diff --git a/accessible/tests/mochitest/events/test_focus_dialog.html b/accessible/tests/mochitest/events/test_focus_dialog.html
index 80591ff7955..f59bbd8975b 100644
--- a/accessible/tests/mochitest/events/test_focus_dialog.html
+++ b/accessible/tests/mochitest/events/test_focus_dialog.html
@@ -21,7 +21,7 @@
           src="../states.js"></script>
 
   <script type="application/javascript">
-    if (navigator.platform.startsWith("Win")) {
+    if (!navigator.platform.startsWith("Linux")) {
       SimpleTest.expectAssertions(0, 1);
     }