diff --git a/.eslintignore b/.eslintignore
index 22c20bea9..6a170b7e5 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -6,6 +6,7 @@
 /tests/compile/*
 /tests/jsunit/*
 /tests/generators/*
+/tests/test_runner.js
 /tests/workspace_svg/*
 /generators/*
 /demos/*
diff --git a/package.json b/package.json
index d843adfd5..d2bc48a2b 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
   "scripts": {
     "lint": "eslint .",
     "pretest": "tests/scripts/test_setup.sh",
-    "test": "node tests/jsunit/test_runner.js"
+    "test": "node tests/test_runner.js"
   },
   "license": "Apache-2.0",
   "private": true,
diff --git a/tests/jsunit/run_jsunit_tests_in_browser.js b/tests/jsunit/run_jsunit_tests_in_browser.js
new file mode 100644
index 000000000..ae14cc394
--- /dev/null
+++ b/tests/jsunit/run_jsunit_tests_in_browser.js
@@ -0,0 +1,76 @@
+/**
+ * @license
+ * Visual Blocks Editor
+ *
+ * Copyright 2018 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Node.js script to run JsUnit tests in Chrome, via webdriver.
+ */
+var webdriverio = require('webdriverio');
+
+/**
+ * Runs the JsUnit tests in this directory in Chrome. It uses webdriverio to
+ * launch Chrome and load index.html. Outputs a summary of the test results
+ * to the console.
+ * @throws If any error occurs when attempting to run the tests.
+ */
+function runJsUnitTestsInBrowser() {
+  var options = {
+      desiredCapabilities: {
+          browserName: 'chrome'
+      }
+  };
+
+  //TODO: change pause to waitunitl
+  var browser = webdriverio
+      .remote(options)
+      .init()
+      .url('file://' + __dirname + '/index.html').pause(5000);
+
+
+  browser
+  .getHTML('#closureTestRunnerLog')
+  .then(function(result) {
+    // call js to parse html
+    var regex = /[\d]+\spassed,\s([\d]+)\sfailed./i;
+    var numOfFailure = regex.exec(result)[1];
+    var regex2 = /Unit Tests for Blockly .*]/;
+    var testStatus = regex2.exec(result)[0];
+    console.log('============Blockly Unit Test Summary=================');
+    console.log(testStatus);
+    var regex3 = /\d+ passed,\s\d+ failed/;
+    var detail = regex3.exec(result)[0];
+    console.log(detail);
+    console.log('============Blockly Unit Test Summary=================');
+    if ( parseInt(numOfFailure) !== 0) {
+      console.log(result);
+      process.exit(1);
+    }
+  })
+}
+
+module.exports = runJsUnitTestsInBrowser;
+
+if (require.main === module) {
+  try {
+    runJsUnitTestsInBrowser();
+  } catch(errorStr) {
+    console.error(errorStr);
+    process.exit(1);
+  }
+}
diff --git a/tests/jsunit/test_runner.js b/tests/jsunit/test_runner.js
deleted file mode 100644
index bfd7c0bd3..000000000
--- a/tests/jsunit/test_runner.js
+++ /dev/null
@@ -1,35 +0,0 @@
-var webdriverio = require('webdriverio');
-var options = {
-    desiredCapabilities: {
-        browserName: 'chrome'
-    }
-};
-
-var path = process.cwd();
-//TODO: change pause to waitunitl
-var browser = webdriverio
-    .remote(options)
-    .init()
-    .url("file://" + path + "/tests/jsunit/index.html").pause(5000);
-
-
-browser
-.getHTML('#closureTestRunnerLog')
-.then(function(result) {
-   // call js to parse html
-   var regex = /[\d]+\spassed,\s([\d]+)\sfailed./i;
-   var numOfFailure = regex.exec(result)[1];
-  var regex2 = /Unit Tests for Blockly .*]/;
-  var testStatus = regex2.exec(result)[0];
-  console.log("============Blockly Unit Test Summary=================");
-   console.log(testStatus);
-   var regex3 = /\d+ passed,\s\d+ failed/;
-   var detail = regex3.exec(result)[0];
-   console.log(detail);
-  console.log("============Blockly Unit Test Summary=================");
-   if ( parseInt(numOfFailure) !== 0) {
-     console.log(result);
-     process.exit(1);
-    }
-})
-.catch(function(err) { console.log(err); process.exit(1); });
diff --git a/tests/test_runner.js b/tests/test_runner.js
new file mode 100644
index 000000000..e21f3ec0a
--- /dev/null
+++ b/tests/test_runner.js
@@ -0,0 +1,44 @@
+/**
+ * @license
+ * Visual Blocks Editor
+ *
+ * Copyright 2018 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Node.js script to run all tests.
+ */
+if (require.main !== module) {
+  throw __filename + ' must be called directly.';
+}
+
+var testFns = [
+      require('./jsunit/run_jsunit_tests_in_browser')
+    ];
+
+var errored = false;
+testFns.forEach((testFn) => {
+  try {
+    testFn();
+  } catch (errorStr) {
+    errored = true;
+    console.error(errorStr + '\n\n');
+  }
+});
+
+if (errored) {
+  process.exit(1);
+}