validator/samples/a11y-no-autofocus/input.svelte
diff --git a/test/validator/samples/a11y-no-distracting-elements/input.html b/test/validator/samples/a11y-no-distracting-elements/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-no-distracting-elements/input.html
rename to test/validator/samples/a11y-no-distracting-elements/input.svelte
diff --git a/test/validator/samples/a11y-not-on-components/input.html b/test/validator/samples/a11y-not-on-components/input.svelte
similarity index 64%
rename from test/validator/samples/a11y-not-on-components/input.html
rename to test/validator/samples/a11y-not-on-components/input.svelte
index e0ee327280..c7673a67ed 100644
--- a/test/validator/samples/a11y-not-on-components/input.html
+++ b/test/validator/samples/a11y-not-on-components/input.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 <Widget scope="foo">
diff --git a/test/validator/samples/a11y-scope/input.html b/test/validator/samples/a11y-scope/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-scope/input.html
rename to test/validator/samples/a11y-scope/input.svelte
diff --git a/test/validator/samples/a11y-tabindex-no-positive/input.html b/test/validator/samples/a11y-tabindex-no-positive/input.svelte
similarity index 100%
rename from test/validator/samples/a11y-tabindex-no-positive/input.html
rename to test/validator/samples/a11y-tabindex-no-positive/input.svelte
diff --git a/test/validator/samples/action-invalid/input.html b/test/validator/samples/action-invalid/input.svelte
similarity index 100%
rename from test/validator/samples/action-invalid/input.html
rename to test/validator/samples/action-invalid/input.svelte
diff --git a/test/validator/samples/action-on-component/input.html b/test/validator/samples/action-on-component/input.html
deleted file mode 100644
index 788bedaa94..0000000000
--- a/test/validator/samples/action-on-component/input.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-
-	function foo(){}
-</script>
-
-<Widget use:foo/>
\ No newline at end of file
diff --git a/test/validator/samples/action-on-component/input.svelte b/test/validator/samples/action-on-component/input.svelte
new file mode 100644
index 0000000000..a067c05dbd
--- /dev/null
+++ b/test/validator/samples/action-on-component/input.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Widget from './Widget.svelte';
+
+	function foo(){}
+</script>
+
+<Widget use:foo/>
\ No newline at end of file
diff --git a/test/validator/samples/animation-duplicate/input.html b/test/validator/samples/animation-duplicate/input.svelte
similarity index 100%
rename from test/validator/samples/animation-duplicate/input.html
rename to test/validator/samples/animation-duplicate/input.svelte
diff --git a/test/validator/samples/animation-missing/input.html b/test/validator/samples/animation-missing/input.svelte
similarity index 100%
rename from test/validator/samples/animation-missing/input.html
rename to test/validator/samples/animation-missing/input.svelte
diff --git a/test/validator/samples/animation-not-in-each/input.html b/test/validator/samples/animation-not-in-each/input.svelte
similarity index 100%
rename from test/validator/samples/animation-not-in-each/input.html
rename to test/validator/samples/animation-not-in-each/input.svelte
diff --git a/test/validator/samples/animation-not-in-keyed-each/input.html b/test/validator/samples/animation-not-in-keyed-each/input.svelte
similarity index 100%
rename from test/validator/samples/animation-not-in-keyed-each/input.html
rename to test/validator/samples/animation-not-in-keyed-each/input.svelte
diff --git a/test/validator/samples/animation-siblings/input.html b/test/validator/samples/animation-siblings/input.svelte
similarity index 100%
rename from test/validator/samples/animation-siblings/input.html
rename to test/validator/samples/animation-siblings/input.svelte
diff --git a/test/validator/samples/await-component-is-used/input.html b/test/validator/samples/await-component-is-used/input.svelte
similarity index 77%
rename from test/validator/samples/await-component-is-used/input.html
rename to test/validator/samples/await-component-is-used/input.svelte
index 029b549675..5fe87e0c70 100644
--- a/test/validator/samples/await-component-is-used/input.html
+++ b/test/validator/samples/await-component-is-used/input.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Component from './Component.html';
+	import Component from './Component.svelte';
 
 	export let promise;
 </script>
diff --git a/test/validator/samples/binding-dimensions-svg-child/input.html b/test/validator/samples/binding-dimensions-svg-child/input.svelte
similarity index 100%
rename from test/validator/samples/binding-dimensions-svg-child/input.html
rename to test/validator/samples/binding-dimensions-svg-child/input.svelte
diff --git a/test/validator/samples/binding-dimensions-svg/input.html b/test/validator/samples/binding-dimensions-svg/input.svelte
similarity index 100%
rename from test/validator/samples/binding-dimensions-svg/input.html
rename to test/validator/samples/binding-dimensions-svg/input.svelte
diff --git a/test/validator/samples/binding-dimensions-void/input.html b/test/validator/samples/binding-dimensions-void/input.svelte
similarity index 100%
rename from test/validator/samples/binding-dimensions-void/input.html
rename to test/validator/samples/binding-dimensions-void/input.svelte
diff --git a/test/validator/samples/binding-input-checked/input.html b/test/validator/samples/binding-input-checked/input.svelte
similarity index 100%
rename from test/validator/samples/binding-input-checked/input.html
rename to test/validator/samples/binding-input-checked/input.svelte
diff --git a/test/validator/samples/binding-input-type-boolean/input.html b/test/validator/samples/binding-input-type-boolean/input.svelte
similarity index 100%
rename from test/validator/samples/binding-input-type-boolean/input.html
rename to test/validator/samples/binding-input-type-boolean/input.svelte
diff --git a/test/validator/samples/binding-input-type-dynamic/input.html b/test/validator/samples/binding-input-type-dynamic/input.svelte
similarity index 100%
rename from test/validator/samples/binding-input-type-dynamic/input.html
rename to test/validator/samples/binding-input-type-dynamic/input.svelte
diff --git a/test/validator/samples/binding-invalid-on-element/input.html b/test/validator/samples/binding-invalid-on-element/input.svelte
similarity index 100%
rename from test/validator/samples/binding-invalid-on-element/input.html
rename to test/validator/samples/binding-invalid-on-element/input.svelte
diff --git a/test/validator/samples/binding-invalid-value/input.html b/test/validator/samples/binding-invalid-value/input.svelte
similarity index 100%
rename from test/validator/samples/binding-invalid-value/input.html
rename to test/validator/samples/binding-invalid-value/input.svelte
diff --git a/test/validator/samples/binding-invalid/input.html b/test/validator/samples/binding-invalid/input.svelte
similarity index 100%
rename from test/validator/samples/binding-invalid/input.html
rename to test/validator/samples/binding-invalid/input.svelte
diff --git a/test/validator/samples/binding-select-multiple-dynamic/input.html b/test/validator/samples/binding-select-multiple-dynamic/input.svelte
similarity index 100%
rename from test/validator/samples/binding-select-multiple-dynamic/input.html
rename to test/validator/samples/binding-select-multiple-dynamic/input.svelte
diff --git a/test/validator/samples/component-slot-default-duplicate.skip/input.html b/test/validator/samples/component-slot-default-duplicate.skip/input.svelte
similarity index 100%
rename from test/validator/samples/component-slot-default-duplicate.skip/input.html
rename to test/validator/samples/component-slot-default-duplicate.skip/input.svelte
diff --git a/test/validator/samples/component-slot-default-reserved/input.html b/test/validator/samples/component-slot-default-reserved/input.svelte
similarity index 100%
rename from test/validator/samples/component-slot-default-reserved/input.html
rename to test/validator/samples/component-slot-default-reserved/input.svelte
diff --git a/test/validator/samples/component-slot-dynamic-attribute/input.html b/test/validator/samples/component-slot-dynamic-attribute/input.svelte
similarity index 58%
rename from test/validator/samples/component-slot-dynamic-attribute/input.html
rename to test/validator/samples/component-slot-dynamic-attribute/input.svelte
index 83e1df8aa2..1eb8b4f1f0 100644
--- a/test/validator/samples/component-slot-dynamic-attribute/input.html
+++ b/test/validator/samples/component-slot-dynamic-attribute/input.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <Nested>
diff --git a/test/validator/samples/component-slot-dynamic/input.html b/test/validator/samples/component-slot-dynamic/input.svelte
similarity index 100%
rename from test/validator/samples/component-slot-dynamic/input.html
rename to test/validator/samples/component-slot-dynamic/input.svelte
diff --git a/test/validator/samples/component-slot-named-duplicate.skip/input.html b/test/validator/samples/component-slot-named-duplicate.skip/input.svelte
similarity index 100%
rename from test/validator/samples/component-slot-named-duplicate.skip/input.html
rename to test/validator/samples/component-slot-named-duplicate.skip/input.svelte
diff --git a/test/validator/samples/component-slotted-each-block/input.html b/test/validator/samples/component-slotted-each-block/input.svelte
similarity index 66%
rename from test/validator/samples/component-slotted-each-block/input.html
rename to test/validator/samples/component-slotted-each-block/input.svelte
index 2c053a1e6c..f000278a99 100644
--- a/test/validator/samples/component-slotted-each-block/input.html
+++ b/test/validator/samples/component-slotted-each-block/input.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <Nested>
diff --git a/test/validator/samples/component-slotted-if-block/input.html b/test/validator/samples/component-slotted-if-block/input.svelte
similarity index 62%
rename from test/validator/samples/component-slotted-if-block/input.html
rename to test/validator/samples/component-slotted-if-block/input.svelte
index eda6bc2e13..d9159dfd60 100644
--- a/test/validator/samples/component-slotted-if-block/input.html
+++ b/test/validator/samples/component-slotted-if-block/input.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <Nested>
diff --git a/test/validator/samples/css-invalid-global-placement/input.html b/test/validator/samples/css-invalid-global-placement/input.svelte
similarity index 100%
rename from test/validator/samples/css-invalid-global-placement/input.html
rename to test/validator/samples/css-invalid-global-placement/input.svelte
diff --git a/test/validator/samples/css-invalid-global/input.html b/test/validator/samples/css-invalid-global/input.svelte
similarity index 100%
rename from test/validator/samples/css-invalid-global/input.html
rename to test/validator/samples/css-invalid-global/input.svelte
diff --git a/test/validator/samples/debug-invalid-args/input.html b/test/validator/samples/debug-invalid-args/input.svelte
similarity index 100%
rename from test/validator/samples/debug-invalid-args/input.html
rename to test/validator/samples/debug-invalid-args/input.svelte
diff --git a/test/validator/samples/default-export/input.html b/test/validator/samples/default-export/input.svelte
similarity index 100%
rename from test/validator/samples/default-export/input.html
rename to test/validator/samples/default-export/input.svelte
diff --git a/test/validator/samples/directive-non-expression/input.html b/test/validator/samples/directive-non-expression/input.svelte
similarity index 100%
rename from test/validator/samples/directive-non-expression/input.html
rename to test/validator/samples/directive-non-expression/input.svelte
diff --git a/test/validator/samples/each-block-invalid-context-destructured/input.html b/test/validator/samples/each-block-invalid-context-destructured/input.svelte
similarity index 100%
rename from test/validator/samples/each-block-invalid-context-destructured/input.html
rename to test/validator/samples/each-block-invalid-context-destructured/input.svelte
diff --git a/test/validator/samples/each-block-invalid-context/input.html b/test/validator/samples/each-block-invalid-context/input.svelte
similarity index 100%
rename from test/validator/samples/each-block-invalid-context/input.html
rename to test/validator/samples/each-block-invalid-context/input.svelte
diff --git a/test/validator/samples/each-block-multiple-children/input.html b/test/validator/samples/each-block-multiple-children/input.svelte
similarity index 100%
rename from test/validator/samples/each-block-multiple-children/input.html
rename to test/validator/samples/each-block-multiple-children/input.svelte
diff --git a/test/validator/samples/empty-block-dev/input.html b/test/validator/samples/empty-block-dev/input.svelte
similarity index 100%
rename from test/validator/samples/empty-block-dev/input.html
rename to test/validator/samples/empty-block-dev/input.svelte
diff --git a/test/validator/samples/empty-block-prod/input.html b/test/validator/samples/empty-block-prod/input.svelte
similarity index 100%
rename from test/validator/samples/empty-block-prod/input.html
rename to test/validator/samples/empty-block-prod/input.svelte
diff --git a/test/validator/samples/event-modifiers-invalid-passive/input.html b/test/validator/samples/event-modifiers-invalid-passive/input.svelte
similarity index 100%
rename from test/validator/samples/event-modifiers-invalid-passive/input.html
rename to test/validator/samples/event-modifiers-invalid-passive/input.svelte
diff --git a/test/validator/samples/event-modifiers-invalid/input.html b/test/validator/samples/event-modifiers-invalid/input.svelte
similarity index 100%
rename from test/validator/samples/event-modifiers-invalid/input.html
rename to test/validator/samples/event-modifiers-invalid/input.svelte
diff --git a/test/validator/samples/event-modifiers-legacy/input.html b/test/validator/samples/event-modifiers-legacy/input.svelte
similarity index 100%
rename from test/validator/samples/event-modifiers-legacy/input.html
rename to test/validator/samples/event-modifiers-legacy/input.svelte
diff --git a/test/validator/samples/event-modifiers-redundant/input.html b/test/validator/samples/event-modifiers-redundant/input.svelte
similarity index 100%
rename from test/validator/samples/event-modifiers-redundant/input.html
rename to test/validator/samples/event-modifiers-redundant/input.svelte
diff --git a/test/validator/samples/missing-component/input.html b/test/validator/samples/missing-component/input.svelte
similarity index 100%
rename from test/validator/samples/missing-component/input.html
rename to test/validator/samples/missing-component/input.svelte
diff --git a/test/validator/samples/multiple-script-default-context/input.html b/test/validator/samples/multiple-script-default-context/input.svelte
similarity index 100%
rename from test/validator/samples/multiple-script-default-context/input.html
rename to test/validator/samples/multiple-script-default-context/input.svelte
diff --git a/test/validator/samples/multiple-script-module-context/input.html b/test/validator/samples/multiple-script-module-context/input.svelte
similarity index 100%
rename from test/validator/samples/multiple-script-module-context/input.html
rename to test/validator/samples/multiple-script-module-context/input.svelte
diff --git a/test/validator/samples/namespace-invalid-unguessable/input.html b/test/validator/samples/namespace-invalid-unguessable/input.svelte
similarity index 100%
rename from test/validator/samples/namespace-invalid-unguessable/input.html
rename to test/validator/samples/namespace-invalid-unguessable/input.svelte
diff --git a/test/validator/samples/namespace-invalid/input.html b/test/validator/samples/namespace-invalid/input.svelte
similarity index 100%
rename from test/validator/samples/namespace-invalid/input.html
rename to test/validator/samples/namespace-invalid/input.svelte
diff --git a/test/validator/samples/namespace-non-literal/input.html b/test/validator/samples/namespace-non-literal/input.svelte
similarity index 100%
rename from test/validator/samples/namespace-non-literal/input.html
rename to test/validator/samples/namespace-non-literal/input.svelte
diff --git a/test/validator/samples/non-empty-block-dev/input.html b/test/validator/samples/non-empty-block-dev/input.svelte
similarity index 100%
rename from test/validator/samples/non-empty-block-dev/input.html
rename to test/validator/samples/non-empty-block-dev/input.svelte
diff --git a/test/validator/samples/prop-slot/input.html b/test/validator/samples/prop-slot/input.svelte
similarity index 51%
rename from test/validator/samples/prop-slot/input.html
rename to test/validator/samples/prop-slot/input.svelte
index 6ce1b6dcce..816c656aa0 100644
--- a/test/validator/samples/prop-slot/input.html
+++ b/test/validator/samples/prop-slot/input.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Widget from './Widget.html';
+	import Widget from './Widget.svelte';
 </script>
 
 <Widget slot='foo'/>
diff --git a/test/validator/samples/reactive-declaration-cyclical/input.html b/test/validator/samples/reactive-declaration-cyclical/input.svelte
similarity index 100%
rename from test/validator/samples/reactive-declaration-cyclical/input.html
rename to test/validator/samples/reactive-declaration-cyclical/input.svelte
diff --git a/test/validator/samples/ref-not-supported-in-css/input.html b/test/validator/samples/ref-not-supported-in-css/input.svelte
similarity index 100%
rename from test/validator/samples/ref-not-supported-in-css/input.html
rename to test/validator/samples/ref-not-supported-in-css/input.svelte
diff --git a/test/validator/samples/ref-not-supported/input.html b/test/validator/samples/ref-not-supported/input.svelte
similarity index 100%
rename from test/validator/samples/ref-not-supported/input.html
rename to test/validator/samples/ref-not-supported/input.svelte
diff --git a/test/validator/samples/script-invalid-context/input.html b/test/validator/samples/script-invalid-context/input.svelte
similarity index 100%
rename from test/validator/samples/script-invalid-context/input.html
rename to test/validator/samples/script-invalid-context/input.svelte
diff --git a/test/validator/samples/select-multiple/input.html b/test/validator/samples/select-multiple/input.svelte
similarity index 100%
rename from test/validator/samples/select-multiple/input.html
rename to test/validator/samples/select-multiple/input.svelte
diff --git a/test/validator/samples/slot-attribute-invalid/input.html b/test/validator/samples/slot-attribute-invalid/input.svelte
similarity index 100%
rename from test/validator/samples/slot-attribute-invalid/input.html
rename to test/validator/samples/slot-attribute-invalid/input.svelte
diff --git a/test/validator/samples/svg-child-component-declared-namespace/input.html b/test/validator/samples/svg-child-component-declared-namespace/input.svelte
similarity index 100%
rename from test/validator/samples/svg-child-component-declared-namespace/input.html
rename to test/validator/samples/svg-child-component-declared-namespace/input.svelte
diff --git a/test/validator/samples/svg-child-component-undeclared-namespace/input.html b/test/validator/samples/svg-child-component-undeclared-namespace/input.svelte
similarity index 100%
rename from test/validator/samples/svg-child-component-undeclared-namespace/input.html
rename to test/validator/samples/svg-child-component-undeclared-namespace/input.svelte
diff --git a/test/validator/samples/tag-invalid/input.html b/test/validator/samples/tag-invalid/input.svelte
similarity index 100%
rename from test/validator/samples/tag-invalid/input.html
rename to test/validator/samples/tag-invalid/input.svelte
diff --git a/test/validator/samples/tag-non-string/input.html b/test/validator/samples/tag-non-string/input.svelte
similarity index 100%
rename from test/validator/samples/tag-non-string/input.html
rename to test/validator/samples/tag-non-string/input.svelte
diff --git a/test/validator/samples/textarea-value-children/input.html b/test/validator/samples/textarea-value-children/input.svelte
similarity index 100%
rename from test/validator/samples/textarea-value-children/input.html
rename to test/validator/samples/textarea-value-children/input.svelte
diff --git a/test/validator/samples/title-no-attributes/input.html b/test/validator/samples/title-no-attributes/input.svelte
similarity index 100%
rename from test/validator/samples/title-no-attributes/input.html
rename to test/validator/samples/title-no-attributes/input.svelte
diff --git a/test/validator/samples/title-no-children/input.html b/test/validator/samples/title-no-children/input.svelte
similarity index 100%
rename from test/validator/samples/title-no-children/input.html
rename to test/validator/samples/title-no-children/input.svelte
diff --git a/test/validator/samples/transition-duplicate-in-transition/input.html b/test/validator/samples/transition-duplicate-in-transition/input.svelte
similarity index 100%
rename from test/validator/samples/transition-duplicate-in-transition/input.html
rename to test/validator/samples/transition-duplicate-in-transition/input.svelte
diff --git a/test/validator/samples/transition-duplicate-in/input.html b/test/validator/samples/transition-duplicate-in/input.svelte
similarity index 100%
rename from test/validator/samples/transition-duplicate-in/input.html
rename to test/validator/samples/transition-duplicate-in/input.svelte
diff --git a/test/validator/samples/transition-duplicate-out-transition/input.html b/test/validator/samples/transition-duplicate-out-transition/input.svelte
similarity index 100%
rename from test/validator/samples/transition-duplicate-out-transition/input.html
rename to test/validator/samples/transition-duplicate-out-transition/input.svelte
diff --git a/test/validator/samples/transition-duplicate-out/input.html b/test/validator/samples/transition-duplicate-out/input.svelte
similarity index 100%
rename from test/validator/samples/transition-duplicate-out/input.html
rename to test/validator/samples/transition-duplicate-out/input.svelte
diff --git a/test/validator/samples/transition-duplicate-transition-in/input.html b/test/validator/samples/transition-duplicate-transition-in/input.svelte
similarity index 100%
rename from test/validator/samples/transition-duplicate-transition-in/input.html
rename to test/validator/samples/transition-duplicate-transition-in/input.svelte
diff --git a/test/validator/samples/transition-duplicate-transition-out/input.html b/test/validator/samples/transition-duplicate-transition-out/input.svelte
similarity index 100%
rename from test/validator/samples/transition-duplicate-transition-out/input.html
rename to test/validator/samples/transition-duplicate-transition-out/input.svelte
diff --git a/test/validator/samples/transition-duplicate-transition/input.html b/test/validator/samples/transition-duplicate-transition/input.svelte
similarity index 100%
rename from test/validator/samples/transition-duplicate-transition/input.html
rename to test/validator/samples/transition-duplicate-transition/input.svelte
diff --git a/test/validator/samples/transition-missing/input.html b/test/validator/samples/transition-missing/input.svelte
similarity index 100%
rename from test/validator/samples/transition-missing/input.html
rename to test/validator/samples/transition-missing/input.svelte
diff --git a/test/validator/samples/transition-on-component/input.html b/test/validator/samples/transition-on-component/input.html
deleted file mode 100644
index 392f346424..0000000000
--- a/test/validator/samples/transition-on-component/input.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<script>
-	import Widget from './Widget.html';
-
-	function foo() {}
-</script>
-
-<Widget in:foo/>
\ No newline at end of file
diff --git a/test/validator/samples/transition-on-component/input.svelte b/test/validator/samples/transition-on-component/input.svelte
new file mode 100644
index 0000000000..12c3cd9bf8
--- /dev/null
+++ b/test/validator/samples/transition-on-component/input.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Widget from './Widget.svelte';
+
+	function foo() {}
+</script>
+
+<Widget in:foo/>
\ No newline at end of file
diff --git a/test/validator/samples/undefined-value/input.html b/test/validator/samples/undefined-value/input.svelte
similarity index 100%
rename from test/validator/samples/undefined-value/input.html
rename to test/validator/samples/undefined-value/input.svelte
diff --git a/test/validator/samples/window-binding-invalid-innerwidth/input.html b/test/validator/samples/window-binding-invalid-innerwidth/input.svelte
similarity index 100%
rename from test/validator/samples/window-binding-invalid-innerwidth/input.html
rename to test/validator/samples/window-binding-invalid-innerwidth/input.svelte
diff --git a/test/validator/samples/window-binding-invalid-value/input.html b/test/validator/samples/window-binding-invalid-value/input.svelte
similarity index 100%
rename from test/validator/samples/window-binding-invalid-value/input.html
rename to test/validator/samples/window-binding-invalid-value/input.svelte
diff --git a/test/validator/samples/window-binding-invalid-width/input.html b/test/validator/samples/window-binding-invalid-width/input.svelte
similarity index 100%
rename from test/validator/samples/window-binding-invalid-width/input.html
rename to test/validator/samples/window-binding-invalid-width/input.svelte
diff --git a/test/validator/samples/window-binding-invalid/input.html b/test/validator/samples/window-binding-invalid/input.svelte
similarity index 100%
rename from test/validator/samples/window-binding-invalid/input.html
rename to test/validator/samples/window-binding-invalid/input.svelte
diff --git a/test/validator/samples/window-binding-online/input.html b/test/validator/samples/window-binding-online/input.svelte
similarity index 100%
rename from test/validator/samples/window-binding-online/input.html
rename to test/validator/samples/window-binding-online/input.svelte

