diff --git a/netwerk/test/mochitests/test_different_domain_in_hierarchy.html b/netwerk/test/mochitests/test_different_domain_in_hierarchy.html
index 33164ce1578f..ad7e9f0cda0b 100644
--- a/netwerk/test/mochitests/test_different_domain_in_hierarchy.html
+++ b/netwerk/test/mochitests/test_different_domain_in_hierarchy.html
@@ -5,7 +5,7 @@
   <script src="/tests/SimpleTest/SimpleTest.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
-<body onload="setupTest('http://example.org/tests/netwerk/test/mochitests/file_domain_hierarchy_inner.html', 3, 3)">
+<body onload="setupTest('http://example.org/tests/netwerk/test/mochitests/file_domain_hierarchy_inner.html', 4, 3)">
 <p id="display"></p>
 <pre id="test">
 <script class="testbody" type="text/javascript" src="file_testcommon.js">
