diff --git a/test/parallel/test-child-process-default-options.js b/test/parallel/test-child-process-default-options.js
index 18a5dd5e482..a0ab2bfd4d9 100644
--- a/test/parallel/test-child-process-default-options.js
+++ b/test/parallel/test-child-process-default-options.js
@@ -45,6 +45,6 @@ child.stdout.on('data', function(chunk) {
 
 process.on('exit', function() {
   assert.ok(response.includes('HELLO=WORLD'),
-            'spawn did not use process.env as default' +
+            'spawn did not use process.env as default ' +
             `(process.env.HELLO = ${process.env.HELLO})`);
 });
diff --git a/test/parallel/test-cluster-basic.js b/test/parallel/test-cluster-basic.js
index e3440518fb7..8a0a41f90c5 100644
--- a/test/parallel/test-cluster-basic.js
+++ b/test/parallel/test-cluster-basic.js
@@ -26,7 +26,7 @@ const assert = require('assert');
 const cluster = require('cluster');
 
 assert.strictEqual('NODE_UNIQUE_ID' in process.env, false,
-                   `NODE_UNIQUE_ID (${process.env.NODE_UNIQUE_ID})` +
+                   `NODE_UNIQUE_ID (${process.env.NODE_UNIQUE_ID}) ` +
                    'should be removed on startup');
 
 function forEach(obj, fn) {
diff --git a/test/parallel/test-promises-unhandled-rejections.js b/test/parallel/test-promises-unhandled-rejections.js
index 4494e5084d2..a00a7836252 100644
--- a/test/parallel/test-promises-unhandled-rejections.js
+++ b/test/parallel/test-promises-unhandled-rejections.js
@@ -182,7 +182,7 @@ asyncTest('When re-throwing new errors in a promise catch, only the' +
   });
 });
 
-asyncTest('Test params of unhandledRejection for a synchronously-rejected' +
+asyncTest('Test params of unhandledRejection for a synchronously-rejected ' +
           'promise', function(done) {
   const e = new Error();
   onUnhandledSucceed(done, function(reason, promise) {
@@ -294,7 +294,7 @@ asyncTest('While inside setImmediate, catching a rejected promise derived ' +
 });
 
 // State adapation tests
-asyncTest('catching a promise which is asynchronously rejected (via' +
+asyncTest('catching a promise which is asynchronously rejected (via ' +
           'resolution to an asynchronously-rejected promise) prevents' +
           ' unhandledRejection', function(done) {
   const e = new Error();
@@ -378,7 +378,7 @@ asyncTest(
 );
 
 // Combinations with Promise.all
-asyncTest('Catching the Promise.all() of a collection that includes a' +
+asyncTest('Catching the Promise.all() of a collection that includes a ' +
           'rejected promise prevents unhandledRejection', function(done) {
   const e = new Error();
   onUnhandledFail(done);
@@ -662,7 +662,7 @@ asyncTest('nextTick is immediately scheduled when called inside an event' +
 });
 
 asyncTest('Throwing an error inside a rejectionHandled handler goes to' +
-          ' unhandledException, and does not cause .catch() to throw an' +
+          ' unhandledException, and does not cause .catch() to throw an ' +
           'exception', function(done) {
   clean();
   const e = new Error();