diff --git a/spec/shadow/index.html b/spec/shadow/index.html
index 2137e264..578eb237 100644
--- a/spec/shadow/index.html
+++ b/spec/shadow/index.html
@@ -1878,7 +1878,7 @@ <h2>Shadow DOM Example</h2>
 }
 
 document.addEventListener('DOMContentLoaded', function() {
-    [].forEach.call(document.querySelectorAll('ul.stories'), makeShadowTree);
+    document.querySelectorAll('ul.stories').forEach(makeShadowTree);
 });
       </pre>