From 206a3d0131f8c01c762c68d75f4af413942289b1 Mon Sep 17 00:00:00 2001
From: Rich Harris <richard.a.harris@gmail.com>
Date: Fri, 8 Feb 2019 09:32:36 -0500
Subject: [PATCH 2/3] update tests

---
 register.js                                        |  3 ++-
 test/cli/samples/basic/command.sh                  |  2 +-
 test/cli/samples/basic/expected/Main.js            |  2 +-
 test/cli/samples/custom-element/command.sh         |  2 +-
 test/cli/samples/custom-element/expected/Main.js   |  2 +-
 test/cli/samples/dev/command.sh                    |  2 +-
 test/cli/samples/dev/expected/Main.js              |  4 ++--
 test/cli/samples/dir-sourcemap/expected/Main.js    |  4 ++--
 .../cli/samples/dir-sourcemap/expected/Main.js.map |  2 +-
 test/cli/samples/dir-sourcemap/expected/Widget.js  |  2 +-
 .../samples/dir-sourcemap/expected/Widget.js.map   |  2 +-
 test/cli/samples/dir-subdir/expected/Main.js       |  4 ++--
 .../samples/dir-subdir/expected/widget/Widget.js   |  2 +-
 test/cli/samples/dir/expected/Main.js              |  4 ++--
 test/cli/samples/dir/expected/Widget.js            |  2 +-
 test/cli/samples/globals/command.sh                |  2 +-
 test/cli/samples/globals/expected/Main.js          |  2 +-
 test/cli/samples/sourcemap-inline/command.sh       |  2 +-
 test/cli/samples/sourcemap-inline/expected/Main.js |  2 +-
 test/cli/samples/sourcemap/command.sh              |  2 +-
 test/cli/samples/sourcemap/expected/Main.js        |  2 +-
 test/cli/samples/sourcemap/expected/Main.js.map    |  2 +-
 test/cli/samples/ssr/command.sh                    |  2 +-
 test/cli/samples/ssr/expected/Main.js              |  2 +-
 test/cli/samples/store/command.sh                  |  2 +-
 test/cli/samples/store/expected/Main.js            |  2 +-
 test/css/index.js                                  |  2 +-
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 test/css/samples/empty-class/_config.js            |  2 +-
 .../nested/{expected.svelte => expected.html}      |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../{expected.svelte => expected.html}             |  0
 .../css/samples/unused-selector-leading/_config.js |  4 ++--
 .../{expected.svelte => expected.html}             |  0
 .../css/samples/unused-selector-ternary/_config.js |  2 +-
 .../{expected.svelte => expected.html}             |  0
 test/css/samples/unused-selector/_config.js        |  2 +-
 .../{expected.svelte => expected.html}             |  0
 test/custom-elements/index.js                      |  2 +-
 test/custom-elements/samples/custom-method/test.js |  2 +-
 test/custom-elements/samples/escaped-css/test.js   |  2 +-
 test/custom-elements/samples/html-slots/test.js    |  2 +-
 test/custom-elements/samples/html/test.js          |  2 +-
 test/custom-elements/samples/nested.skip/test.js   |  2 +-
 test/custom-elements/samples/new-styled/test.js    |  2 +-
 test/custom-elements/samples/new/test.js           |  2 +-
 .../samples/no-missing-prop-warnings/test.js       |  2 +-
 test/custom-elements/samples/oncreate/test.js      |  2 +-
 test/custom-elements/samples/props/test.js         |  2 +-
 test/helpers.js                                    |  2 +-
 test/hydration/index.js                            |  4 ++--
 .../samples/basic/{_after.svelte => _after.html}   |  0
 .../samples/basic/{_before.svelte => _before.html} |  0
 .../binding-input/{_after.svelte => _after.html}   |  0
 .../binding-input/{_before.svelte => _before.html} |  0
 .../{_after.svelte => _after.html}                 |  0
 .../{_before.svelte => _before.html}               |  0
 .../component/{_after.svelte => _after.html}       |  0
 .../component/{_before.svelte => _before.html}     |  0
 .../{_after.svelte => _after.html}                 |  0
 .../{_before.svelte => _before.html}               |  0
 .../dynamic-text/{_after.svelte => _after.html}    |  0
 .../dynamic-text/{_before.svelte => _before.html}  |  0
 .../{_after.svelte => _after.html}                 |  0
 .../{_before.svelte => _before.html}               |  0
 .../each-block/{_after.svelte => _after.html}      |  0
 .../each-block/{_before.svelte => _before.html}    |  0
 .../{_after.svelte => _after.html}                 |  0
 .../{_before.svelte => _before.html}               |  0
 .../{_after.svelte => _after.html}                 |  0
 .../{_before.svelte => _before.html}               |  0
 .../{_after.svelte => _after.html}                 |  0
 .../{_before.svelte => _before.html}               |  0
 .../{_after.svelte => _after.html}                 |  0
 .../{_before.svelte => _before.html}               |  0
 .../element-nested/{_after.svelte => _after.html}  |  0
 .../{_before.svelte => _before.html}               |  0
 .../element-ref/{_after.svelte => _after.html}     |  0
 .../element-ref/{_before.svelte => _before.html}   |  0
 .../event-handler/{_after.svelte => _after.html}   |  0
 .../event-handler/{_before.svelte => _before.html} |  0
 .../if-block-anchor/{_after.svelte => _after.html} |  0
 .../{_before.svelte => _before.html}               |  0
 .../if-block-false/{_after.svelte => _after.html}  |  0
 .../{_before.svelte => _before.html}               |  0
 .../if-block-update/{_after.svelte => _after.html} |  0
 .../{_before.svelte => _before.html}               |  0
 .../if-block/{_after.svelte => _after.html}        |  0
 .../if-block/{_before.svelte => _before.html}      |  0
 .../samples/raw/{_after.svelte => _after.html}     |  0
 .../samples/raw/{_before.svelte => _before.html}   |  0
 .../top-level-text/{_after.svelte => _after.html}  |  0
 .../{_before.svelte => _before.html}               |  0
 test/js/index.js                                   |  2 +-
 test/js/samples/dynamic-import/expected.js         |  4 ++--
 test/js/samples/non-imported-component/expected.js |  2 +-
 test/parser/index.js                               |  2 +-
 test/preprocess/index.js                           |  4 ++--
 test/preprocess/samples/filename/_config.js        |  2 +-
 test/preprocess/samples/filename/output.svelte     |  4 ++--
 test/runtime/index.js                              |  6 +++---
 .../ComponentSelector.svelte                       |  2 +-
 .../samples/component-binding-deep-b/_config.js    | 12 ++++++------
 .../samples/element-source-location/_config.js     |  6 +++---
 test/server-side-rendering/index.js                | 14 +++-----------
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../bindings/{_expected.svelte => _expected.html}  |  0
 .../comment/{_expected.svelte => _expected.html}   |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../component/{_expected.svelte => _expected.html} |  0
 .../computed/{_expected.svelte => _expected.html}  |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../entities/{_expected.svelte => _expected.html}  |  0
 .../{_expected-head.svelte => _expected-head.html} |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../helpers/{_expected.svelte => _expected.html}   |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../styles/{_expected.svelte => _expected.html}    |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../{_expected.svelte => _expected.html}           |  0
 .../triple/{_expected.svelte => _expected.html}    |  0
 test/sourcemaps/index.js                           |  6 +++---
 test/sourcemaps/samples/basic/test.js              |  4 ++--
 .../samples/binding-shorthand.skip/test.js         |  2 +-
 test/sourcemaps/samples/binding/test.js            |  4 ++--
 test/sourcemaps/samples/css/test.js                |  2 +-
 test/sourcemaps/samples/each-block/test.js         |  2 +-
 test/sourcemaps/samples/script/test.js             |  2 +-
 test/sourcemaps/samples/static-no-script/test.js   |  4 ++--
 test/stats/index.js                                |  2 +-
 test/validator/index.js                            |  2 +-
 .../samples/a11y-not-on-components/warnings.json   |  6 +++---
 .../samples/action-on-component/errors.json        |  6 +++---
 .../component-slot-dynamic-attribute/errors.json   |  6 +++---
 .../component-slotted-each-block/errors.json       |  6 +++---
 .../samples/component-slotted-if-block/errors.json |  6 +++---
 test/validator/samples/prop-slot/errors.json       |  6 +++---
 .../samples/transition-on-component/errors.json    |  6 +++---
 183 files changed, 113 insertions(+), 120 deletions(-)
 rename test/css/samples/combinator-child/{expected.svelte => expected.html} (100%)
 rename test/css/samples/descendant-selector-non-top-level-outer/{expected.svelte => expected.html} (100%)
 rename test/css/samples/nested/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-attribute-selector-contains/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-attribute-selector-equals-case-insensitive/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-attribute-selector-equals-dynamic/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-attribute-selector-equals/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-attribute-selector-pipe-equals/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-attribute-selector-prefix/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-attribute-selector-suffix/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-attribute-selector-word-equals/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-attribute-selector/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-class-dynamic/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-class-static/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-descendant-global-inner-class/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-descendant-global-inner-multiple/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-descendant-global-inner/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-descendant-global-outer-multiple/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-descendant-global-outer/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-descendant/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-global/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-id/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-whitespace-multiple/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute-whitespace/{expected.svelte => expected.html} (100%)
 rename test/css/samples/omit-scoping-attribute/{expected.svelte => expected.html} (100%)
 rename test/css/samples/unused-selector-leading/{expected.svelte => expected.html} (100%)
 rename test/css/samples/unused-selector-ternary/{expected.svelte => expected.html} (100%)
 rename test/css/samples/unused-selector/{expected.svelte => expected.html} (100%)
 rename test/hydration/samples/basic/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/basic/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/binding-input/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/binding-input/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/component-in-element/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/component-in-element/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/component/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/component/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/dynamic-text-changed/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/dynamic-text-changed/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/dynamic-text/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/dynamic-text/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/each-block-arg-clash/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/each-block-arg-clash/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/each-block/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/each-block/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/element-attribute-added/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/element-attribute-added/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/element-attribute-changed/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/element-attribute-changed/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/element-attribute-removed/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/element-attribute-removed/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/element-attribute-unchanged/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/element-attribute-unchanged/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/element-nested/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/element-nested/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/element-ref/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/element-ref/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/event-handler/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/event-handler/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/if-block-anchor/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/if-block-anchor/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/if-block-false/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/if-block-false/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/if-block-update/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/if-block-update/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/if-block/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/if-block/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/raw/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/raw/{_before.svelte => _before.html} (100%)
 rename test/hydration/samples/top-level-text/{_after.svelte => _after.html} (100%)
 rename test/hydration/samples/top-level-text/{_before.svelte => _before.html} (100%)
 rename test/server-side-rendering/samples/attribute-boolean/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/attribute-dynamic/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/attribute-escaped-quotes-spread/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/attribute-escaped-quotes/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/attribute-static/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/bindings/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/comment/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/component-binding-renamed/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/component-binding/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/component-data-dynamic/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/component-data-empty/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/component-refs-and-attributes/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/component-refs/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/component-with-different-extension/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/component-yield/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/component/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/computed/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/default-data-override/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/default-data/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/directives/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/dynamic-text-escaped/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/dynamic-text/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/each-block/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/empty-elements-closed/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/entities/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/head-title/{_expected-head.svelte => _expected-head.html} (100%)
 rename test/server-side-rendering/samples/head-title/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/helpers/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/if-block-false/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/if-block-true/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/import-non-component/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/raw-mustaches/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/sanitize-name/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/static-div/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/static-text/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/styles-nested/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/styles/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/textarea-children/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/textarea-value/{_expected.svelte => _expected.html} (100%)
 rename test/server-side-rendering/samples/triple/{_expected.svelte => _expected.html} (100%)

diff --git a/register.js b/register.js
index cbd4a387ac..4dee2a4b6a 100644
--- a/register.js
+++ b/register.js
@@ -3,7 +3,7 @@ const path = require('path');
 const { compile } = require('./compiler.js');
 
 let compileOptions = {
-	extensions: ['.html']
+	extensions: ['.svelte', '.html']
 };
 
 function capitalise(name) {
@@ -43,6 +43,7 @@ function registerExtension(extension) {
 	};
 }
 
+registerExtension('.svelte');
 registerExtension('.html');
 
 module.exports = register;
\ No newline at end of file
diff --git a/test/cli/samples/basic/command.sh b/test/cli/samples/basic/command.sh
index 0ae80e4c95..9e272a7d5b 100644
--- a/test/cli/samples/basic/command.sh
+++ b/test/cli/samples/basic/command.sh
@@ -1 +1 @@
-svelte compile src/Main.html > actual/Main.js
+svelte compile src/Main.svelte > actual/Main.js
diff --git a/test/cli/samples/basic/expected/Main.js b/test/cli/samples/basic/expected/Main.js
index ba35a0c1e9..ecc2beb83c 100644
--- a/test/cli/samples/basic/expected/Main.js
+++ b/test/cli/samples/basic/expected/Main.js
@@ -1,4 +1,4 @@
-/* src/Main.html generated by Svelte vx.y.z */
+/* src/Main.svelte generated by Svelte vx.y.z */
 
 function create_main_fragment(component, ctx) {
 	var p;
diff --git a/test/cli/samples/custom-element/command.sh b/test/cli/samples/custom-element/command.sh
index b93c2cb16a..ee9f854e9b 100644
--- a/test/cli/samples/custom-element/command.sh
+++ b/test/cli/samples/custom-element/command.sh
@@ -1 +1 @@
-svelte compile src/Main.html --customElement > actual/Main.js
+svelte compile src/Main.svelte --customElement > actual/Main.js
diff --git a/test/cli/samples/custom-element/expected/Main.js b/test/cli/samples/custom-element/expected/Main.js
index 40865a2c81..f6befc4e3b 100644
--- a/test/cli/samples/custom-element/expected/Main.js
+++ b/test/cli/samples/custom-element/expected/Main.js
@@ -1,4 +1,4 @@
-/* src/Main.html generated by Svelte vx.y.z */
+/* src/Main.svelte generated by Svelte vx.y.z */
 
 function create_main_fragment(component, ctx) {
 	var p;
diff --git a/test/cli/samples/dev/command.sh b/test/cli/samples/dev/command.sh
index 37d9b87fc0..b9dc99e7d1 100644
--- a/test/cli/samples/dev/command.sh
+++ b/test/cli/samples/dev/command.sh
@@ -1 +1 @@
-svelte compile src/Main.html -d > actual/Main.js
\ No newline at end of file
+svelte compile src/Main.svelte -d > actual/Main.js
\ No newline at end of file
diff --git a/test/cli/samples/dev/expected/Main.js b/test/cli/samples/dev/expected/Main.js
index be11885fa0..db75c4a5c1 100644
--- a/test/cli/samples/dev/expected/Main.js
+++ b/test/cli/samples/dev/expected/Main.js
@@ -1,6 +1,6 @@
-/* src/Main.html generated by Svelte v2.13.4 */
+/* src/Main.svelte generated by Svelte v2.13.4 */
 
-const file = "src/Main.html";
+const file = "src/Main.svelte";
 
 function create_main_fragment(component, ctx) {
 	var p;
diff --git a/test/cli/samples/dir-sourcemap/expected/Main.js b/test/cli/samples/dir-sourcemap/expected/Main.js
index 0c0fab6094..e164569e1c 100644
--- a/test/cli/samples/dir-sourcemap/expected/Main.js
+++ b/test/cli/samples/dir-sourcemap/expected/Main.js
@@ -1,5 +1,5 @@
-/* src/Main.html generated by Svelte vx.y.z */
-import Widget from './Widget.html';
+/* src/Main.svelte generated by Svelte vx.y.z */
+import Widget from './Widget.svelte';
 
