--- a/layout/reftests/stylesheet-cloning/reftest.list
+++ b/layout/reftests/stylesheet-cloning/reftest.list
@@ -1,7 +1,7 @@
-fuzzy-if(webrender,212,342) == counter-style-rule-clone.html glyphs-ref.html # passes trivially
+fuzzy-if(webrender,255-255,434-434) == 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
 == insert-after-clone.html shouldbegreen-ref.html
 == style-rule-clone.html shouldbegreen-ref.html
 == supports-rule-clone.html shouldbegreen-ref.html