diff --git a/package.json b/package.json
index 2973dcd1af..a5666c3e36 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "description": "Generate .docx documents with JavaScript (formerly Office-Clippy)",
   "main": "build/build.js",
   "scripts": {
+    "pretest": "tsc ts/test/*Test.ts --module commonjs",
     "test": "test"
   },
   "repository": {
diff --git a/ts/tests/docxTest.ts b/ts/tests/docxTest.ts
new file mode 100644
index 0000000000..e69de29bb2