diff --git a/js/xpconnect/tests/chrome/test_bug1124898.html b/js/xpconnect/tests/chrome/test_bug1124898.html
index f650d9a3bfe..40774cfdf7c 100644
--- a/js/xpconnect/tests/chrome/test_bug1124898.html
+++ b/js/xpconnect/tests/chrome/test_bug1124898.html
@@ -13,6 +13,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=1124898
 
   /** Test for Bug 1124898 **/
   SimpleTest.waitForExplicitFinish();
+  SimpleTest.expectAssertions(0, 1); // Dumb unrelated widget assertion - see bug 1126023.
   var w = window.open("about:blank", "w", "chrome");
   is(w.eval('typeof getAttention'), 'function', 'getAttention exists on regular chrome window');
   is(w.eval('typeof messageManager'), 'object', 'messageManager exists on regular chrome window');