diff --git a/layout/style/crashtests/crashtests.list b/layout/style/crashtests/crashtests.list
index 3cd927c34fbb..ae40b1822e34 100644
--- a/layout/style/crashtests/crashtests.list
+++ b/layout/style/crashtests/crashtests.list
@@ -262,4 +262,4 @@ load 1413288.html
 load 1413361.html
 load 1415663.html
 pref(dom.webcomponents.enabled,true) load 1415353.html
-pref(dom.webcomponents.enabled,true) load 1415021.html
+load 1415021.html # This should have dom.webcomponents.enabled=true, but it leaks the world, see bug 1416296.