 
 
diff --git a/test/cli/samples/dir-sourcemap/expected/Main.js.map b/test/cli/samples/dir-sourcemap/expected/Main.js.map
index 621cf85109..a0f4cf48c7 100644
--- a/test/cli/samples/dir-sourcemap/expected/Main.js.map
+++ b/test/cli/samples/dir-sourcemap/expected/Main.js.map
@@ -1 +1 @@
-{"version":3,"file":"Main.js","sources":["../src/Main.html"],"sourcesContent":["<Widget/>\n\n<script>\n\timport Widget from './Widget.html';\n\n\texport default {\n\t\tcomponents: {\n\t\t\tWidget\n\t\t}\n\t};\n</script>"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"}
\ No newline at end of file
+{"version":3,"file":"Main.js","sources":["../src/Main.svelte"],"sourcesContent":["<Widget/>\n\n<script>\n\timport Widget from './Widget.svelte';\n\n\texport default {\n\t\tcomponents: {\n\t\t\tWidget\n\t\t}\n\t};\n</script>"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"}
\ No newline at end of file
diff --git a/test/cli/samples/dir-sourcemap/expected/Widget.js b/test/cli/samples/dir-sourcemap/expected/Widget.js
index b6019a73fd..d55dcbda4c 100644
--- a/test/cli/samples/dir-sourcemap/expected/Widget.js
+++ b/test/cli/samples/dir-sourcemap/expected/Widget.js
@@ -1,4 +1,4 @@
-/* src/Widget.html generated by Svelte vx.y.z */
+/* src/Widget.svelte generated by Svelte vx.y.z */
 
 function create_main_fragment(component, ctx) {
 	var p;
diff --git a/test/cli/samples/dir-sourcemap/expected/Widget.js.map b/test/cli/samples/dir-sourcemap/expected/Widget.js.map
index 57807d3fc0..37247333ed 100644
--- a/test/cli/samples/dir-sourcemap/expected/Widget.js.map
+++ b/test/cli/samples/dir-sourcemap/expected/Widget.js.map
@@ -1 +1 @@
-{"version":3,"file":"Widget.js","sources":["../src/Widget.html"],"sourcesContent":["<p>widget</p>"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"}
\ No newline at end of file
+{"version":3,"file":"Widget.js","sources":["../src/Widget.svelte"],"sourcesContent":["<p>widget</p>"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"}
\ No newline at end of file
diff --git a/test/cli/samples/dir-subdir/expected/Main.js b/test/cli/samples/dir-subdir/expected/Main.js
index 2778c8c868..3026a122e2 100644
--- a/test/cli/samples/dir-subdir/expected/Main.js
+++ b/test/cli/samples/dir-subdir/expected/Main.js
@@ -1,5 +1,5 @@
-/* src/Main.html generated by Svelte vx.y.z */
-import Widget from './widget/Widget.html';
+/* src/Main.svelte generated by Svelte vx.y.z */
+import Widget from './widget/Widget.svelte';
 
 
 
diff --git a/test/cli/samples/dir-subdir/expected/widget/Widget.js b/test/cli/samples/dir-subdir/expected/widget/Widget.js
index 9282b7ddb4..e63ac2dad7 100644
--- a/test/cli/samples/dir-subdir/expected/widget/Widget.js
+++ b/test/cli/samples/dir-subdir/expected/widget/Widget.js
@@ -1,4 +1,4 @@
-/* src/widget/Widget.html generated by Svelte vx.y.z */
+/* src/widget/Widget.svelte generated by Svelte vx.y.z */
 
 function create_main_fragment(component, ctx) {
 	var p;
diff --git a/test/cli/samples/dir/expected/Main.js b/test/cli/samples/dir/expected/Main.js
index bbc005da76..d87ac37939 100644
--- a/test/cli/samples/dir/expected/Main.js
+++ b/test/cli/samples/dir/expected/Main.js
@@ -1,5 +1,5 @@
-/* src/Main.html generated by Svelte vx.y.z */
-import Widget from './Widget.html';
+/* src/Main.svelte generated by Svelte vx.y.z */
+import Widget from './Widget.svelte';
 
 
 
diff --git a/test/cli/samples/dir/expected/Widget.js b/test/cli/samples/dir/expected/Widget.js
index c5981a4c53..eeb37e3cfa 100644
--- a/test/cli/samples/dir/expected/Widget.js
+++ b/test/cli/samples/dir/expected/Widget.js
@@ -1,4 +1,4 @@
-/* src/Widget.html generated by Svelte vx.y.z */
+/* src/Widget.svelte generated by Svelte vx.y.z */
 
 function create_main_fragment(component, ctx) {
 	var p;
diff --git a/test/cli/samples/globals/command.sh b/test/cli/samples/globals/command.sh
index 9ed0c2a844..9e1a2de74a 100644
--- a/test/cli/samples/globals/command.sh
+++ b/test/cli/samples/globals/command.sh
@@ -1 +1 @@
-svelte compile src/Main.html -f iife -g the-answer:theAnswer > actual/Main.js
\ No newline at end of file
+svelte compile src/Main.svelte -f iife -g the-answer:theAnswer > actual/Main.js
\ No newline at end of file
diff --git a/test/cli/samples/globals/expected/Main.js b/test/cli/samples/globals/expected/Main.js
index 1c6e01cdb8..8e526b08bf 100644
--- a/test/cli/samples/globals/expected/Main.js
+++ b/test/cli/samples/globals/expected/Main.js
@@ -1,4 +1,4 @@
-/* src/Main.html generated by Svelte vx.y.z */
+/* src/Main.svelte generated by Svelte vx.y.z */
 var Main = (function(answer) { "use strict";
 	answer = (answer && answer.__esModule) ? answer["default"] : answer;
 
diff --git a/test/cli/samples/sourcemap-inline/command.sh b/test/cli/samples/sourcemap-inline/command.sh
index 36b5b71b8d..073fa7d259 100644
--- a/test/cli/samples/sourcemap-inline/command.sh
+++ b/test/cli/samples/sourcemap-inline/command.sh
@@ -1 +1 @@
-svelte compile src/Main.html -m inline -o actual/Main.js
\ No newline at end of file
+svelte compile src/Main.svelte -m inline -o actual/Main.js
\ No newline at end of file
diff --git a/test/cli/samples/sourcemap-inline/expected/Main.js b/test/cli/samples/sourcemap-inline/expected/Main.js
index 668ff8b1bf..534c6734f2 100644
--- a/test/cli/samples/sourcemap-inline/expected/Main.js
+++ b/test/cli/samples/sourcemap-inline/expected/Main.js
@@ -1,4 +1,4 @@
-/* src/Main.html generated by Svelte vx.y.z */
+/* src/Main.svelte generated by Svelte vx.y.z */
 
 function create_main_fragment(component, ctx) {
 	var p;
diff --git a/test/cli/samples/sourcemap/command.sh b/test/cli/samples/sourcemap/command.sh
index 4309d50b89..9164b1760c 100644
--- a/test/cli/samples/sourcemap/command.sh
+++ b/test/cli/samples/sourcemap/command.sh
@@ -1 +1 @@
-svelte compile src/Main.html -m -o actual/Main.js
\ No newline at end of file
+svelte compile src/Main.svelte -m -o actual/Main.js
\ No newline at end of file
diff --git a/test/cli/samples/sourcemap/expected/Main.js b/test/cli/samples/sourcemap/expected/Main.js
index 95e6718715..59059aadcb 100644
--- a/test/cli/samples/sourcemap/expected/Main.js
+++ b/test/cli/samples/sourcemap/expected/Main.js
@@ -1,4 +1,4 @@
-/* src/Main.html generated by Svelte vx.y.z */
+/* src/Main.svelte generated by Svelte vx.y.z */
 
 function create_main_fragment(component, ctx) {
 	var p;
diff --git a/test/cli/samples/sourcemap/expected/Main.js.map b/test/cli/samples/sourcemap/expected/Main.js.map
index a3be94cb9a..a31dec16ab 100644
--- a/test/cli/samples/sourcemap/expected/Main.js.map
+++ b/test/cli/samples/sourcemap/expected/Main.js.map
@@ -1 +1 @@
-{"version":3,"file":"Main.js","sources":["../src/Main.html"],"sourcesContent":["<p>Hello world!</p>\n\n<script>\n\texport default {\n\t\tonrender () {\n\t\t\tconsole.log( 'here' );\n\t\t}\n\t};\n</script>"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"}
\ No newline at end of file
+{"version":3,"file":"Main.js","sources":["../src/Main.svelte"],"sourcesContent":["<p>Hello world!</p>\n\n<script>\n\texport default {\n\t\tonrender () {\n\t\t\tconsole.log( 'here' );\n\t\t}\n\t};\n</script>"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;"}
\ No newline at end of file
diff --git a/test/cli/samples/ssr/command.sh b/test/cli/samples/ssr/command.sh
index 30e155691a..878f6038ab 100644
--- a/test/cli/samples/ssr/command.sh
+++ b/test/cli/samples/ssr/command.sh
@@ -1 +1 @@
-svelte compile --generate ssr src/Main.html > actual/Main.js
+svelte compile --generate ssr src/Main.svelte > actual/Main.js
diff --git a/test/cli/samples/ssr/expected/Main.js b/test/cli/samples/ssr/expected/Main.js
index adf4e19fa0..b7a4f4addf 100644
--- a/test/cli/samples/ssr/expected/Main.js
+++ b/test/cli/samples/ssr/expected/Main.js
@@ -2,7 +2,7 @@
 
 var Main = {};
 
-Main.filename = "src/Main.html";
+Main.filename = "src/Main.svelte";
 
 Main.data = function() {
 	return {};
diff --git a/test/cli/samples/store/command.sh b/test/cli/samples/store/command.sh
index a734fdc772..dedeae05ef 100644
--- a/test/cli/samples/store/command.sh
+++ b/test/cli/samples/store/command.sh
@@ -1 +1 @@
-svelte compile src/Main.html --store > actual/Main.js
+svelte compile src/Main.svelte --store > actual/Main.js
diff --git a/test/cli/samples/store/expected/Main.js b/test/cli/samples/store/expected/Main.js
index dbd365c15d..28bc62b786 100644
--- a/test/cli/samples/store/expected/Main.js
+++ b/test/cli/samples/store/expected/Main.js
@@ -1,4 +1,4 @@
-/* src/Main.html generated by Svelte vx.y.z */
+/* src/Main.svelte generated by Svelte vx.y.z */
 
 function create_main_fragment(component, ctx) {
 	var h1, text0, text1;
diff --git a/test/css/index.js b/test/css/index.js
index 913dcf4237..9e32b0ea5d 100644
--- a/test/css/index.js
+++ b/test/css/index.js
@@ -51,7 +51,7 @@ describe('css', () => {
 		(solo ? it.only : skip ? it.skip : it)(dir, () => {
 			const config = tryRequire(`./samples/${dir}/_config.js`) || {};
 			const input = fs
-				.readFileSync(`test/css/samples/${dir}/input.html`, 'utf-8')
+				.readFileSync(`test/css/samples/${dir}/input.svelte`, 'utf-8')
 				.replace(/\s+$/, '');
 
 			const expectedWarnings = (config.warnings || []).map(normalizeWarning);
diff --git a/test/css/samples/combinator-child/expected.svelte b/test/css/samples/combinator-child/expected.html
similarity index 100%
rename from test/css/samples/combinator-child/expected.svelte
rename to test/css/samples/combinator-child/expected.html
diff --git a/test/css/samples/descendant-selector-non-top-level-outer/expected.svelte b/test/css/samples/descendant-selector-non-top-level-outer/expected.html
similarity index 100%
rename from test/css/samples/descendant-selector-non-top-level-outer/expected.svelte
rename to test/css/samples/descendant-selector-non-top-level-outer/expected.html
diff --git a/test/css/samples/empty-class/_config.js b/test/css/samples/empty-class/_config.js
index fb1565c7bc..cc766d9478 100644
--- a/test/css/samples/empty-class/_config.js
+++ b/test/css/samples/empty-class/_config.js
@@ -1,6 +1,6 @@
 export default {
 	warnings: [{
-		filename: "SvelteComponent.html",
+		filename: "SvelteComponent.svelte",
 		code: `css-unused-selector`,
 		message: "Unused CSS selector",
 		start: {
diff --git a/test/css/samples/nested/expected.svelte b/test/css/samples/nested/expected.html
similarity index 100%
rename from test/css/samples/nested/expected.svelte
rename to test/css/samples/nested/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-attribute-selector-contains/expected.svelte b/test/css/samples/omit-scoping-attribute-attribute-selector-contains/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-attribute-selector-contains/expected.svelte
rename to test/css/samples/omit-scoping-attribute-attribute-selector-contains/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-attribute-selector-equals-case-insensitive/expected.svelte b/test/css/samples/omit-scoping-attribute-attribute-selector-equals-case-insensitive/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-attribute-selector-equals-case-insensitive/expected.svelte
rename to test/css/samples/omit-scoping-attribute-attribute-selector-equals-case-insensitive/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-attribute-selector-equals-dynamic/expected.svelte b/test/css/samples/omit-scoping-attribute-attribute-selector-equals-dynamic/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-attribute-selector-equals-dynamic/expected.svelte
rename to test/css/samples/omit-scoping-attribute-attribute-selector-equals-dynamic/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-attribute-selector-equals/expected.svelte b/test/css/samples/omit-scoping-attribute-attribute-selector-equals/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-attribute-selector-equals/expected.svelte
rename to test/css/samples/omit-scoping-attribute-attribute-selector-equals/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-attribute-selector-pipe-equals/expected.svelte b/test/css/samples/omit-scoping-attribute-attribute-selector-pipe-equals/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-attribute-selector-pipe-equals/expected.svelte
rename to test/css/samples/omit-scoping-attribute-attribute-selector-pipe-equals/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-attribute-selector-prefix/expected.svelte b/test/css/samples/omit-scoping-attribute-attribute-selector-prefix/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-attribute-selector-prefix/expected.svelte
rename to test/css/samples/omit-scoping-attribute-attribute-selector-prefix/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-attribute-selector-suffix/expected.svelte b/test/css/samples/omit-scoping-attribute-attribute-selector-suffix/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-attribute-selector-suffix/expected.svelte
rename to test/css/samples/omit-scoping-attribute-attribute-selector-suffix/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-attribute-selector-word-equals/expected.svelte b/test/css/samples/omit-scoping-attribute-attribute-selector-word-equals/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-attribute-selector-word-equals/expected.svelte
rename to test/css/samples/omit-scoping-attribute-attribute-selector-word-equals/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-attribute-selector/expected.svelte b/test/css/samples/omit-scoping-attribute-attribute-selector/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-attribute-selector/expected.svelte
rename to test/css/samples/omit-scoping-attribute-attribute-selector/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-class-dynamic/expected.svelte b/test/css/samples/omit-scoping-attribute-class-dynamic/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-class-dynamic/expected.svelte
rename to test/css/samples/omit-scoping-attribute-class-dynamic/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-class-static/expected.svelte b/test/css/samples/omit-scoping-attribute-class-static/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-class-static/expected.svelte
rename to test/css/samples/omit-scoping-attribute-class-static/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-descendant-global-inner-class/expected.svelte b/test/css/samples/omit-scoping-attribute-descendant-global-inner-class/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-descendant-global-inner-class/expected.svelte
rename to test/css/samples/omit-scoping-attribute-descendant-global-inner-class/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-descendant-global-inner-multiple/expected.svelte b/test/css/samples/omit-scoping-attribute-descendant-global-inner-multiple/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-descendant-global-inner-multiple/expected.svelte
rename to test/css/samples/omit-scoping-attribute-descendant-global-inner-multiple/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-descendant-global-inner/expected.svelte b/test/css/samples/omit-scoping-attribute-descendant-global-inner/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-descendant-global-inner/expected.svelte
rename to test/css/samples/omit-scoping-attribute-descendant-global-inner/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-descendant-global-outer-multiple/expected.svelte b/test/css/samples/omit-scoping-attribute-descendant-global-outer-multiple/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-descendant-global-outer-multiple/expected.svelte
rename to test/css/samples/omit-scoping-attribute-descendant-global-outer-multiple/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-descendant-global-outer/expected.svelte b/test/css/samples/omit-scoping-attribute-descendant-global-outer/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-descendant-global-outer/expected.svelte
rename to test/css/samples/omit-scoping-attribute-descendant-global-outer/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-descendant/expected.svelte b/test/css/samples/omit-scoping-attribute-descendant/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-descendant/expected.svelte
rename to test/css/samples/omit-scoping-attribute-descendant/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-global/expected.svelte b/test/css/samples/omit-scoping-attribute-global/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-global/expected.svelte
rename to test/css/samples/omit-scoping-attribute-global/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-id/expected.svelte b/test/css/samples/omit-scoping-attribute-id/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-id/expected.svelte
rename to test/css/samples/omit-scoping-attribute-id/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-whitespace-multiple/expected.svelte b/test/css/samples/omit-scoping-attribute-whitespace-multiple/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-whitespace-multiple/expected.svelte
rename to test/css/samples/omit-scoping-attribute-whitespace-multiple/expected.html
diff --git a/test/css/samples/omit-scoping-attribute-whitespace/expected.svelte b/test/css/samples/omit-scoping-attribute-whitespace/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute-whitespace/expected.svelte
rename to test/css/samples/omit-scoping-attribute-whitespace/expected.html
diff --git a/test/css/samples/omit-scoping-attribute/expected.svelte b/test/css/samples/omit-scoping-attribute/expected.html
similarity index 100%
rename from test/css/samples/omit-scoping-attribute/expected.svelte
rename to test/css/samples/omit-scoping-attribute/expected.html
diff --git a/test/css/samples/unused-selector-leading/_config.js b/test/css/samples/unused-selector-leading/_config.js
index c01e978405..20310a5847 100644
--- a/test/css/samples/unused-selector-leading/_config.js
+++ b/test/css/samples/unused-selector-leading/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			filename: "SvelteComponent.html",
+			filename: "SvelteComponent.svelte",
 			code: `css-unused-selector`,
 			message: "Unused CSS selector",
 			start: {
@@ -25,7 +25,7 @@ export default {
 		},
 
