diff --git a/accessible/tests/mochitest/editabletext/test_1.html b/accessible/tests/mochitest/editabletext/test_1.html
index c6efd061add9..0dadddf482e9 100644
--- a/accessible/tests/mochitest/editabletext/test_1.html
+++ b/accessible/tests/mochitest/editabletext/test_1.html
@@ -20,9 +20,9 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=452161
 
   <script type="application/javascript">
     if (navigator.platform.startsWith("Mac")) {
-      SimpleTest.expectAssertions(0, 3);
+      SimpleTest.expectAssertions(0, 1);
     } else {
-      SimpleTest.expectAssertions(3);
+      SimpleTest.expectAssertions(1);
     }
 
     function addTestEditable(aID, aTestRun, aTrailChar)