diff --git a/vendor/overwrite-qunit-dom-root-element.js b/vendor/overwrite-qunit-dom-root-element.js
index 3dc9d13f8..6bcfdd6f2 100644
--- a/vendor/overwrite-qunit-dom-root-element.js
+++ b/vendor/overwrite-qunit-dom-root-element.js
@@ -1 +1,7 @@
-QUnit.assert.dom.rootElement = document.querySelector('#ember-testing');
+Object.defineProperty(QUnit.assert.dom, 'rootElement', {
+  get: function() {
+    return document.querySelector('#ember-testing');
+  },
+  enumerable: true,
+  configurable: true,
+});