diff --git a/browser/base/content/test/Makefile.in b/browser/base/content/test/Makefile.in
index 443f3f6b876c..a6e30f612931 100644
--- a/browser/base/content/test/Makefile.in
+++ b/browser/base/content/test/Makefile.in
@@ -50,6 +50,7 @@ _TEST_FILES =	test_feed_discovery.html \
 		$(NULL)
 
 # browser_bug423833.js disabled temporarily since it's unreliable
+# browser_bug427559.js disabled temporarily..
 _BROWSER_FILES = browser_bug321000.js \
                  browser_bug405137.js \
                  browser_bug409481.js \
@@ -60,12 +61,6 @@ _BROWSER_FILES = browser_bug321000.js \
                  browser_getshortcutoruri.js \
     $(NULL)
 
-ifeq (,$(filter cocoa, $(MOZ_WIDGET_TOOLKIT)))
-_BROWSER_FILES += \
-                  browser_bug427559.js \
-    $(NULL)
-endif
-
 libs:: $(_TEST_FILES)
 	$(INSTALL) $(foreach f,$^,"$f") $(DEPTH)/_tests/testing/mochitest/tests/$(relativesrcdir)