--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -1389,17 +1389,17 @@ pref(dom.use_xbl_scopes_for_remote_xul,t
 == 496840-1.html 496840-1-ref.html
 fuzzy-if(skiaContent,1,17000) == 498228-1.xul 498228-1-ref.xul
 == 501037.html 501037-ref.html
 == 501257-1a.html 501257-1-ref.html
 == 501257-1b.html 501257-1-ref.html
 == 501257-1.xhtml 501257-1-ref.xhtml
 == 501627-1.html 501627-1-ref.html
 == 502288-1.html 502288-1-ref.html
-== 502447-1.html 502447-1-ref.html
+fuzzy-if(gtkWidget,1,2) == 502447-1.html 502447-1-ref.html #Bug 1315834
 == 502795-1.html 502795-1-ref.html
 == 502942-1.html 502942-1-ref.html
 == 503364-1a.html 503364-1-ref.html
 == 503364-1b.html 503364-1-ref.html
 # Reftest for bug 503531 marked as failing; should be re-enabled when
 # bug 607548 gets resolved.
 needs-focus fails == 503531-1.html 503531-1-ref.html
 == 504032-1.html 504032-1-ref.html