 		{
-			filename: "SvelteComponent.html",
+			filename: "SvelteComponent.svelte",
 			code: `css-unused-selector`,
 			message: "Unused CSS selector",
 			start: {
diff --git a/test/css/samples/unused-selector-leading/expected.svelte b/test/css/samples/unused-selector-leading/expected.html
similarity index 100%
rename from test/css/samples/unused-selector-leading/expected.svelte
rename to test/css/samples/unused-selector-leading/expected.html
diff --git a/test/css/samples/unused-selector-ternary/_config.js b/test/css/samples/unused-selector-ternary/_config.js
index 043a7addf9..68254477d9 100644
--- a/test/css/samples/unused-selector-ternary/_config.js
+++ b/test/css/samples/unused-selector-ternary/_config.js
@@ -4,7 +4,7 @@ export default {
 	},
 
 	warnings: [{
-		filename: "SvelteComponent.html",
+		filename: "SvelteComponent.svelte",
 		code: `css-unused-selector`,
 		message: "Unused CSS selector",
 		start: {
diff --git a/test/css/samples/unused-selector-ternary/expected.svelte b/test/css/samples/unused-selector-ternary/expected.html
similarity index 100%
rename from test/css/samples/unused-selector-ternary/expected.svelte
rename to test/css/samples/unused-selector-ternary/expected.html
diff --git a/test/css/samples/unused-selector/_config.js b/test/css/samples/unused-selector/_config.js
index 5f6abbc08b..49fb3a27e7 100644
--- a/test/css/samples/unused-selector/_config.js
+++ b/test/css/samples/unused-selector/_config.js
@@ -1,6 +1,6 @@
 export default {
 	warnings: [{
-		filename: "SvelteComponent.html",
+		filename: "SvelteComponent.svelte",
 		code: `css-unused-selector`,
 		message: "Unused CSS selector",
 		start: {
diff --git a/test/css/samples/unused-selector/expected.svelte b/test/css/samples/unused-selector/expected.html
similarity index 100%
rename from test/css/samples/unused-selector/expected.svelte
rename to test/css/samples/unused-selector/expected.html
diff --git a/test/custom-elements/index.js b/test/custom-elements/index.js
index e50434cc61..d2641cb5b0 100644
--- a/test/custom-elements/index.js
+++ b/test/custom-elements/index.js
@@ -72,7 +72,7 @@ describe('custom-elements', function() {
 						},
 
 						transform(code, id) {
-							if (id.endsWith('.html')) {
+							if (id.endsWith('.svelte')) {
 								const compiled = svelte.compile(code, {
 									customElement: true,
 									dev: config.dev
diff --git a/test/custom-elements/samples/custom-method/test.js b/test/custom-elements/samples/custom-method/test.js
index 2233f0b452..e274786079 100644
--- a/test/custom-elements/samples/custom-method/test.js
+++ b/test/custom-elements/samples/custom-method/test.js
@@ -1,5 +1,5 @@
 import * as assert from 'assert';
-import './main.html';
+import './main.svelte';
 
 export default async function (target) {
 	target.innerHTML = '<custom-element></custom-element>';
diff --git a/test/custom-elements/samples/escaped-css/test.js b/test/custom-elements/samples/escaped-css/test.js
index bd148ad5a7..3696ee8c1b 100644
--- a/test/custom-elements/samples/escaped-css/test.js
+++ b/test/custom-elements/samples/escaped-css/test.js
@@ -1,5 +1,5 @@
 import * as assert from 'assert';
-import CustomElement from './main.html';
+import CustomElement from './main.svelte';
 
 export default function (target) {
 	new CustomElement({
diff --git a/test/custom-elements/samples/html-slots/test.js b/test/custom-elements/samples/html-slots/test.js
index 87cfd2029d..bb38a83eab 100644
--- a/test/custom-elements/samples/html-slots/test.js
+++ b/test/custom-elements/samples/html-slots/test.js
@@ -1,5 +1,5 @@
 import * as assert from 'assert';
-import './main.html';
+import './main.svelte';
 
 export default function (target) {
 	target.innerHTML = `
diff --git a/test/custom-elements/samples/html/test.js b/test/custom-elements/samples/html/test.js
index 732d79f009..1638ead784 100644
--- a/test/custom-elements/samples/html/test.js
+++ b/test/custom-elements/samples/html/test.js
@@ -1,5 +1,5 @@
 import * as assert from 'assert';
-import './main.html';
+import './main.svelte';
 
 export default function (target) {
 	target.innerHTML = '<custom-element name="world"></custom-element>';
diff --git a/test/custom-elements/samples/nested.skip/test.js b/test/custom-elements/samples/nested.skip/test.js
index d6d52426af..85320297ea 100644
--- a/test/custom-elements/samples/nested.skip/test.js
+++ b/test/custom-elements/samples/nested.skip/test.js
@@ -1,5 +1,5 @@
 import * as assert from 'assert';
-import './main.html';
+import './main.svelte';
 
 export default async function (target) {
 	target.innerHTML = '<my-app/>';
diff --git a/test/custom-elements/samples/new-styled/test.js b/test/custom-elements/samples/new-styled/test.js
index 6bb37d7a2a..f027121009 100644
--- a/test/custom-elements/samples/new-styled/test.js
+++ b/test/custom-elements/samples/new-styled/test.js
@@ -1,5 +1,5 @@
 import * as assert from 'assert';
-import CustomElement from './main.html';
+import CustomElement from './main.svelte';
 
 export default function (target) {
 	target.innerHTML = '<p>unstyled</p>';
diff --git a/test/custom-elements/samples/new/test.js b/test/custom-elements/samples/new/test.js
index f37f4301fb..1137495e35 100644
--- a/test/custom-elements/samples/new/test.js
+++ b/test/custom-elements/samples/new/test.js
@@ -1,5 +1,5 @@
 import * as assert from 'assert';
-import CustomElement from './main.html';
+import CustomElement from './main.svelte';
 
 export default function (target) {
 	new CustomElement({
diff --git a/test/custom-elements/samples/no-missing-prop-warnings/test.js b/test/custom-elements/samples/no-missing-prop-warnings/test.js
index 9430e97f3a..e7ced25e19 100644
--- a/test/custom-elements/samples/no-missing-prop-warnings/test.js
+++ b/test/custom-elements/samples/no-missing-prop-warnings/test.js
@@ -1,5 +1,5 @@
 import * as assert from 'assert';
-import './main.html';
+import './main.svelte';
 
 export default function (target) {
 	const warnings = [];
diff --git a/test/custom-elements/samples/oncreate/test.js b/test/custom-elements/samples/oncreate/test.js
index a64a8c9fec..11d76078f2 100644
--- a/test/custom-elements/samples/oncreate/test.js
+++ b/test/custom-elements/samples/oncreate/test.js
@@ -1,5 +1,5 @@
 import * as assert from 'assert';
-import './main.html';
+import './main.svelte';
 
 export default function (target) {
 	target.innerHTML = '<my-app/>';
diff --git a/test/custom-elements/samples/props/test.js b/test/custom-elements/samples/props/test.js
index 1e95fe3ad2..9c7e44c3a3 100644
--- a/test/custom-elements/samples/props/test.js
+++ b/test/custom-elements/samples/props/test.js
@@ -1,5 +1,5 @@
 import * as assert from 'assert';
-import CustomElement from './main.html';
+import CustomElement from './main.svelte';
 
 export default function (target) {
 	new CustomElement({
diff --git a/test/helpers.js b/test/helpers.js
index f2e2004f09..b7064c99eb 100644
--- a/test/helpers.js
+++ b/test/helpers.js
@@ -171,7 +171,7 @@ export function addLineNumbers(code) {
 }
 
 export function showOutput(cwd, options = {}, compile = svelte.compile) {
-	glob('**/*.html', { cwd }).forEach(file => {
+	glob('**/*.svelte', { cwd }).forEach(file => {
 		if (file[0] === '_') return;
 
 		const { js } = compile(
diff --git a/test/hydration/index.js b/test/hydration/index.js
index 8b66937329..24c61fb56a 100644
--- a/test/hydration/index.js
+++ b/test/hydration/index.js
@@ -18,7 +18,7 @@ describe('hydration', () => {
 	before(() => {
 		const svelte = loadSvelte();
 
-		require.extensions['.html'] = function(module, filename) {
+		require.extensions['.svelte'] = function(module, filename) {
 			const options = Object.assign(
 				{
 					filename,
@@ -62,7 +62,7 @@ describe('hydration', () => {
 				let SvelteComponent;
 
 				try {
-					SvelteComponent = require(`${cwd}/main.html`).default;
+					SvelteComponent = require(`${cwd}/main.svelte`).default;
 				} catch (err) {
 					throw err;
 				}
diff --git a/test/hydration/samples/basic/_after.svelte b/test/hydration/samples/basic/_after.html
similarity index 100%
rename from test/hydration/samples/basic/_after.svelte
rename to test/hydration/samples/basic/_after.html
diff --git a/test/hydration/samples/basic/_before.svelte b/test/hydration/samples/basic/_before.html
similarity index 100%
rename from test/hydration/samples/basic/_before.svelte
rename to test/hydration/samples/basic/_before.html
diff --git a/test/hydration/samples/binding-input/_after.svelte b/test/hydration/samples/binding-input/_after.html
similarity index 100%
rename from test/hydration/samples/binding-input/_after.svelte
rename to test/hydration/samples/binding-input/_after.html
diff --git a/test/hydration/samples/binding-input/_before.svelte b/test/hydration/samples/binding-input/_before.html
similarity index 100%
rename from test/hydration/samples/binding-input/_before.svelte
rename to test/hydration/samples/binding-input/_before.html
diff --git a/test/hydration/samples/component-in-element/_after.svelte b/test/hydration/samples/component-in-element/_after.html
similarity index 100%
rename from test/hydration/samples/component-in-element/_after.svelte
rename to test/hydration/samples/component-in-element/_after.html
diff --git a/test/hydration/samples/component-in-element/_before.svelte b/test/hydration/samples/component-in-element/_before.html
similarity index 100%
rename from test/hydration/samples/component-in-element/_before.svelte
rename to test/hydration/samples/component-in-element/_before.html
diff --git a/test/hydration/samples/component/_after.svelte b/test/hydration/samples/component/_after.html
similarity index 100%
rename from test/hydration/samples/component/_after.svelte
rename to test/hydration/samples/component/_after.html
diff --git a/test/hydration/samples/component/_before.svelte b/test/hydration/samples/component/_before.html
similarity index 100%
rename from test/hydration/samples/component/_before.svelte
rename to test/hydration/samples/component/_before.html
diff --git a/test/hydration/samples/dynamic-text-changed/_after.svelte b/test/hydration/samples/dynamic-text-changed/_after.html
similarity index 100%
rename from test/hydration/samples/dynamic-text-changed/_after.svelte
rename to test/hydration/samples/dynamic-text-changed/_after.html
diff --git a/test/hydration/samples/dynamic-text-changed/_before.svelte b/test/hydration/samples/dynamic-text-changed/_before.html
similarity index 100%
rename from test/hydration/samples/dynamic-text-changed/_before.svelte
rename to test/hydration/samples/dynamic-text-changed/_before.html
diff --git a/test/hydration/samples/dynamic-text/_after.svelte b/test/hydration/samples/dynamic-text/_after.html
similarity index 100%
rename from test/hydration/samples/dynamic-text/_after.svelte
rename to test/hydration/samples/dynamic-text/_after.html
diff --git a/test/hydration/samples/dynamic-text/_before.svelte b/test/hydration/samples/dynamic-text/_before.html
similarity index 100%
rename from test/hydration/samples/dynamic-text/_before.svelte
rename to test/hydration/samples/dynamic-text/_before.html
diff --git a/test/hydration/samples/each-block-arg-clash/_after.svelte b/test/hydration/samples/each-block-arg-clash/_after.html
similarity index 100%
rename from test/hydration/samples/each-block-arg-clash/_after.svelte
rename to test/hydration/samples/each-block-arg-clash/_after.html
diff --git a/test/hydration/samples/each-block-arg-clash/_before.svelte b/test/hydration/samples/each-block-arg-clash/_before.html
similarity index 100%
rename from test/hydration/samples/each-block-arg-clash/_before.svelte
rename to test/hydration/samples/each-block-arg-clash/_before.html
diff --git a/test/hydration/samples/each-block/_after.svelte b/test/hydration/samples/each-block/_after.html
similarity index 100%
rename from test/hydration/samples/each-block/_after.svelte
rename to test/hydration/samples/each-block/_after.html
diff --git a/test/hydration/samples/each-block/_before.svelte b/test/hydration/samples/each-block/_before.html
similarity index 100%
rename from test/hydration/samples/each-block/_before.svelte
rename to test/hydration/samples/each-block/_before.html
diff --git a/test/hydration/samples/element-attribute-added/_after.svelte b/test/hydration/samples/element-attribute-added/_after.html
similarity index 100%
rename from test/hydration/samples/element-attribute-added/_after.svelte
rename to test/hydration/samples/element-attribute-added/_after.html
diff --git a/test/hydration/samples/element-attribute-added/_before.svelte b/test/hydration/samples/element-attribute-added/_before.html
similarity index 100%
rename from test/hydration/samples/element-attribute-added/_before.svelte
rename to test/hydration/samples/element-attribute-added/_before.html
diff --git a/test/hydration/samples/element-attribute-changed/_after.svelte b/test/hydration/samples/element-attribute-changed/_after.html
similarity index 100%
rename from test/hydration/samples/element-attribute-changed/_after.svelte
rename to test/hydration/samples/element-attribute-changed/_after.html
diff --git a/test/hydration/samples/element-attribute-changed/_before.svelte b/test/hydration/samples/element-attribute-changed/_before.html
similarity index 100%
rename from test/hydration/samples/element-attribute-changed/_before.svelte
rename to test/hydration/samples/element-attribute-changed/_before.html
diff --git a/test/hydration/samples/element-attribute-removed/_after.svelte b/test/hydration/samples/element-attribute-removed/_after.html
similarity index 100%
rename from test/hydration/samples/element-attribute-removed/_after.svelte
rename to test/hydration/samples/element-attribute-removed/_after.html
diff --git a/test/hydration/samples/element-attribute-removed/_before.svelte b/test/hydration/samples/element-attribute-removed/_before.html
similarity index 100%
rename from test/hydration/samples/element-attribute-removed/_before.svelte
rename to test/hydration/samples/element-attribute-removed/_before.html
diff --git a/test/hydration/samples/element-attribute-unchanged/_after.svelte b/test/hydration/samples/element-attribute-unchanged/_after.html
similarity index 100%
rename from test/hydration/samples/element-attribute-unchanged/_after.svelte
rename to test/hydration/samples/element-attribute-unchanged/_after.html
diff --git a/test/hydration/samples/element-attribute-unchanged/_before.svelte b/test/hydration/samples/element-attribute-unchanged/_before.html
similarity index 100%
rename from test/hydration/samples/element-attribute-unchanged/_before.svelte
rename to test/hydration/samples/element-attribute-unchanged/_before.html
diff --git a/test/hydration/samples/element-nested/_after.svelte b/test/hydration/samples/element-nested/_after.html
similarity index 100%
rename from test/hydration/samples/element-nested/_after.svelte
rename to test/hydration/samples/element-nested/_after.html
diff --git a/test/hydration/samples/element-nested/_before.svelte b/test/hydration/samples/element-nested/_before.html
similarity index 100%
rename from test/hydration/samples/element-nested/_before.svelte
rename to test/hydration/samples/element-nested/_before.html
diff --git a/test/hydration/samples/element-ref/_after.svelte b/test/hydration/samples/element-ref/_after.html
similarity index 100%
rename from test/hydration/samples/element-ref/_after.svelte
rename to test/hydration/samples/element-ref/_after.html
diff --git a/test/hydration/samples/element-ref/_before.svelte b/test/hydration/samples/element-ref/_before.html
similarity index 100%
rename from test/hydration/samples/element-ref/_before.svelte
rename to test/hydration/samples/element-ref/_before.html
diff --git a/test/hydration/samples/event-handler/_after.svelte b/test/hydration/samples/event-handler/_after.html
similarity index 100%
rename from test/hydration/samples/event-handler/_after.svelte
rename to test/hydration/samples/event-handler/_after.html
diff --git a/test/hydration/samples/event-handler/_before.svelte b/test/hydration/samples/event-handler/_before.html
similarity index 100%
rename from test/hydration/samples/event-handler/_before.svelte
rename to test/hydration/samples/event-handler/_before.html
diff --git a/test/hydration/samples/if-block-anchor/_after.svelte b/test/hydration/samples/if-block-anchor/_after.html
similarity index 100%
rename from test/hydration/samples/if-block-anchor/_after.svelte
rename to test/hydration/samples/if-block-anchor/_after.html
diff --git a/test/hydration/samples/if-block-anchor/_before.svelte b/test/hydration/samples/if-block-anchor/_before.html
similarity index 100%
rename from test/hydration/samples/if-block-anchor/_before.svelte
rename to test/hydration/samples/if-block-anchor/_before.html
diff --git a/test/hydration/samples/if-block-false/_after.svelte b/test/hydration/samples/if-block-false/_after.html
similarity index 100%
rename from test/hydration/samples/if-block-false/_after.svelte
rename to test/hydration/samples/if-block-false/_after.html
diff --git a/test/hydration/samples/if-block-false/_before.svelte b/test/hydration/samples/if-block-false/_before.html
similarity index 100%
rename from test/hydration/samples/if-block-false/_before.svelte
rename to test/hydration/samples/if-block-false/_before.html
diff --git a/test/hydration/samples/if-block-update/_after.svelte b/test/hydration/samples/if-block-update/_after.html
similarity index 100%
rename from test/hydration/samples/if-block-update/_after.svelte
rename to test/hydration/samples/if-block-update/_after.html
diff --git a/test/hydration/samples/if-block-update/_before.svelte b/test/hydration/samples/if-block-update/_before.html
similarity index 100%
rename from test/hydration/samples/if-block-update/_before.svelte
rename to test/hydration/samples/if-block-update/_before.html
diff --git a/test/hydration/samples/if-block/_after.svelte b/test/hydration/samples/if-block/_after.html
similarity index 100%
rename from test/hydration/samples/if-block/_after.svelte
rename to test/hydration/samples/if-block/_after.html
diff --git a/test/hydration/samples/if-block/_before.svelte b/test/hydration/samples/if-block/_before.html
similarity index 100%
rename from test/hydration/samples/if-block/_before.svelte
rename to test/hydration/samples/if-block/_before.html
diff --git a/test/hydration/samples/raw/_after.svelte b/test/hydration/samples/raw/_after.html
similarity index 100%
rename from test/hydration/samples/raw/_after.svelte
rename to test/hydration/samples/raw/_after.html
diff --git a/test/hydration/samples/raw/_before.svelte b/test/hydration/samples/raw/_before.html
similarity index 100%
rename from test/hydration/samples/raw/_before.svelte
rename to test/hydration/samples/raw/_before.html
diff --git a/test/hydration/samples/top-level-text/_after.svelte b/test/hydration/samples/top-level-text/_after.html
similarity index 100%
rename from test/hydration/samples/top-level-text/_after.svelte
rename to test/hydration/samples/top-level-text/_after.html
diff --git a/test/hydration/samples/top-level-text/_before.svelte b/test/hydration/samples/top-level-text/_before.html
similarity index 100%
rename from test/hydration/samples/top-level-text/_before.svelte
rename to test/hydration/samples/top-level-text/_before.html
diff --git a/test/js/index.js b/test/js/index.js
index d6cb71e416..77da160591 100644
--- a/test/js/index.js
+++ b/test/js/index.js
@@ -18,7 +18,7 @@ describe("js", () => {
 			dir = path.resolve("test/js/samples", dir);
 			const config = loadConfig(`${dir}/_config.js`);
 
-			const input = fs.readFileSync(`${dir}/input.html`, "utf-8").replace(/\s+$/, "");
+			const input = fs.readFileSync(`${dir}/input.svelte`, "utf-8").replace(/\s+$/, "");
 
 			let actual;
 
diff --git a/test/js/samples/dynamic-import/expected.js b/test/js/samples/dynamic-import/expected.js
index f4304f53ef..c7a82698c2 100644
--- a/test/js/samples/dynamic-import/expected.js
+++ b/test/js/samples/dynamic-import/expected.js
@@ -1,6 +1,6 @@
 /* generated by Svelte vX.Y.Z */
 import { SvelteComponent as SvelteComponent_1, init, mount_component, noop, safe_not_equal } from "svelte/internal";
-import LazyLoad from "./LazyLoad.html";
+import LazyLoad from "./LazyLoad.svelte";
 
 function create_fragment(ctx) {
 	var current;
@@ -38,7 +38,7 @@ function create_fragment(ctx) {
 }
 
 function func() {
-	return import('./Foo.html');
+	return import('./Foo.svelte');
 }
 
 class SvelteComponent extends SvelteComponent_1 {
diff --git a/test/js/samples/non-imported-component/expected.js b/test/js/samples/non-imported-component/expected.js
index b79dd60512..ee31f589ea 100644
--- a/test/js/samples/non-imported-component/expected.js
+++ b/test/js/samples/non-imported-component/expected.js
@@ -1,6 +1,6 @@
 /* generated by Svelte vX.Y.Z */
 import { SvelteComponent as SvelteComponent_1, createText, detachNode, init, insert, mount_component, noop, safe_not_equal } from "svelte/internal";
-import Imported from "Imported.html";
+import Imported from "Imported.svelte";
 
 function create_fragment(ctx) {
 	var text, current;
diff --git a/test/parser/index.js b/test/parser/index.js
index 900cc3ae05..990a8751ef 100644
--- a/test/parser/index.js
+++ b/test/parser/index.js
@@ -18,7 +18,7 @@ describe('parse', () => {
 		(solo ? it.only : it)(dir, () => {
 			const options = tryToLoadJson(`test/parser/samples/${dir}/options.json`) || {};
 
