--- a/widget/tests/chrome.ini
+++ b/widget/tests/chrome.ini
@@ -31,17 +31,17 @@ support-files = window_composition_text_
 [test_panel_mouse_coords.xul]
 skip-if = toolkit == "windows" # bug 1009955
 
 # Cocoa
 [test_native_menus.xul]
 skip-if = toolkit != "cocoa"
 support-files = native_menus_window.xul
 [test_native_mouse_mac.xul]
-skip-if = toolkit != "cocoa"
+skip-if = toolkit != "cocoa" || os_version == '10.10' # 10.10: bug 1137575
 support-files = native_mouse_mac_window.xul
 [test_bug413277.html]
 skip-if = toolkit != "cocoa"
 [test_bug428405.xul]
 skip-if = toolkit != "cocoa"
 [test_bug466599.xul]
 skip-if = toolkit != "cocoa"
 [test_bug485118.xul]