diff --git a/layout/reftests/stylesheet-cloning/reftest.list b/layout/reftests/stylesheet-cloning/reftest.list
index a3286db2e6cc..dc628df8244d 100644
--- a/layout/reftests/stylesheet-cloning/reftest.list
+++ b/layout/reftests/stylesheet-cloning/reftest.list
@@ -1,4 +1,4 @@
-fuzzy-if(webrender,255-255,434-434) == counter-style-rule-clone.html glyphs-ref.html # passes trivially
+fails-if(webrender) == counter-style-rule-clone.html glyphs-ref.html # passes trivially
 # because "Dynamic change on @counter-style not yet supported"
 == document-rule-clone.html shouldbegreen-ref.html
 == media-rule-clone.html shouldbegreen-ref.html