-			const input = fs.readFileSync(`test/parser/samples/${dir}/input.html`, 'utf-8').replace(/\s+$/, '');
+			const input = fs.readFileSync(`test/parser/samples/${dir}/input.svelte`, 'utf-8').replace(/\s+$/, '');
 			const expectedOutput = tryToLoadJson(`test/parser/samples/${dir}/output.json`);
 			const expectedError = tryToLoadJson(`test/parser/samples/${dir}/error.json`);
 
diff --git a/test/preprocess/index.js b/test/preprocess/index.js
index fddc14ec94..8d114ab7b3 100644
--- a/test/preprocess/index.js
+++ b/test/preprocess/index.js
@@ -13,8 +13,8 @@ describe('preprocess', () => {
 		}
 
 		(config.skip ? it.skip : config.solo ? it.only : it)(dir, async () => {
-			const input = fs.readFileSync(`test/preprocess/samples/${dir}/input.html`, 'utf-8');
-			const expected = fs.readFileSync(`test/preprocess/samples/${dir}/output.html`, 'utf-8');
+			const input = fs.readFileSync(`test/preprocess/samples/${dir}/input.svelte`, 'utf-8');
+			const expected = fs.readFileSync(`test/preprocess/samples/${dir}/output.svelte`, 'utf-8');
 
 			const result = await svelte.preprocess(input, config.preprocess);
 			fs.writeFileSync(`test/preprocess/samples/${dir}/_actual.html`, result.code);
diff --git a/test/preprocess/samples/filename/_config.js b/test/preprocess/samples/filename/_config.js
index d7a3c19770..c71cdafcac 100644
--- a/test/preprocess/samples/filename/_config.js
+++ b/test/preprocess/samples/filename/_config.js
@@ -1,6 +1,6 @@
 export default {
 	preprocess: {
-		filename: 'file.html',
+		filename: 'file.svelte',
 		markup: ({ content, filename }) => {
 			return {
 				code: content.replace('__MARKUP_FILENAME__', filename)
diff --git a/test/preprocess/samples/filename/output.svelte b/test/preprocess/samples/filename/output.svelte
index 1dcf67cc00..9eece2e222 100644
--- a/test/preprocess/samples/filename/output.svelte
+++ b/test/preprocess/samples/filename/output.svelte
@@ -1,3 +1,3 @@
-<h1>Hello file.html!</h1>
-<style>.red { color: file.html; }</style>
+<h1>Hello file.svelte!</h1>
+<style>.red { color: file.svelte; }</style>
 <script>console.log('file.svelte');</script>
\ No newline at end of file
diff --git a/test/runtime/index.js b/test/runtime/index.js
index cd9a2a4946..002ca2605f 100644
--- a/test/runtime/index.js
+++ b/test/runtime/index.js
@@ -27,7 +27,7 @@ describe("runtime", () => {
 		svelte = loadSvelte(false);
 		svelte$ = loadSvelte(true);
 
-		require.extensions[".html"] = function(module, filename) {
+		require.extensions[".svelte"] = function(module, filename) {
 			const options = Object.assign({
 				filename,
 				format: 'cjs',
@@ -74,7 +74,7 @@ describe("runtime", () => {
 			compileOptions.immutable = config.immutable;
 
 			Object.keys(require.cache)
-				.filter(x => x.endsWith(".html"))
+				.filter(x => x.endsWith(".svelte"))
 				.forEach(file => {
 					delete require.cache[file];
 				});
@@ -111,7 +111,7 @@ describe("runtime", () => {
 					};
 
 					try {
-						mod = require(`./samples/${dir}/main.html`);
+						mod = require(`./samples/${dir}/main.svelte`);
 						SvelteComponent = mod.default;
 					} catch (err) {
 						showOutput(cwd, compileOptions, svelte.compile); // eslint-disable-line no-console
diff --git a/test/runtime/samples/component-binding-deep-b/ComponentSelector.svelte b/test/runtime/samples/component-binding-deep-b/ComponentSelector.svelte
index 0edb702f10..9b55ab769d 100644
--- a/test/runtime/samples/component-binding-deep-b/ComponentSelector.svelte
+++ b/test/runtime/samples/component-binding-deep-b/ComponentSelector.svelte
@@ -1,5 +1,5 @@
 <select bind:value={selectedComponent}>
 	{#each components as component}
-		<option value='{component}'>{component.name}.html</option>
+		<option value='{component}'>{component.name}.svelte</option>
 	{/each}
 </select>
\ No newline at end of file
diff --git a/test/runtime/samples/component-binding-deep-b/_config.js b/test/runtime/samples/component-binding-deep-b/_config.js
index f701a36fac..5adee6eac1 100644
--- a/test/runtime/samples/component-binding-deep-b/_config.js
+++ b/test/runtime/samples/component-binding-deep-b/_config.js
@@ -21,8 +21,8 @@ export default {
 
 	html: `
 		<select>
-			<option value='[object Object]'>One.html</option>
-			<option value='[object Object]'>Two.html</option>
+			<option value='[object Object]'>One.svelte</option>
+			<option value='[object Object]'>Two.svelte</option>
 		</select>
 
 		<textarea></textarea>
@@ -40,8 +40,8 @@ export default {
 		assert.equal(component.compiled, 'ONE SOURCE CHANGED\nTWO SOURCE');
 		assert.htmlEqual(target.innerHTML, `
 			<select>
-				<option value='[object Object]'>One.html</option>
-				<option value='[object Object]'>Two.html</option>
+				<option value='[object Object]'>One.svelte</option>
+				<option value='[object Object]'>Two.svelte</option>
 			</select>
 
 			<textarea></textarea>
@@ -70,8 +70,8 @@ export default {
 		assert.equal(component.compiled, 'ONE SOURCE CHANGED\nTWO SOURCE CHANGED');
 		assert.htmlEqual(target.innerHTML, `
 			<select>
-				<option value='[object Object]'>One.html</option>
-				<option value='[object Object]'>Two.html</option>
+				<option value='[object Object]'>One.svelte</option>
+				<option value='[object Object]'>Two.svelte</option>
 			</select>
 
 			<textarea></textarea>
diff --git a/test/runtime/samples/element-source-location/_config.js b/test/runtime/samples/element-source-location/_config.js
index 7733688f23..61ae36d107 100644
--- a/test/runtime/samples/element-source-location/_config.js
+++ b/test/runtime/samples/element-source-location/_config.js
@@ -10,14 +10,14 @@ export default {
 		const p = target.querySelector('p');
 
 		assert.deepEqual(h1.__svelte_meta.loc, {
-			file: path.relative(process.cwd(), path.resolve(__dirname, 'main.html')),
+			file: path.relative(process.cwd(), path.resolve(__dirname, 'main.svelte')),
 			line: 4,
 			column: 0,
-			char: 51
+			char: 53
 		});
 
 		assert.deepEqual(p.__svelte_meta.loc, {
-			file: path.relative(process.cwd(), path.resolve(__dirname, 'Foo.html')),
+			file: path.relative(process.cwd(), path.resolve(__dirname, 'Foo.svelte')),
 			line: 1,
 			column: 1,
 			char: 7
diff --git a/test/server-side-rendering/index.js b/test/server-side-rendering/index.js
index a23936bba3..6a546b0b7b 100644
--- a/test/server-side-rendering/index.js
+++ b/test/server-side-rendering/index.js
@@ -46,15 +46,7 @@ describe("ssr", () => {
 		(solo ? it.only : it)(dir, () => {
 			dir = path.resolve("test/server-side-rendering/samples", dir);
 			try {
-				let Component;
-
-				const mainHtmlFile = `${dir}/main.html`;
-				const mainSvelteFile = `${dir}/main.svelte`;
-				if (fs.existsSync(mainHtmlFile)) {
-					Component = require(mainHtmlFile).default;
-				} else if (fs.existsSync(mainSvelteFile)) {
-					Component = require(mainSvelteFile).default;
-				}
+				const Component = require(`${dir}/main.svelte`).default;
 
 				const expectedHtml = tryToReadFile(`${dir}/_expected.html`);
 				const expectedCss = tryToReadFile(`${dir}/_expected.css`) || "";
@@ -104,7 +96,7 @@ describe("ssr", () => {
 		(config.skip ? it.skip : config.solo ? it.only : it)(dir, () => {
 			const cwd = path.resolve("test/runtime/samples", dir);
 
-			glob('**/*.html', { cwd: `test/runtime/samples/${dir}` }).forEach(file => {
+			glob('**/*.svelte', { cwd: `test/runtime/samples/${dir}` }).forEach(file => {
 				const resolved = require.resolve(`../runtime/samples/${dir}/${file}`);
 				delete require.cache[resolved];
 			});
@@ -118,7 +110,7 @@ describe("ssr", () => {
 			try {
 				if (config.before_test) config.before_test();
 
-				const Component = require(`../runtime/samples/${dir}/main.html`).default;
+				const Component = require(`../runtime/samples/${dir}/main.svelte`).default;
 				const { html } = Component.render(config.props, {
 					store: (config.store !== true) && config.store
 				});
diff --git a/test/server-side-rendering/samples/attribute-boolean/_expected.svelte b/test/server-side-rendering/samples/attribute-boolean/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/attribute-boolean/_expected.svelte
rename to test/server-side-rendering/samples/attribute-boolean/_expected.html
diff --git a/test/server-side-rendering/samples/attribute-dynamic/_expected.svelte b/test/server-side-rendering/samples/attribute-dynamic/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/attribute-dynamic/_expected.svelte
rename to test/server-side-rendering/samples/attribute-dynamic/_expected.html
diff --git a/test/server-side-rendering/samples/attribute-escaped-quotes-spread/_expected.svelte b/test/server-side-rendering/samples/attribute-escaped-quotes-spread/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/attribute-escaped-quotes-spread/_expected.svelte
rename to test/server-side-rendering/samples/attribute-escaped-quotes-spread/_expected.html
diff --git a/test/server-side-rendering/samples/attribute-escaped-quotes/_expected.svelte b/test/server-side-rendering/samples/attribute-escaped-quotes/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/attribute-escaped-quotes/_expected.svelte
rename to test/server-side-rendering/samples/attribute-escaped-quotes/_expected.html
diff --git a/test/server-side-rendering/samples/attribute-static/_expected.svelte b/test/server-side-rendering/samples/attribute-static/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/attribute-static/_expected.svelte
rename to test/server-side-rendering/samples/attribute-static/_expected.html
diff --git a/test/server-side-rendering/samples/bindings/_expected.svelte b/test/server-side-rendering/samples/bindings/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/bindings/_expected.svelte
rename to test/server-side-rendering/samples/bindings/_expected.html
diff --git a/test/server-side-rendering/samples/comment/_expected.svelte b/test/server-side-rendering/samples/comment/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/comment/_expected.svelte
rename to test/server-side-rendering/samples/comment/_expected.html
diff --git a/test/server-side-rendering/samples/component-binding-renamed/_expected.svelte b/test/server-side-rendering/samples/component-binding-renamed/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/component-binding-renamed/_expected.svelte
rename to test/server-side-rendering/samples/component-binding-renamed/_expected.html
diff --git a/test/server-side-rendering/samples/component-binding/_expected.svelte b/test/server-side-rendering/samples/component-binding/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/component-binding/_expected.svelte
rename to test/server-side-rendering/samples/component-binding/_expected.html
diff --git a/test/server-side-rendering/samples/component-data-dynamic/_expected.svelte b/test/server-side-rendering/samples/component-data-dynamic/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/component-data-dynamic/_expected.svelte
rename to test/server-side-rendering/samples/component-data-dynamic/_expected.html
diff --git a/test/server-side-rendering/samples/component-data-empty/_expected.svelte b/test/server-side-rendering/samples/component-data-empty/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/component-data-empty/_expected.svelte
rename to test/server-side-rendering/samples/component-data-empty/_expected.html
diff --git a/test/server-side-rendering/samples/component-refs-and-attributes/_expected.svelte b/test/server-side-rendering/samples/component-refs-and-attributes/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/component-refs-and-attributes/_expected.svelte
rename to test/server-side-rendering/samples/component-refs-and-attributes/_expected.html
diff --git a/test/server-side-rendering/samples/component-refs/_expected.svelte b/test/server-side-rendering/samples/component-refs/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/component-refs/_expected.svelte
rename to test/server-side-rendering/samples/component-refs/_expected.html
diff --git a/test/server-side-rendering/samples/component-with-different-extension/_expected.svelte b/test/server-side-rendering/samples/component-with-different-extension/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/component-with-different-extension/_expected.svelte
rename to test/server-side-rendering/samples/component-with-different-extension/_expected.html
diff --git a/test/server-side-rendering/samples/component-yield/_expected.svelte b/test/server-side-rendering/samples/component-yield/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/component-yield/_expected.svelte
rename to test/server-side-rendering/samples/component-yield/_expected.html
diff --git a/test/server-side-rendering/samples/component/_expected.svelte b/test/server-side-rendering/samples/component/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/component/_expected.svelte
rename to test/server-side-rendering/samples/component/_expected.html
diff --git a/test/server-side-rendering/samples/computed/_expected.svelte b/test/server-side-rendering/samples/computed/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/computed/_expected.svelte
rename to test/server-side-rendering/samples/computed/_expected.html
diff --git a/test/server-side-rendering/samples/default-data-override/_expected.svelte b/test/server-side-rendering/samples/default-data-override/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/default-data-override/_expected.svelte
rename to test/server-side-rendering/samples/default-data-override/_expected.html
diff --git a/test/server-side-rendering/samples/default-data/_expected.svelte b/test/server-side-rendering/samples/default-data/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/default-data/_expected.svelte
rename to test/server-side-rendering/samples/default-data/_expected.html
diff --git a/test/server-side-rendering/samples/directives/_expected.svelte b/test/server-side-rendering/samples/directives/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/directives/_expected.svelte
rename to test/server-side-rendering/samples/directives/_expected.html
diff --git a/test/server-side-rendering/samples/dynamic-text-escaped/_expected.svelte b/test/server-side-rendering/samples/dynamic-text-escaped/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/dynamic-text-escaped/_expected.svelte
rename to test/server-side-rendering/samples/dynamic-text-escaped/_expected.html
diff --git a/test/server-side-rendering/samples/dynamic-text/_expected.svelte b/test/server-side-rendering/samples/dynamic-text/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/dynamic-text/_expected.svelte
rename to test/server-side-rendering/samples/dynamic-text/_expected.html
diff --git a/test/server-side-rendering/samples/each-block/_expected.svelte b/test/server-side-rendering/samples/each-block/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/each-block/_expected.svelte
rename to test/server-side-rendering/samples/each-block/_expected.html
diff --git a/test/server-side-rendering/samples/empty-elements-closed/_expected.svelte b/test/server-side-rendering/samples/empty-elements-closed/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/empty-elements-closed/_expected.svelte
rename to test/server-side-rendering/samples/empty-elements-closed/_expected.html
diff --git a/test/server-side-rendering/samples/entities/_expected.svelte b/test/server-side-rendering/samples/entities/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/entities/_expected.svelte
rename to test/server-side-rendering/samples/entities/_expected.html
diff --git a/test/server-side-rendering/samples/head-title/_expected-head.svelte b/test/server-side-rendering/samples/head-title/_expected-head.html
similarity index 100%
rename from test/server-side-rendering/samples/head-title/_expected-head.svelte
rename to test/server-side-rendering/samples/head-title/_expected-head.html
diff --git a/test/server-side-rendering/samples/head-title/_expected.svelte b/test/server-side-rendering/samples/head-title/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/head-title/_expected.svelte
rename to test/server-side-rendering/samples/head-title/_expected.html
diff --git a/test/server-side-rendering/samples/helpers/_expected.svelte b/test/server-side-rendering/samples/helpers/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/helpers/_expected.svelte
rename to test/server-side-rendering/samples/helpers/_expected.html
diff --git a/test/server-side-rendering/samples/if-block-false/_expected.svelte b/test/server-side-rendering/samples/if-block-false/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/if-block-false/_expected.svelte
rename to test/server-side-rendering/samples/if-block-false/_expected.html
diff --git a/test/server-side-rendering/samples/if-block-true/_expected.svelte b/test/server-side-rendering/samples/if-block-true/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/if-block-true/_expected.svelte
rename to test/server-side-rendering/samples/if-block-true/_expected.html
diff --git a/test/server-side-rendering/samples/import-non-component/_expected.svelte b/test/server-side-rendering/samples/import-non-component/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/import-non-component/_expected.svelte
rename to test/server-side-rendering/samples/import-non-component/_expected.html
diff --git a/test/server-side-rendering/samples/raw-mustaches/_expected.svelte b/test/server-side-rendering/samples/raw-mustaches/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/raw-mustaches/_expected.svelte
rename to test/server-side-rendering/samples/raw-mustaches/_expected.html
diff --git a/test/server-side-rendering/samples/sanitize-name/_expected.svelte b/test/server-side-rendering/samples/sanitize-name/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/sanitize-name/_expected.svelte
rename to test/server-side-rendering/samples/sanitize-name/_expected.html
diff --git a/test/server-side-rendering/samples/static-div/_expected.svelte b/test/server-side-rendering/samples/static-div/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/static-div/_expected.svelte
rename to test/server-side-rendering/samples/static-div/_expected.html
diff --git a/test/server-side-rendering/samples/static-text/_expected.svelte b/test/server-side-rendering/samples/static-text/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/static-text/_expected.svelte
rename to test/server-side-rendering/samples/static-text/_expected.html
diff --git a/test/server-side-rendering/samples/styles-nested/_expected.svelte b/test/server-side-rendering/samples/styles-nested/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/styles-nested/_expected.svelte
rename to test/server-side-rendering/samples/styles-nested/_expected.html
diff --git a/test/server-side-rendering/samples/styles/_expected.svelte b/test/server-side-rendering/samples/styles/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/styles/_expected.svelte
rename to test/server-side-rendering/samples/styles/_expected.html
diff --git a/test/server-side-rendering/samples/textarea-children/_expected.svelte b/test/server-side-rendering/samples/textarea-children/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/textarea-children/_expected.svelte
rename to test/server-side-rendering/samples/textarea-children/_expected.html
diff --git a/test/server-side-rendering/samples/textarea-value/_expected.svelte b/test/server-side-rendering/samples/textarea-value/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/textarea-value/_expected.svelte
rename to test/server-side-rendering/samples/textarea-value/_expected.html
diff --git a/test/server-side-rendering/samples/triple/_expected.svelte b/test/server-side-rendering/samples/triple/_expected.html
similarity index 100%
rename from test/server-side-rendering/samples/triple/_expected.svelte
rename to test/server-side-rendering/samples/triple/_expected.html
diff --git a/test/sourcemaps/index.js b/test/sourcemaps/index.js
index 7bdcaa7f41..79028719b9 100644
--- a/test/sourcemaps/index.js
+++ b/test/sourcemaps/index.js
@@ -21,7 +21,7 @@ describe("sourcemaps", () => {
 			const config = loadConfig(`./sourcemaps/samples/${dir}/_config.js`);
 
 			const filename = path.resolve(
-				`test/sourcemaps/samples/${dir}/input.html`
+				`test/sourcemaps/samples/${dir}/input.svelte`
 			);
 			const outputFilename = path.resolve(
 				`test/sourcemaps/samples/${dir}/output`
@@ -56,8 +56,8 @@ describe("sourcemaps", () => {
 				);
 			}
 
