--- a/mail/test/mozmill/folder-display/test-watch-ignore-thread.js
+++ b/mail/test/mozmill/folder-display/test-watch-ignore-thread.js
@@ -23,16 +23,21 @@ function setupModule(module) {
   thread1 = create_thread(3);
   thread2 = create_thread(4);
   thread3 = create_thread(5);
   add_sets_to_folders([folder], [thread1, thread2, thread3]);
 
   be_in_folder(folder);
   make_display_threaded();
   expand_all_threads();
+
+  if (mc.mozmillModule.isMac) {
+    test_view_threads_ignored_threads.__force_skip__ = true;
+    test_watch_thread.__force_skip__ = true;
+  }
 }
 
 /**
  * Test that Ignore Thread works as expected.
  */
 function test_ignore_thread() {
   let t1root = thread1.getMsgHdr(0);