diff --git a/tests/wpt/web-platform-tests/dom/nodes/attributes.html b/tests/wpt/web-platform-tests/dom/nodes/attributes.html
index 76a501c37ca..97aef599fc9 100644
--- a/tests/wpt/web-platform-tests/dom/nodes/attributes.html
+++ b/tests/wpt/web-platform-tests/dom/nodes/attributes.html
@@ -585,7 +585,7 @@ function getEnumerableOwnProps1(obj) {
 
 function getEnumerableOwnProps2(obj) {
   return Object.getOwnPropertyNames(obj).filter(
-    (name) => Object.getOwnPropertyDescriptor(obj, name).enumerable)
+    function (name) { return Object.getOwnPropertyDescriptor(obj, name).enumerable; })
 }
 
 test(function() {