-			assert.deepEqual(js.map.sources, ["input.html"]);
-			if (css.map) assert.deepEqual(css.map.sources, ["input.html"]);
+			assert.deepEqual(js.map.sources, ["input.svelte"]);
+			if (css.map) assert.deepEqual(css.map.sources, ["input.svelte"]);
 
 			const { test } = require(`./samples/${dir}/test.js`);
 
diff --git a/test/sourcemaps/samples/basic/test.js b/test/sourcemaps/samples/basic/test.js
index f0680b7351..f13ff5d0e1 100644
--- a/test/sourcemaps/samples/basic/test.js
+++ b/test/sourcemaps/samples/basic/test.js
@@ -12,7 +12,7 @@ export function test({ assert, smc, locateInSource, locateInGenerated }) {
 	});
 
 	assert.deepEqual( actual, {
-		source: 'input.html',
+		source: 'input.svelte',
 		name: null,
 		line: expected.line + 1,
 		column: expected.column
@@ -26,7 +26,7 @@ export function test({ assert, smc, locateInSource, locateInGenerated }) {
 	});
 
 	assert.deepEqual( actual, {
-		source: 'input.html',
+		source: 'input.svelte',
 		name: null,
 		line: expected.line + 1,
 		column: expected.column
diff --git a/test/sourcemaps/samples/binding-shorthand.skip/test.js b/test/sourcemaps/samples/binding-shorthand.skip/test.js
index 8c2216ead5..cdfbbdc091 100644
--- a/test/sourcemaps/samples/binding-shorthand.skip/test.js
+++ b/test/sourcemaps/samples/binding-shorthand.skip/test.js
@@ -13,7 +13,7 @@ export function test({ assert, smc, locateInSource, locateInGenerated }) {
 	});
 
 	assert.deepEqual(actual, {
-		source: 'input.html',
+		source: 'input.svelte',
 		name: null,
 		line: expected.line + 1,
 		column: expected.column
diff --git a/test/sourcemaps/samples/binding/test.js b/test/sourcemaps/samples/binding/test.js
index a0750d89a1..31c0e98442 100644
--- a/test/sourcemaps/samples/binding/test.js
+++ b/test/sourcemaps/samples/binding/test.js
@@ -12,7 +12,7 @@ export function test({ assert, smc, locateInSource, locateInGenerated }) {
 	});
 
 	assert.deepEqual(actual, {
-		source: 'input.html',
+		source: 'input.svelte',
 		name: null,
 		line: expected.line + 1,
 		column: expected.column
@@ -26,7 +26,7 @@ export function test({ assert, smc, locateInSource, locateInGenerated }) {
 	});
 
 	assert.deepEqual(actual, {
-		source: 'input.html',
+		source: 'input.svelte',
 		name: null,
 		line: expected.line + 1,
 		column: expected.column
diff --git a/test/sourcemaps/samples/css/test.js b/test/sourcemaps/samples/css/test.js
index c1f55612eb..54082bd4ee 100644
--- a/test/sourcemaps/samples/css/test.js
+++ b/test/sourcemaps/samples/css/test.js
@@ -9,7 +9,7 @@ export function test({ assert, smcCss, locateInSource, locateInGeneratedCss }) {
 	});
 
 	assert.deepEqual( actual, {
-		source: 'input.html',
+		source: 'input.svelte',
 		name: null,
 		line: expected.line + 1,
 		column: expected.column
diff --git a/test/sourcemaps/samples/each-block/test.js b/test/sourcemaps/samples/each-block/test.js
index b0c1eb9583..6e9d2d70b0 100644
--- a/test/sourcemaps/samples/each-block/test.js
+++ b/test/sourcemaps/samples/each-block/test.js
@@ -10,7 +10,7 @@ export function test({ assert, code, smc, locateInSource, locateInGenerated }) {
 	});
 
 	assert.deepEqual( actual, {
-		source: 'input.html',
+		source: 'input.svelte',
 		name: null,
 		line: expected.line + 1,
 		column: expected.column
diff --git a/test/sourcemaps/samples/script/test.js b/test/sourcemaps/samples/script/test.js
index 87818fef09..73971ef487 100644
--- a/test/sourcemaps/samples/script/test.js
+++ b/test/sourcemaps/samples/script/test.js
@@ -8,7 +8,7 @@ export function test({ assert, smc, locateInSource, locateInGenerated }) {
 	});
 
 	assert.deepEqual( actual, {
-		source: 'input.html',
+		source: 'input.svelte',
 		name: null,
 		line: expected.line + 1,
 		column: expected.column
diff --git a/test/sourcemaps/samples/static-no-script/test.js b/test/sourcemaps/samples/static-no-script/test.js
index d4b66d9abc..a8f4d89ab8 100644
--- a/test/sourcemaps/samples/static-no-script/test.js
+++ b/test/sourcemaps/samples/static-no-script/test.js
@@ -2,8 +2,8 @@ const fs = require( 'fs' );
 const path = require( 'path' );
 
 export function test({ assert, map }) {
-	assert.deepEqual( map.sources, [ 'input.html' ]);
+	assert.deepEqual( map.sources, [ 'input.svelte' ]);
 	assert.deepEqual( map.sourcesContent, [
-		fs.readFileSync( path.join( __dirname, 'input.html' ), 'utf-8' )
+		fs.readFileSync( path.join( __dirname, 'input.svelte' ), 'utf-8' )
 	]);
 }
diff --git a/test/stats/index.js b/test/stats/index.js
index e0b114dd9a..fe4c2ac55b 100644
--- a/test/stats/index.js
+++ b/test/stats/index.js
@@ -16,7 +16,7 @@ describe('stats', () => {
 
 		(solo ? it.only : skip ? it.skip : it)(dir, () => {
 			const config = loadConfig(`./stats/samples/${dir}/_config.js`);
-			const filename = `test/stats/samples/${dir}/input.html`;
+			const filename = `test/stats/samples/${dir}/input.svelte`;
 			const input = fs.readFileSync(filename, 'utf-8').replace(/\s+$/, '');
 
 			const expectedWarnings =
diff --git a/test/validator/index.js b/test/validator/index.js
index 517427e817..f10024b86c 100644
--- a/test/validator/index.js
+++ b/test/validator/index.js
@@ -17,7 +17,7 @@ describe("validate", () => {
 		(solo ? it.only : skip ? it.skip : it)(dir, () => {
 			const config = loadConfig(`./validator/samples/${dir}/_config.js`);
 
-			const input = fs.readFileSync(`test/validator/samples/${dir}/input.html`, "utf-8").replace(/\s+$/, "");
+			const input = fs.readFileSync(`test/validator/samples/${dir}/input.svelte`, "utf-8").replace(/\s+$/, "");
 			const expectedWarnings = tryToLoadJson(`test/validator/samples/${dir}/warnings.json`) || [];
 			const expectedErrors = tryToLoadJson(`test/validator/samples/${dir}/errors.json`);
 
diff --git a/test/validator/samples/a11y-not-on-components/warnings.json b/test/validator/samples/a11y-not-on-components/warnings.json
index 7e17fda95a..4d8fb62182 100644
--- a/test/validator/samples/a11y-not-on-components/warnings.json
+++ b/test/validator/samples/a11y-not-on-components/warnings.json
@@ -5,13 +5,13 @@
 		"start": {
 			"column": 8,
 			"line": 6,
-			"character": 86
+			"character": 88
 		},
 		"end": {
 			"line": 6,
 			"column": 17,
-			"character": 95
+			"character": 97
 		},
-		"pos": 86
+		"pos": 88
 	}
 ]
diff --git a/test/validator/samples/action-on-component/errors.json b/test/validator/samples/action-on-component/errors.json
index 596ef16482..7ffaeb45fd 100644
--- a/test/validator/samples/action-on-component/errors.json
+++ b/test/validator/samples/action-on-component/errors.json
@@ -1,15 +1,15 @@
 [{
 	"code": "invalid-action",
 	"message": "Actions can only be applied to DOM elements, not components",
-	"pos": 84,
+	"pos": 86,
 	"start": {
 		"line": 7,
 		"column": 8,
-		"character": 84
+		"character": 86
 	},
 	"end": {
 		"line": 7,
 		"column": 15,
-		"character": 91
+		"character": 93
 	}
 }]
\ No newline at end of file
diff --git a/test/validator/samples/component-slot-dynamic-attribute/errors.json b/test/validator/samples/component-slot-dynamic-attribute/errors.json
index 6108b89bfb..8944f9cd3e 100644
--- a/test/validator/samples/component-slot-dynamic-attribute/errors.json
+++ b/test/validator/samples/component-slot-dynamic-attribute/errors.json
@@ -4,12 +4,12 @@
 	"start": {
 		"line": 6,
 		"column": 9,
-		"character": 75
+		"character": 77
 	},
 	"end": {
 		"line": 6,
 		"column": 19,
-		"character": 85
+		"character": 87
 	},
-	"pos": 75
+	"pos": 77
 }]
\ No newline at end of file
diff --git a/test/validator/samples/component-slotted-each-block/errors.json b/test/validator/samples/component-slotted-each-block/errors.json
index b2ae858fb6..89f394bca4 100644
--- a/test/validator/samples/component-slotted-each-block/errors.json
+++ b/test/validator/samples/component-slotted-each-block/errors.json
@@ -4,12 +4,12 @@
 	"start": {
 		"line": 7,
 		"column": 7,
-		"character": 98
+		"character": 100
 	},
 	"end": {
 		"line": 7,
 		"column": 17,
-		"character": 108
+		"character": 110
 	},
-	"pos": 98
+	"pos": 100
 }]
\ No newline at end of file
diff --git a/test/validator/samples/component-slotted-if-block/errors.json b/test/validator/samples/component-slotted-if-block/errors.json
index bd3ef87fad..ab35a77fce 100644
--- a/test/validator/samples/component-slotted-if-block/errors.json
+++ b/test/validator/samples/component-slotted-if-block/errors.json
@@ -4,12 +4,12 @@
 	"start": {
 		"line": 7,
 		"column": 7,
-		"character": 86
+		"character": 88
 	},
 	"end": {
 		"line": 7,
 		"column": 17,
-		"character": 96
+		"character": 98
 	},
-	"pos": 86
+	"pos": 88
 }]
\ No newline at end of file
diff --git a/test/validator/samples/prop-slot/errors.json b/test/validator/samples/prop-slot/errors.json
index 01e864b542..4fbfa3935c 100644
--- a/test/validator/samples/prop-slot/errors.json
+++ b/test/validator/samples/prop-slot/errors.json
@@ -4,12 +4,12 @@
 	"start": {
 		"line": 5,
 		"column": 8,
-		"character": 65
+		"character": 67
 	},
 	"end": {
 		"line": 5,
 		"column": 18,
-		"character": 75
+		"character": 77
 	},
-	"pos": 65
+	"pos": 67
 }]
diff --git a/test/validator/samples/transition-on-component/errors.json b/test/validator/samples/transition-on-component/errors.json
index bee8bf7539..400539f8e6 100644
--- a/test/validator/samples/transition-on-component/errors.json
+++ b/test/validator/samples/transition-on-component/errors.json
@@ -4,12 +4,12 @@
 	"start": {
 		"line": 7,
 		"column": 8,
-		"character": 85
+		"character": 87
 	},
 	"end": {
 		"line": 7,
 		"column": 14,
-		"character": 91
+		"character": 93
 	},
-	"pos": 85
+	"pos": 87
 }]
\ No newline at end of file

From e6ed8ef49fcc6e48e7a07a42cd502801b6c5845a Mon Sep 17 00:00:00 2001
From: Rich Harris <richard.a.harris@gmail.com>
Date: Fri, 8 Feb 2019 20:58:18 -0500
Subject: [PATCH 3/3] update site, including REPL, to use .svelte

---
 .../7guis-circles/{App.html => App.svelte}     |  0
 .../7guis-counter/{App.html => App.svelte}     |  0
 .../7guis-crud/{App.html => App.svelte}        |  0
 .../{App.html => App.svelte}                   |  0
 .../7guis-temperature/{App.html => App.svelte} |  0
 .../7guis-timer/{App.html => App.svelte}       |  0
 .../await-block/{App.html => App.svelte}       |  0
 .../bar-chart/{App.html => App.svelte}         |  0
 .../{App.html => App.svelte}                   |  0
 .../{App.html => App.svelte}                   |  0
 .../{App.html => App.svelte}                   |  0
 .../{App.html => App.svelte}                   |  0
 .../{App.html => App.svelte}                   |  0
 .../{App.html => App.svelte}                   |  0
 .../binding-textarea/{App.html => App.svelte}  |  0
 .../each-blocks/{App.html => App.svelte}       |  0
 .../hacker-news/{App.html => App.svelte}       |  4 ++--
 .../{Comment.html => Comment.svelte}           |  0
 .../hacker-news/{Item.html => Item.svelte}     |  0
 .../hacker-news/{List.html => List.svelte}     |  0
 .../{Summary.html => Summary.svelte}           |  0
 .../hello-world/{App.html => App.svelte}       |  0
 .../{App.html => App.svelte}                   |  0
 .../{App.html => App.svelte}                   |  0
 .../{App.html => App.svelte}                   |  2 +-
 .../{Foo.html => Foo.svelte}                   |  0
 .../{App.html => App.svelte}                   |  0
 .../if-blocks/{App.html => App.svelte}         |  0
 .../immutable/{App.html => App.svelte}         |  4 ++--
 ...ImmutableTodo.html => ImmutableTodo.svelte} |  0
 .../{MutableTodo.html => MutableTodo.svelte}   |  0
 .../line-chart/{App.html => App.svelte}        |  0
 .../modal-with-slot/{App.html => App.svelte}   |  2 +-
 .../{Modal.html => Modal.svelte}               |  0
 .../motion-spring/{App.html => App.svelte}     |  0
 .../nested-components/{App.html => App.svelte} |  2 +-
 .../{Nested.html => Nested.svelte}             |  0
 .../examples/parallax/{App.html => App.svelte} |  0
 .../scatterplot/{App.html => App.svelte}       |  2 +-
 .../{Scatterplot.html => Scatterplot.svelte}   |  0
 .../scoped-styles/{App.html => App.svelte}     |  0
 .../self-references/{App.html => App.svelte}   |  0
 .../svg-clock/{App.html => App.svelte}         |  0
 .../{App.html => App.svelte}                   |  0
 .../transitions-fade/{App.html => App.svelte}  |  0
 .../transitions-fly/{App.html => App.svelte}   |  0
 .../{App.html => App.svelte}                   |  0
 site/package-lock.json                         |  6 +++---
 site/package.json                              |  2 +-
 site/src/components/{Icon.html => Icon.svelte} |  0
 .../{InlineSvg.html => InlineSvg.svelte}       |  0
 site/src/components/{Logo.html => Logo.svelte} |  0
 .../components/{TopNav.html => TopNav.svelte}  |  4 ++--
 site/src/routes/{_error.html => _error.svelte} |  0
 .../routes/{_layout.html => _layout.svelte}    |  4 ++--
 site/src/routes/{about.html => about.svelte}   |  0
 site/src/routes/api/examples/[slug].js         |  8 ++++----
 .../routes/blog/{[slug].html => [slug].svelte} |  0
 .../routes/blog/{index.html => index.svelte}   |  0
 site/src/routes/gist/[id].js                   |  4 ++--
 ...uideContents.html => _GuideContents.svelte} |  2 +-
 site/src/routes/guide/_sections.js             |  2 +-
 .../routes/guide/{index.html => index.svelte}  |  4 ++--
 site/src/routes/{index.html => index.svelte}   |  4 ++--
 .../{UserMenu.html => UserMenu.svelte}         |  0
 .../AppControls/{index.html => index.svelte}   | 10 +++++-----
 .../{CodeMirror.html => CodeMirror.svelte}     |  0
 ...tSelector.html => ComponentSelector.svelte} |  8 ++++----
 .../{ModuleEditor.html => ModuleEditor.svelte} |  2 +-
 .../Input/{index.html => index.svelte}         |  4 ++--
 ...putToggle.html => InputOutputToggle.svelte} |  0
 ...ilerOptions.html => CompilerOptions.svelte} |  0
 .../{PropEditor.html => PropEditor.svelte}     |  2 +-
 .../Output/{Viewer.html => Viewer.svelte}      |  0
 .../Output/{index.html => index.svelte}        | 10 +++++-----
 .../_components/{Repl.html => Repl.svelte}     | 18 +++++++++---------
 .../{SplitPane.html => SplitPane.svelte}       |  0
 .../routes/repl/{embed.html => embed.svelte}   | 10 +++++-----
 .../routes/repl/{index.html => index.svelte}   | 17 ++++++++++-------
 site/static/workers/bundler.js                 | 10 ++++++----
 80 files changed, 76 insertions(+), 71 deletions(-)
 rename site/content/examples/7guis-circles/{App.html => App.svelte} (100%)
 rename site/content/examples/7guis-counter/{App.html => App.svelte} (100%)
 rename site/content/examples/7guis-crud/{App.html => App.svelte} (100%)
 rename site/content/examples/7guis-flight-booker/{App.html => App.svelte} (100%)
 rename site/content/examples/7guis-temperature/{App.html => App.svelte} (100%)
 rename site/content/examples/7guis-timer/{App.html => App.svelte} (100%)
 rename site/content/examples/await-block/{App.html => App.svelte} (100%)
 rename site/content/examples/bar-chart/{App.html => App.svelte} (100%)
 rename site/content/examples/binding-input-checkbox-group/{App.html => App.svelte} (100%)
 rename site/content/examples/binding-input-checkbox/{App.html => App.svelte} (100%)
 rename site/content/examples/binding-input-numeric/{App.html => App.svelte} (100%)
 rename site/content/examples/binding-input-radio/{App.html => App.svelte} (100%)
 rename site/content/examples/binding-input-text/{App.html => App.svelte} (100%)
 rename site/content/examples/binding-media-elements/{App.html => App.svelte} (100%)
 rename site/content/examples/binding-textarea/{App.html => App.svelte} (100%)
 rename site/content/examples/each-blocks/{App.html => App.svelte} (100%)
 rename site/content/examples/hacker-news/{App.html => App.svelte} (92%)
 rename site/content/examples/hacker-news/{Comment.html => Comment.svelte} (100%)
 rename site/content/examples/hacker-news/{Item.html => Item.svelte} (100%)
 rename site/content/examples/hacker-news/{List.html => List.svelte} (100%)
 rename site/content/examples/hacker-news/{Summary.html => Summary.svelte} (100%)
 rename site/content/examples/hello-world/{App.html => App.svelte} (100%)
 rename site/content/examples/homepage-demo-hello-world/{App.html => App.svelte} (100%)
 rename site/content/examples/homepage-demo-reactivity/{App.html => App.svelte} (100%)
 rename site/content/examples/homepage-demo-scoped-styles/{App.html => App.svelte} (73%)
 rename site/content/examples/homepage-demo-scoped-styles/{Foo.html => Foo.svelte} (100%)
 rename site/content/examples/homepage-demo-transitions/{App.html => App.svelte} (100%)
 rename site/content/examples/if-blocks/{App.html => App.svelte} (100%)
 rename site/content/examples/immutable/{App.html => App.svelte} (86%)
 rename site/content/examples/immutable/{ImmutableTodo.html => ImmutableTodo.svelte} (100%)
 rename site/content/examples/immutable/{MutableTodo.html => MutableTodo.svelte} (100%)
 rename site/content/examples/line-chart/{App.html => App.svelte} (100%)
 rename site/content/examples/modal-with-slot/{App.html => App.svelte} (95%)
 rename site/content/examples/modal-with-slot/{Modal.html => Modal.svelte} (100%)
 rename site/content/examples/motion-spring/{App.html => App.svelte} (100%)
 rename site/content/examples/nested-components/{App.html => App.svelte} (53%)
 rename site/content/examples/nested-components/{Nested.html => Nested.svelte} (100%)
 rename site/content/examples/parallax/{App.html => App.svelte} (100%)
 rename site/content/examples/scatterplot/{App.html => App.svelte} (87%)
 rename site/content/examples/scatterplot/{Scatterplot.html => Scatterplot.svelte} (100%)
 rename site/content/examples/scoped-styles/{App.html => App.svelte} (100%)
 rename site/content/examples/self-references/{App.html => App.svelte} (100%)
 rename site/content/examples/svg-clock/{App.html => App.svelte} (100%)
 rename site/content/examples/transitions-custom/{App.html => App.svelte} (100%)
 rename site/content/examples/transitions-fade/{App.html => App.svelte} (100%)
 rename site/content/examples/transitions-fly/{App.html => App.svelte} (100%)
 rename site/content/examples/transitions-in-out/{App.html => App.svelte} (100%)
 rename site/src/components/{Icon.html => Icon.svelte} (100%)
 rename site/src/components/{InlineSvg.html => InlineSvg.svelte} (100%)
 rename site/src/components/{Logo.html => Logo.svelte} (100%)
 rename site/src/components/{TopNav.html => TopNav.svelte} (98%)
 rename site/src/routes/{_error.html => _error.svelte} (100%)
 rename site/src/routes/{_layout.html => _layout.svelte} (76%)
 rename site/src/routes/{about.html => about.svelte} (100%)
 rename site/src/routes/blog/{[slug].html => [slug].svelte} (100%)
 rename site/src/routes/blog/{index.html => index.svelte} (100%)
 rename site/src/routes/guide/{_GuideContents.html => _GuideContents.svelte} (98%)
 rename site/src/routes/guide/{index.html => index.svelte} (98%)
 rename site/src/routes/{index.html => index.svelte} (98%)
 rename site/src/routes/repl/_components/AppControls/{UserMenu.html => UserMenu.svelte} (100%)
 rename site/src/routes/repl/_components/AppControls/{index.html => index.svelte} (96%)
 rename site/src/routes/repl/_components/{CodeMirror.html => CodeMirror.svelte} (100%)
 rename site/src/routes/repl/_components/Input/{ComponentSelector.html => ComponentSelector.svelte} (96%)
 rename site/src/routes/repl/_components/Input/{ModuleEditor.html => ModuleEditor.svelte} (91%)
 rename site/src/routes/repl/_components/Input/{index.html => index.svelte} (77%)
 rename site/src/routes/repl/_components/{InputOutputToggle.html => InputOutputToggle.svelte} (100%)
 rename site/src/routes/repl/_components/Output/{CompilerOptions.html => CompilerOptions.svelte} (100%)
 rename site/src/routes/repl/_components/Output/{PropEditor.html => PropEditor.svelte} (95%)
 rename site/src/routes/repl/_components/Output/{Viewer.html => Viewer.svelte} (100%)
 rename site/src/routes/repl/_components/Output/{index.html => index.svelte} (94%)
 rename site/src/routes/repl/_components/{Repl.html => Repl.svelte} (94%)
 rename site/src/routes/repl/_components/{SplitPane.html => SplitPane.svelte} (100%)
 rename site/src/routes/repl/{embed.html => embed.svelte} (87%)
 rename site/src/routes/repl/{index.html => index.svelte} (89%)

