diff --git a/test/dom/forms.browser.mocha.js b/test/dom/forms.browser.mocha.js
index e4d00b31..99724341 100644
--- a/test/dom/forms.browser.mocha.js
+++ b/test/dom/forms.browser.mocha.js
@@ -3,10 +3,9 @@ var domTestRunner = require('../../src/test-utils/domTestRunner');
 
 describe('forms', function() {
   const runner = domTestRunner.install();
-  const { window } = runner;
 
   function createEvent(type) {
-    return new window.Event(type, {bubbles: true});
+    return new runner.window.Event(type, {bubbles: true});
   }
 
   describe('textarea', function() {