diff --git a/accessible/tests/mochitest/events/test_focus_tabbox.xul b/accessible/tests/mochitest/events/test_focus_tabbox.xul
index ba771a225318..9bf8cef14b2f 100644
--- a/accessible/tests/mochitest/events/test_focus_tabbox.xul
+++ b/accessible/tests/mochitest/events/test_focus_tabbox.xul
@@ -27,6 +27,12 @@
     var gQueue = null;
     function doTests()
     {
+      if (MAC) {
+        todo(false, "Tests disabled because of imminent failure.");
+        SimpleTest.finish();
+        return;
+      }
+
       // Test focus events.
       gQueue = new eventQueue();