diff --git a/tests/test-helper.js b/tests/test-helper.ts
similarity index 94%
rename from tests/test-helper.js
rename to tests/test-helper.ts
index 4efd6e58..c8d5136c 100644
--- a/tests/test-helper.js
+++ b/tests/test-helper.ts
@@ -4,6 +4,7 @@ import * as QUnit from 'qunit';
 import { setApplication } from '@ember/test-helpers';
 import { setup } from 'qunit-dom';
 import { start } from 'ember-qunit';
+import 'qunit-dom';
 
 setApplication(Application.create(config.APP));