diff --git a/mozilla/toolkit/content/tests/chrome/Makefile.in b/mozilla/toolkit/content/tests/chrome/Makefile.in
index 5d7c7b258ac..1ce9f35e4ff 100644
--- a/mozilla/toolkit/content/tests/chrome/Makefile.in
+++ b/mozilla/toolkit/content/tests/chrome/Makefile.in
@@ -58,9 +58,12 @@ _TEST_FILES = 	bug288254_window.xul \
 		window_popup_preventdefault_chrome.xul \
 		test_largemenu.xul \
 		window_largemenu.xul \
-		test_panel_focus.xul \
-		window_panel_focus.xul \
 		$(NULL)
 
+ifeq (,$(filter mac cocoa,$(MOZ_WIDGET_TOOLKIT)))
+_TEST_FILES += test_panel_focus.xul \
+               window_panel_focus.xul
+endif
+
 libs:: $(_TEST_FILES)
 	$(INSTALL) $(foreach f,$^,"$f") $(DEPTH)/_tests/testing/mochitest/chrome/$(relativesrcdir)