diff --git a/content/base/test/csp/test_policyuri_regression_from_multipolicy.html b/content/base/test/csp/test_policyuri_regression_from_multipolicy.html
index 0cb040cbec03..44ec54c017ed 100644
--- a/content/base/test/csp/test_policyuri_regression_from_multipolicy.html
+++ b/content/base/test/csp/test_policyuri_regression_from_multipolicy.html
@@ -12,10 +12,11 @@
 <body>
 <iframe style="width:200px;height:200px;" id='testframe'></iframe>
 <script class="testbody" type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+
 SpecialPowers.pushPrefEnv(
   {'set':[["security.csp.speccompliant", true]]},
-  function() {
-    SimpleTest.waitForExplicitFinish();
+  function () {
     var testframe = document.getElementById('testframe');
     testframe.src = 'file_policyuri_regression_from_multipolicy.html';
     testframe.addEventListener('load', function checkInlineScriptExecuted () {