diff --git a/site/content/examples/7guis-circles/App.html b/site/content/examples/7guis-circles/App.svelte
similarity index 100%
rename from site/content/examples/7guis-circles/App.html
rename to site/content/examples/7guis-circles/App.svelte
diff --git a/site/content/examples/7guis-counter/App.html b/site/content/examples/7guis-counter/App.svelte
similarity index 100%
rename from site/content/examples/7guis-counter/App.html
rename to site/content/examples/7guis-counter/App.svelte
diff --git a/site/content/examples/7guis-crud/App.html b/site/content/examples/7guis-crud/App.svelte
similarity index 100%
rename from site/content/examples/7guis-crud/App.html
rename to site/content/examples/7guis-crud/App.svelte
diff --git a/site/content/examples/7guis-flight-booker/App.html b/site/content/examples/7guis-flight-booker/App.svelte
similarity index 100%
rename from site/content/examples/7guis-flight-booker/App.html
rename to site/content/examples/7guis-flight-booker/App.svelte
diff --git a/site/content/examples/7guis-temperature/App.html b/site/content/examples/7guis-temperature/App.svelte
similarity index 100%
rename from site/content/examples/7guis-temperature/App.html
rename to site/content/examples/7guis-temperature/App.svelte
diff --git a/site/content/examples/7guis-timer/App.html b/site/content/examples/7guis-timer/App.svelte
similarity index 100%
rename from site/content/examples/7guis-timer/App.html
rename to site/content/examples/7guis-timer/App.svelte
diff --git a/site/content/examples/await-block/App.html b/site/content/examples/await-block/App.svelte
similarity index 100%
rename from site/content/examples/await-block/App.html
rename to site/content/examples/await-block/App.svelte
diff --git a/site/content/examples/bar-chart/App.html b/site/content/examples/bar-chart/App.svelte
similarity index 100%
rename from site/content/examples/bar-chart/App.html
rename to site/content/examples/bar-chart/App.svelte
diff --git a/site/content/examples/binding-input-checkbox-group/App.html b/site/content/examples/binding-input-checkbox-group/App.svelte
similarity index 100%
rename from site/content/examples/binding-input-checkbox-group/App.html
rename to site/content/examples/binding-input-checkbox-group/App.svelte
diff --git a/site/content/examples/binding-input-checkbox/App.html b/site/content/examples/binding-input-checkbox/App.svelte
similarity index 100%
rename from site/content/examples/binding-input-checkbox/App.html
rename to site/content/examples/binding-input-checkbox/App.svelte
diff --git a/site/content/examples/binding-input-numeric/App.html b/site/content/examples/binding-input-numeric/App.svelte
similarity index 100%
rename from site/content/examples/binding-input-numeric/App.html
rename to site/content/examples/binding-input-numeric/App.svelte
diff --git a/site/content/examples/binding-input-radio/App.html b/site/content/examples/binding-input-radio/App.svelte
similarity index 100%
rename from site/content/examples/binding-input-radio/App.html
rename to site/content/examples/binding-input-radio/App.svelte
diff --git a/site/content/examples/binding-input-text/App.html b/site/content/examples/binding-input-text/App.svelte
similarity index 100%
rename from site/content/examples/binding-input-text/App.html
rename to site/content/examples/binding-input-text/App.svelte
diff --git a/site/content/examples/binding-media-elements/App.html b/site/content/examples/binding-media-elements/App.svelte
similarity index 100%
rename from site/content/examples/binding-media-elements/App.html
rename to site/content/examples/binding-media-elements/App.svelte
diff --git a/site/content/examples/binding-textarea/App.html b/site/content/examples/binding-textarea/App.svelte
similarity index 100%
rename from site/content/examples/binding-textarea/App.html
rename to site/content/examples/binding-textarea/App.svelte
diff --git a/site/content/examples/each-blocks/App.html b/site/content/examples/each-blocks/App.svelte
similarity index 100%
rename from site/content/examples/each-blocks/App.html
rename to site/content/examples/each-blocks/App.svelte
diff --git a/site/content/examples/hacker-news/App.html b/site/content/examples/hacker-news/App.svelte
similarity index 92%
rename from site/content/examples/hacker-news/App.html
rename to site/content/examples/hacker-news/App.svelte
index 2f8283fdf2..68ba61d6dc 100644
--- a/site/content/examples/hacker-news/App.html
+++ b/site/content/examples/hacker-news/App.svelte
@@ -1,7 +1,7 @@
 <script>
 	import { onMount } from 'svelte';
-	import List from './List.html';
-	import Item from './Item.html';
+	import List from './List.svelte';
+	import Item from './Item.svelte';
 
 	let item;
 	let page;
diff --git a/site/content/examples/hacker-news/Comment.html b/site/content/examples/hacker-news/Comment.svelte
similarity index 100%
rename from site/content/examples/hacker-news/Comment.html
rename to site/content/examples/hacker-news/Comment.svelte
diff --git a/site/content/examples/hacker-news/Item.html b/site/content/examples/hacker-news/Item.svelte
similarity index 100%
rename from site/content/examples/hacker-news/Item.html
rename to site/content/examples/hacker-news/Item.svelte
diff --git a/site/content/examples/hacker-news/List.html b/site/content/examples/hacker-news/List.svelte
similarity index 100%
rename from site/content/examples/hacker-news/List.html
rename to site/content/examples/hacker-news/List.svelte
diff --git a/site/content/examples/hacker-news/Summary.html b/site/content/examples/hacker-news/Summary.svelte
similarity index 100%
rename from site/content/examples/hacker-news/Summary.html
rename to site/content/examples/hacker-news/Summary.svelte
diff --git a/site/content/examples/hello-world/App.html b/site/content/examples/hello-world/App.svelte
similarity index 100%
rename from site/content/examples/hello-world/App.html
rename to site/content/examples/hello-world/App.svelte
diff --git a/site/content/examples/homepage-demo-hello-world/App.html b/site/content/examples/homepage-demo-hello-world/App.svelte
similarity index 100%
rename from site/content/examples/homepage-demo-hello-world/App.html
rename to site/content/examples/homepage-demo-hello-world/App.svelte
diff --git a/site/content/examples/homepage-demo-reactivity/App.html b/site/content/examples/homepage-demo-reactivity/App.svelte
similarity index 100%
rename from site/content/examples/homepage-demo-reactivity/App.html
rename to site/content/examples/homepage-demo-reactivity/App.svelte
diff --git a/site/content/examples/homepage-demo-scoped-styles/App.html b/site/content/examples/homepage-demo-scoped-styles/App.svelte
similarity index 73%
rename from site/content/examples/homepage-demo-scoped-styles/App.html
rename to site/content/examples/homepage-demo-scoped-styles/App.svelte
index 7a372268d1..b1fe0495a9 100644
--- a/site/content/examples/homepage-demo-scoped-styles/App.html
+++ b/site/content/examples/homepage-demo-scoped-styles/App.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Foo from './Foo.html';
+	import Foo from './Foo.svelte';
 </script>
 
 <style>
diff --git a/site/content/examples/homepage-demo-scoped-styles/Foo.html b/site/content/examples/homepage-demo-scoped-styles/Foo.svelte
similarity index 100%
rename from site/content/examples/homepage-demo-scoped-styles/Foo.html
rename to site/content/examples/homepage-demo-scoped-styles/Foo.svelte
diff --git a/site/content/examples/homepage-demo-transitions/App.html b/site/content/examples/homepage-demo-transitions/App.svelte
similarity index 100%
rename from site/content/examples/homepage-demo-transitions/App.html
rename to site/content/examples/homepage-demo-transitions/App.svelte
diff --git a/site/content/examples/if-blocks/App.html b/site/content/examples/if-blocks/App.svelte
similarity index 100%
rename from site/content/examples/if-blocks/App.html
rename to site/content/examples/if-blocks/App.svelte
diff --git a/site/content/examples/immutable/App.html b/site/content/examples/immutable/App.svelte
similarity index 86%
rename from site/content/examples/immutable/App.html
rename to site/content/examples/immutable/App.svelte
index b5d78a165a..8cfc14aacb 100644
--- a/site/content/examples/immutable/App.html
+++ b/site/content/examples/immutable/App.svelte
@@ -1,8 +1,8 @@
 <svelte:options immutable/>
 
 <script>
-	import ImmutableTodo from './ImmutableTodo.html';
-	import MutableTodo from './MutableTodo.html';
+	import ImmutableTodo from './ImmutableTodo.svelte';
+	import MutableTodo from './MutableTodo.svelte';
 
 	export let todos;
 
diff --git a/site/content/examples/immutable/ImmutableTodo.html b/site/content/examples/immutable/ImmutableTodo.svelte
similarity index 100%
rename from site/content/examples/immutable/ImmutableTodo.html
rename to site/content/examples/immutable/ImmutableTodo.svelte
diff --git a/site/content/examples/immutable/MutableTodo.html b/site/content/examples/immutable/MutableTodo.svelte
similarity index 100%
rename from site/content/examples/immutable/MutableTodo.html
rename to site/content/examples/immutable/MutableTodo.svelte
diff --git a/site/content/examples/line-chart/App.html b/site/content/examples/line-chart/App.svelte
similarity index 100%
rename from site/content/examples/line-chart/App.html
rename to site/content/examples/line-chart/App.svelte
diff --git a/site/content/examples/modal-with-slot/App.html b/site/content/examples/modal-with-slot/App.svelte
similarity index 95%
rename from site/content/examples/modal-with-slot/App.html
rename to site/content/examples/modal-with-slot/App.svelte
index 621dfdd203..665a89554e 100644
--- a/site/content/examples/modal-with-slot/App.html
+++ b/site/content/examples/modal-with-slot/App.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Modal from './Modal.html';
+	import Modal from './Modal.svelte';
 
 	export let showModal;
 </script>
diff --git a/site/content/examples/modal-with-slot/Modal.html b/site/content/examples/modal-with-slot/Modal.svelte
similarity index 100%
rename from site/content/examples/modal-with-slot/Modal.html
rename to site/content/examples/modal-with-slot/Modal.svelte
diff --git a/site/content/examples/motion-spring/App.html b/site/content/examples/motion-spring/App.svelte
similarity index 100%
rename from site/content/examples/motion-spring/App.html
rename to site/content/examples/motion-spring/App.svelte
diff --git a/site/content/examples/nested-components/App.html b/site/content/examples/nested-components/App.svelte
similarity index 53%
rename from site/content/examples/nested-components/App.html
rename to site/content/examples/nested-components/App.svelte
index a00cb18a41..83cc0c6eb5 100644
--- a/site/content/examples/nested-components/App.html
+++ b/site/content/examples/nested-components/App.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Nested from './Nested.html';
+	import Nested from './Nested.svelte';
 </script>
 
 <p>This is a top-level element.</p>
diff --git a/site/content/examples/nested-components/Nested.html b/site/content/examples/nested-components/Nested.svelte
similarity index 100%
rename from site/content/examples/nested-components/Nested.html
rename to site/content/examples/nested-components/Nested.svelte
diff --git a/site/content/examples/parallax/App.html b/site/content/examples/parallax/App.svelte
similarity index 100%
rename from site/content/examples/parallax/App.html
rename to site/content/examples/parallax/App.svelte
diff --git a/site/content/examples/scatterplot/App.html b/site/content/examples/scatterplot/App.svelte
similarity index 87%
rename from site/content/examples/scatterplot/App.html
rename to site/content/examples/scatterplot/App.svelte
index e45d6f8f7f..8e88532ab5 100644
--- a/site/content/examples/scatterplot/App.html
+++ b/site/content/examples/scatterplot/App.svelte
@@ -1,5 +1,5 @@
 <script>
-	import Scatterplot from './Scatterplot.html';
+	import Scatterplot from './Scatterplot.svelte';
 
 	export let a;
 	export let b;
diff --git a/site/content/examples/scatterplot/Scatterplot.html b/site/content/examples/scatterplot/Scatterplot.svelte
similarity index 100%
rename from site/content/examples/scatterplot/Scatterplot.html
rename to site/content/examples/scatterplot/Scatterplot.svelte
diff --git a/site/content/examples/scoped-styles/App.html b/site/content/examples/scoped-styles/App.svelte
similarity index 100%
rename from site/content/examples/scoped-styles/App.html
rename to site/content/examples/scoped-styles/App.svelte
diff --git a/site/content/examples/self-references/App.html b/site/content/examples/self-references/App.svelte
similarity index 100%
rename from site/content/examples/self-references/App.html
rename to site/content/examples/self-references/App.svelte
diff --git a/site/content/examples/svg-clock/App.html b/site/content/examples/svg-clock/App.svelte
similarity index 100%
rename from site/content/examples/svg-clock/App.html
rename to site/content/examples/svg-clock/App.svelte
diff --git a/site/content/examples/transitions-custom/App.html b/site/content/examples/transitions-custom/App.svelte
similarity index 100%
rename from site/content/examples/transitions-custom/App.html
rename to site/content/examples/transitions-custom/App.svelte
diff --git a/site/content/examples/transitions-fade/App.html b/site/content/examples/transitions-fade/App.svelte
similarity index 100%
rename from site/content/examples/transitions-fade/App.html
rename to site/content/examples/transitions-fade/App.svelte
diff --git a/site/content/examples/transitions-fly/App.html b/site/content/examples/transitions-fly/App.svelte
similarity index 100%
rename from site/content/examples/transitions-fly/App.html
rename to site/content/examples/transitions-fly/App.svelte
diff --git a/site/content/examples/transitions-in-out/App.html b/site/content/examples/transitions-in-out/App.svelte
similarity index 100%
rename from site/content/examples/transitions-in-out/App.html
rename to site/content/examples/transitions-in-out/App.svelte
diff --git a/site/package-lock.json b/site/package-lock.json
index 796100e415..03fc1502d1 100644
--- a/site/package-lock.json
+++ b/site/package-lock.json
@@ -4255,9 +4255,9 @@
       }
     },
     "sapper": {
-      "version": "0.26.0-alpha.5",
-      "resolved": "https://registry.npmjs.org/sapper/-/sapper-0.26.0-alpha.5.tgz",
-      "integrity": "sha512-BpPfj4XzwHzRiY02haE0f/gxl7+p48CKrSsHYrsrkOgtVjjQ6VSuYIYZdgWlXHUeLEQQxxPVEQ+O+oPVtNJxGg==",
+      "version": "0.26.0-alpha.7",
+      "resolved": "https://registry.npmjs.org/sapper/-/sapper-0.26.0-alpha.7.tgz",
+      "integrity": "sha512-r89JjBMGv5f5641yklK6qwwJ2ZMRUQiOX7EaWRpBEW66UHFHPXXygSvYsa+Se9LbLF626NDh2EDbCPyjIaMSvw==",
       "dev": true,
       "requires": {
         "html-minifier": "^3.5.21",
diff --git a/site/package.json b/site/package.json
index e636f0d88a..dfd0a85d3b 100644
--- a/site/package.json
+++ b/site/package.json
@@ -52,7 +52,7 @@
     "rollup-plugin-replace": "^2.1.0",
     "rollup-plugin-svelte": "^5.0.1",
     "rollup-plugin-terser": "^4.0.4",
-    "sapper": "^0.26.0-alpha.5",
+    "sapper": "^0.26.0-alpha.7",
     "svelte": "^3.0.0-beta.3"
   }
 }
diff --git a/site/src/components/Icon.html b/site/src/components/Icon.svelte
similarity index 100%
rename from site/src/components/Icon.html
rename to site/src/components/Icon.svelte
diff --git a/site/src/components/InlineSvg.html b/site/src/components/InlineSvg.svelte
similarity index 100%
rename from site/src/components/InlineSvg.html
rename to site/src/components/InlineSvg.svelte
diff --git a/site/src/components/Logo.html b/site/src/components/Logo.svelte
similarity index 100%
rename from site/src/components/Logo.html
rename to site/src/components/Logo.svelte
diff --git a/site/src/components/TopNav.html b/site/src/components/TopNav.svelte
similarity index 98%
rename from site/src/components/TopNav.html
rename to site/src/components/TopNav.svelte
index 831ca598fd..c9945b912b 100644
--- a/site/src/components/TopNav.html
+++ b/site/src/components/TopNav.svelte
@@ -1,7 +1,7 @@
 <script>
 	import { onMount } from 'svelte';
-	import Icon from './Icon.html';
-	import Logo from './Logo.html';
+	import Icon from './Icon.svelte';
+	import Logo from './Logo.svelte';
 
 	export let segment;
 
diff --git a/site/src/routes/_error.html b/site/src/routes/_error.svelte
similarity index 100%
rename from site/src/routes/_error.html
rename to site/src/routes/_error.svelte
diff --git a/site/src/routes/_layout.html b/site/src/routes/_layout.svelte
similarity index 76%
rename from site/src/routes/_layout.html
rename to site/src/routes/_layout.svelte
index 4093237670..b9cc668e95 100644
--- a/site/src/routes/_layout.html
+++ b/site/src/routes/_layout.svelte
@@ -1,6 +1,6 @@
 <script>
-	import InlineSvg from '../components/InlineSvg.html';
-	import Nav from '../components/TopNav.html';
+	import InlineSvg from '../components/InlineSvg.svelte';
+	import Nav from '../components/TopNav.svelte';
 
 	export let child;
 	export let path;
diff --git a/site/src/routes/about.html b/site/src/routes/about.svelte
similarity index 100%
rename from site/src/routes/about.html
rename to site/src/routes/about.svelte
diff --git a/site/src/routes/api/examples/[slug].js b/site/src/routes/api/examples/[slug].js
index 221475b6b2..03bf723766 100644
--- a/site/src/routes/api/examples/[slug].js
+++ b/site/src/routes/api/examples/[slug].js
@@ -19,7 +19,7 @@ function createExample(slug) {
 	const components = files
 		.map(file => {
 			const ext = path.extname(file);
-			if (ext !== '.html' && ext !== '.js') return null;
+			if (ext !== '.svelte' && ext !== '.js') return null;
 
 			const source = fs.readFileSync(`content/examples/${slug}/${file}`, 'utf-8');
 
@@ -31,10 +31,10 @@ function createExample(slug) {
 		})
 		.filter(Boolean)
 		.sort((a, b) => {
-			if (a.name === 'App' && a.type === 'html') return -1;
-			if (b.name === 'App' && b.type === 'html') return 1;
+			if (a.name === 'App' && a.type === 'svelte') return -1;
+			if (b.name === 'App' && b.type === 'svelte') return 1;
 
-			if (a.type !== b.type) return a.type === 'html' ? -1 : 1;
+			if (a.type !== b.type) return a.type === 'svelte' ? -1 : 1;
 
 			return a.name < b.name ? -1 : 1;
 		});
diff --git a/site/src/routes/blog/[slug].html b/site/src/routes/blog/[slug].svelte
similarity index 100%
rename from site/src/routes/blog/[slug].html
rename to site/src/routes/blog/[slug].svelte
diff --git a/site/src/routes/blog/index.html b/site/src/routes/blog/index.svelte
similarity index 100%
rename from site/src/routes/blog/index.html
rename to site/src/routes/blog/index.svelte
diff --git a/site/src/routes/gist/[id].js b/site/src/routes/gist/[id].js
index e20acac018..a03302fb8d 100644
--- a/site/src/routes/gist/[id].js
+++ b/site/src/routes/gist/[id].js
@@ -5,7 +5,7 @@ export async function get(req, res) {
 	const { id } = req.params;
 
 	const headers = {};
-	const user = req.session.passport && req.session.passport.user;
+	const user = req.session && req.session.passport && req.session.passport.user;
 	if (user) {
 		headers.Authorization = `token ${user.token}`;
 	}
@@ -34,7 +34,7 @@ export async function get(req, res) {
 }
 
 export async function patch(req, res) {
-	const user = req.session.passport && req.session.passport.user;
+	const user = req.session && req.session.passport && req.session.passport.user;
 
 	if (!user) {
 		res.writeHead(403, {
diff --git a/site/src/routes/guide/_GuideContents.html b/site/src/routes/guide/_GuideContents.svelte
similarity index 98%
rename from site/src/routes/guide/_GuideContents.html
rename to site/src/routes/guide/_GuideContents.svelte
index ff6fa60813..4c703f6af1 100644
--- a/site/src/routes/guide/_GuideContents.html
+++ b/site/src/routes/guide/_GuideContents.svelte
@@ -1,6 +1,6 @@
 <script>
 	import { onMount, afterUpdate } from 'svelte';
-	import Icon from '../../components/Icon.html';
+	import Icon from '../../components/Icon.svelte';
 
 	export let sections = [];
 	export let active_section = null;
diff --git a/site/src/routes/guide/_sections.js b/site/src/routes/guide/_sections.js
index 6b282115d3..59818bc464 100644
--- a/site/src/routes/guide/_sections.js
+++ b/site/src/routes/guide/_sections.js
@@ -113,7 +113,7 @@ export default function() {
 
 				if (meta) {
 					source = lines.slice(1).join('\n');
-					const filename = meta.filename || (lang === 'html' && 'App.html');
+					const filename = meta.filename || (lang === 'html' && 'App.svelte');
 					if (filename) {
 						prefix = `<span class='filename'>${prefix} ${filename}</span>`;
 						className += ' named';
diff --git a/site/src/routes/guide/index.html b/site/src/routes/guide/index.svelte
similarity index 98%
rename from site/src/routes/guide/index.html
rename to site/src/routes/guide/index.svelte
index f448be7c8b..3f4731cc11 100644
--- a/site/src/routes/guide/index.html
+++ b/site/src/routes/guide/index.svelte
@@ -7,8 +7,8 @@
 
 <script>
 	import { onMount, afterUpdate } from 'svelte';
-	import GuideContents from './_GuideContents.html';
-	import Icon from '../../components/Icon.html';
+	import GuideContents from './_GuideContents.svelte';
+	import Icon from '../../components/Icon.svelte';
 
 	export let sections;
 	let active_section;
diff --git a/site/src/routes/index.html b/site/src/routes/index.svelte
similarity index 98%
rename from site/src/routes/index.html
rename to site/src/routes/index.svelte
index 94f0f07147..75488610a6 100644
--- a/site/src/routes/index.html
+++ b/site/src/routes/index.svelte
@@ -1,6 +1,6 @@
 <script>
-	import Icon from '../components/Icon.html';
-	import Logo from '../components/Logo.html';
+	import Icon from '../components/Icon.svelte';
+	import Logo from '../components/Logo.svelte';
 	import contributors from './_contributors.js';
 
 	let sy = 0;
diff --git a/site/src/routes/repl/_components/AppControls/UserMenu.html b/site/src/routes/repl/_components/AppControls/UserMenu.svelte
similarity index 100%
rename from site/src/routes/repl/_components/AppControls/UserMenu.html
rename to site/src/routes/repl/_components/AppControls/UserMenu.svelte
diff --git a/site/src/routes/repl/_components/AppControls/index.html b/site/src/routes/repl/_components/AppControls/index.svelte
similarity index 96%
rename from site/src/routes/repl/_components/AppControls/index.html
rename to site/src/routes/repl/_components/AppControls/index.svelte
index 918dbd8e57..af4a0cf2e8 100644
--- a/site/src/routes/repl/_components/AppControls/index.html
+++ b/site/src/routes/repl/_components/AppControls/index.svelte
@@ -1,8 +1,8 @@
 <script>
 	import * as fleece from 'golden-fleece';
 	import { createEventDispatcher } from 'svelte';
-	import UserMenu from './UserMenu.html';
-	import Icon from '../../../../components/Icon.html';
+	import UserMenu from './UserMenu.svelte';
+	import Icon from '../../../../components/Icon.svelte';
 	import * as doNotZip from 'do-not-zip';
 	import downloadBlob from '../../_utils/downloadBlob.js';
 	import { user } from '../../../../user.js';
@@ -115,7 +115,7 @@
 			// null out any deleted files
 			const set = new Set(components.map(m => `${m.name}.${m.type}`));
 			Object.keys(gist.files).forEach(file => {
-				if (/\.(html|js)$/.test(file)) {
+				if (/\.(svelte|html|js)$/.test(file)) {
 					if (!set.has(file)) files[file] = null;
 				}
 			});
@@ -126,7 +126,7 @@
 					throw new Error(`GitHub does not allow saving gists with empty files - ${file}`);
 				}
 
-				if (!gist.files[files] || module.source !== gist.files[file].content) {
+				if (!gist.files[file] || module.source !== gist.files[file].content) {
 					files[file] = { content: module.source };
 				}
 			});
@@ -189,7 +189,7 @@
 
 		files.push(...components.map(component => ({ path: `src/${component.name}.${component.type}`, data: component.source })));
 		files.push({
-			path: `src/main.js`, data: `import App from './App.html';
+			path: `src/main.js`, data: `import App from './App.svelte';
 
 var app = new App({
 	target: document.body,
diff --git a/site/src/routes/repl/_components/CodeMirror.html b/site/src/routes/repl/_components/CodeMirror.svelte
similarity index 100%
rename from site/src/routes/repl/_components/CodeMirror.html
rename to site/src/routes/repl/_components/CodeMirror.svelte
diff --git a/site/src/routes/repl/_components/Input/ComponentSelector.html b/site/src/routes/repl/_components/Input/ComponentSelector.svelte
similarity index 96%
rename from site/src/routes/repl/_components/Input/ComponentSelector.html
rename to site/src/routes/repl/_components/Input/ComponentSelector.svelte
index e05c58e602..bde0a280e5 100644
--- a/site/src/routes/repl/_components/Input/ComponentSelector.html
+++ b/site/src/routes/repl/_components/Input/ComponentSelector.svelte
@@ -1,6 +1,6 @@
 <script>
 	import { createEventDispatcher } from 'svelte';
-	import Icon from '../../../../components/Icon.html';
+	import Icon from '../../../../components/Icon.svelte';
 	import { enter } from '../events.js';
 
 	const dispatch = createEventDispatcher();
@@ -25,7 +25,7 @@
 	}
 
 	function closeEdit() {
-		const match = /(.+)\.(html|js)$/.exec($selected_store.name);
+		const match = /(.+)\.(svelte|js)$/.exec($selected_store.name);
 		$selected_store.name = match ? match[1] : $selected_store.name;
 		if (match && match[2]) $selected_store.type = match[2];
 		editing = null;
@@ -49,7 +49,7 @@
 	function addNew() {
 		const component = {
 			name: uid++ ? `Component${uid}` : 'Component1',
-			type: 'html',
+			type: 'svelte',
 			source: ''
 		};
 
@@ -181,7 +181,7 @@
 			>
 				{#if component.name == 'App'}
 					<div class="uneditable">
-						App.html
+						App.svelte
 					</div>
 				{:else}
 					{#if component === editing}
diff --git a/site/src/routes/repl/_components/Input/ModuleEditor.html b/site/src/routes/repl/_components/Input/ModuleEditor.svelte
similarity index 91%
rename from site/src/routes/repl/_components/Input/ModuleEditor.html
rename to site/src/routes/repl/_components/Input/ModuleEditor.svelte
index c45c86202b..1b72f3aa31 100644
--- a/site/src/routes/repl/_components/Input/ModuleEditor.html
+++ b/site/src/routes/repl/_components/Input/ModuleEditor.svelte
@@ -1,5 +1,5 @@
 <script>
-	import CodeMirror from '../CodeMirror.html';
+	import CodeMirror from '../CodeMirror.svelte';
 
 	export let component;
 	export let error;
diff --git a/site/src/routes/repl/_components/Input/index.html b/site/src/routes/repl/_components/Input/index.svelte
similarity index 77%
rename from site/src/routes/repl/_components/Input/index.html
rename to site/src/routes/repl/_components/Input/index.svelte
index 50460af098..d858257b3d 100644
--- a/site/src/routes/repl/_components/Input/index.html
+++ b/site/src/routes/repl/_components/Input/index.svelte
@@ -1,6 +1,6 @@
 <script>
-	import ComponentSelector from './ComponentSelector.html';
-	import ModuleEditor from './ModuleEditor.html';
+	import ComponentSelector from './ComponentSelector.svelte';
+	import ModuleEditor from './ModuleEditor.svelte';
 
 	export let component_store;
 	export let selected_store;
diff --git a/site/src/routes/repl/_components/InputOutputToggle.html b/site/src/routes/repl/_components/InputOutputToggle.svelte
similarity index 100%
rename from site/src/routes/repl/_components/InputOutputToggle.html
rename to site/src/routes/repl/_components/InputOutputToggle.svelte
diff --git a/site/src/routes/repl/_components/Output/CompilerOptions.html b/site/src/routes/repl/_components/Output/CompilerOptions.svelte
similarity index 100%
rename from site/src/routes/repl/_components/Output/CompilerOptions.html
rename to site/src/routes/repl/_components/Output/CompilerOptions.svelte
diff --git a/site/src/routes/repl/_components/Output/PropEditor.html b/site/src/routes/repl/_components/Output/PropEditor.svelte
similarity index 95%
rename from site/src/routes/repl/_components/Output/PropEditor.html
rename to site/src/routes/repl/_components/Output/PropEditor.svelte
index a14fb0b94f..3fdbf26390 100644
--- a/site/src/routes/repl/_components/Output/PropEditor.html
+++ b/site/src/routes/repl/_components/Output/PropEditor.svelte
@@ -1,7 +1,7 @@
 <script>
 	import { createEventDispatcher } from 'svelte';
 	import * as fleece from 'golden-fleece';
-	import CodeMirror from '../CodeMirror.html';
+	import CodeMirror from '../CodeMirror.svelte';
 
 	const dispatch = createEventDispatcher();
 
diff --git a/site/src/routes/repl/_components/Output/Viewer.html b/site/src/routes/repl/_components/Output/Viewer.svelte
similarity index 100%
rename from site/src/routes/repl/_components/Output/Viewer.html
rename to site/src/routes/repl/_components/Output/Viewer.svelte
diff --git a/site/src/routes/repl/_components/Output/index.html b/site/src/routes/repl/_components/Output/index.svelte
similarity index 94%
rename from site/src/routes/repl/_components/Output/index.html
rename to site/src/routes/repl/_components/Output/index.svelte
index 467cc439b4..b97ec17aa6 100644
--- a/site/src/routes/repl/_components/Output/index.html
+++ b/site/src/routes/repl/_components/Output/index.svelte
@@ -1,9 +1,9 @@
 <script>
-	import SplitPane from '../SplitPane.html';
-	import Viewer from './Viewer.html';
-	import CompilerOptions from './CompilerOptions.html';
-	import PropEditor from './PropEditor.html';
-	import CodeMirror from '../CodeMirror.html';
+	import SplitPane from '../SplitPane.svelte';
+	import Viewer from './Viewer.svelte';
+	import CompilerOptions from './CompilerOptions.svelte';
+	import PropEditor from './PropEditor.svelte';
+	import CodeMirror from '../CodeMirror.svelte';
 
 	export let bundle;
 	export let js;
diff --git a/site/src/routes/repl/_components/Repl.html b/site/src/routes/repl/_components/Repl.svelte
similarity index 94%
rename from site/src/routes/repl/_components/Repl.html
rename to site/src/routes/repl/_components/Repl.svelte
index 53557a9170..bbe05a8847 100644
--- a/site/src/routes/repl/_components/Repl.html
+++ b/site/src/routes/repl/_components/Repl.svelte
@@ -2,11 +2,11 @@
 	import { onMount } from 'svelte';
 	import { writable } from 'svelte/store';
 	import * as fleece from 'golden-fleece';
-	import SplitPane from './SplitPane.html';
-	import CodeMirror from './CodeMirror.html';
-	import Input from './Input/index.html';
-	import Output from './Output/index.html';
-	import InputOutputToggle from './InputOutputToggle.html';
+	import SplitPane from './SplitPane.svelte';
+	import CodeMirror from './CodeMirror.svelte';
+	import Input from './Input/index.svelte';
+	import Output from './Output/index.svelte';
+	import InputOutputToggle from './InputOutputToggle.svelte';
 
 	export let version = 'beta'; // TODO change this to latest when the time comes
 	export let app;
@@ -100,7 +100,7 @@
 		const selected = $selected_store;
 
 		if (selected.name === 'App') {
-			// App.html can't be removed
+			// App.svelte can't be removed
 			selected.source = '';
 			// $selected_store.set(selected);
 		} else {
@@ -118,13 +118,13 @@
 	}
 
 	function compile(component, options) {
-		if (component.type === 'html') {
+		if (component.type === 'svelte') {
 			workers.compiler.postMessage({
 				type: 'compile',
 				source: component.source,
 				options: Object.assign({
 					name: component.name,
-					filename: `${component.name}.html`
+					filename: `${component.name}.svelte`
 				}, options),
 				entry: component === $component_store[0]
 			});
@@ -154,7 +154,7 @@
 	}
 
 	function navigate(filename) {
-		const name = filename.replace(/\.html$/, '');
+		const name = filename.replace(/\.svelte$/, '');
 
 		console.error(`TODO navigate`);
 
diff --git a/site/src/routes/repl/_components/SplitPane.html b/site/src/routes/repl/_components/SplitPane.svelte
similarity index 100%
rename from site/src/routes/repl/_components/SplitPane.html
rename to site/src/routes/repl/_components/SplitPane.svelte
diff --git a/site/src/routes/repl/embed.html b/site/src/routes/repl/embed.svelte
similarity index 87%
rename from site/src/routes/repl/embed.html
rename to site/src/routes/repl/embed.svelte
index dda614cb52..c9eb0a08ea 100644
--- a/site/src/routes/repl/embed.html
+++ b/site/src/routes/repl/embed.svelte
@@ -11,7 +11,7 @@
 <script>
 	import { onMount } from 'svelte';
 	import * as fleece from 'golden-fleece';
-	import Repl from './_components/Repl.html';
+	import Repl from './_components/Repl.svelte';
 
 	export let version, gist, demo;
 
@@ -57,12 +57,12 @@
 							source
 						};
 					})
-					.filter(x => x.type === 'html' || x.type === 'js')
+					.filter(x => x.type === 'svelte' || x.type === 'js')
 					.sort((a, b) => {
-						if (a.name === 'App' && a.type === 'html') return -1;
-						if (b.name === 'App' && b.type === 'html') return 1;
+						if (a.name === 'App' && a.type === 'svelte') return -1;
+						if (b.name === 'App' && b.type === 'svelte') return 1;
 
-						if (a.type !== b.type) return a.type === 'html' ? -1 : 1;
+						if (a.type !== b.type) return a.type === 'svelte' ? -1 : 1;
 
 						return a.name < b.name ? -1 : 1;
 					});
diff --git a/site/src/routes/repl/index.html b/site/src/routes/repl/index.svelte
similarity index 89%
rename from site/src/routes/repl/index.html
rename to site/src/routes/repl/index.svelte
index e896b5ecd5..41ad39a739 100644
--- a/site/src/routes/repl/index.html
+++ b/site/src/routes/repl/index.svelte
@@ -12,8 +12,8 @@
 	import { onMount } from 'svelte';
 	import { locate } from 'locate-character';
 	import * as fleece from 'golden-fleece';
-	import AppControls from './_components/AppControls/index.html';
-	import Repl from './_components/Repl.html';
+	import AppControls from './_components/AppControls/index.svelte';
+	import Repl from './_components/Repl.svelte';
 	import examples from '../../../content/examples/manifest.json';
 
 	export let version, demo, gist_id;
@@ -80,18 +80,21 @@
 							values = tryParseData(source) || {};
 						}
 
+						let type = file.slice(dot + 1);
+						if (type === 'html') type = 'svelte';
+
 						return {
 							name: file.slice(0, dot),
-							type: file.slice(dot + 1),
+							type,
 							source
 						};
 					})
-					.filter(x => x.type === 'html' || x.type === 'js')
+					.filter(x => x.type === 'svelte' || x.type === 'js')
 					.sort((a, b) => {
-						if (a.name === 'App' && a.type === 'html') return -1;
-						if (b.name === 'App' && b.type === 'html') return 1;
+						if (a.name === 'App' && a.type === 'svelte') return -1;
+						if (b.name === 'App' && b.type === 'svelte') return 1;
 
-						if (a.type !== b.type) return a.type === 'html' ? -1 : 1;
+						if (a.type !== b.type) return a.type === 'svelte' ? -1 : 1;
 
 						return a.name < b.name ? -1 : 1;
 					});
diff --git a/site/static/workers/bundler.js b/site/static/workers/bundler.js
index 8d05f59d23..66179bc400 100644
--- a/site/static/workers/bundler.js
+++ b/site/static/workers/bundler.js
@@ -69,7 +69,7 @@ async function getBundle(mode, cache, lookup) {
 
 	try {
 		bundle = await rollup.rollup({
-			input: './App.html',
+			input: './App.svelte',
 			external: id => {
 				if (id[0] === '.') return false;
 				if (is_svelte_module(id)) return false;
@@ -86,6 +86,8 @@ async function getBundle(mode, cache, lookup) {
 						return new URL(`${importee}.mjs`, importer).href;
 					}
 
+					if (importee.endsWith('.html')) importee = importee.replace(/\.html$/, '.svelte');
+
 					if (importee in lookup) return importee;
 				},
 				load(id) {
@@ -93,15 +95,15 @@ async function getBundle(mode, cache, lookup) {
 					if (id in lookup) return lookup[id].source;
 				},
 				transform(code, id) {
-					if (!/\.html$/.test(id)) return null;
+					if (!/\.svelte$/.test(id)) return null;
 
-					const name = id.replace(/^\.\//, '').replace(/\.html$/, '');
+					const name = id.replace(/^\.\//, '').replace(/\.svelte$/, '');
 
 					const { js, css, stats } = svelte.compile(code, Object.assign({
 						generate: mode,
 						format: 'esm',
 						name: name,
-						filename: name + '.html',
+						filename: name + '.svelte',
 						onwarn: warning => {
 							console.warn(warning.message);
 							console.log(warning.frame);