diff --git a/dom/workers/test/serviceworkers/test_privateBrowsing.html b/dom/workers/test/serviceworkers/test_privateBrowsing.html
index 0a75bf3cf478..fafc94453a8f 100644
--- a/dom/workers/test/serviceworkers/test_privateBrowsing.html
+++ b/dom/workers/test/serviceworkers/test_privateBrowsing.html
@@ -59,7 +59,7 @@ function doTests() {
     testOnWindow(true, function(aWin) {
       wP = aWin;
       ok(!("serviceWorker" in wP.content.navigator), "ServiceWorkers are not available for private windows");
-      SimpleTest.finish();
+      runTest();
     });
   });
 }
diff --git a/dom/workers/test/test_sharedWorker_privateBrowsing.html b/dom/workers/test/test_sharedWorker_privateBrowsing.html
index 5ae8ae4e345a..60fec7e07d65 100644
--- a/dom/workers/test/test_sharedWorker_privateBrowsing.html
+++ b/dom/workers/test/test_sharedWorker_privateBrowsing.html
@@ -69,7 +69,7 @@ function doTests() {
           var sharedWorker3 = new wP.content.SharedWorker('sharedWorker_privateBrowsing.js');
           sharedWorker3.port.onmessage = function(event) {
             is(event.data, 2, "Only 2 sharedworker expected in the private window");
-            SimpleTest.finish();
+            runTest();
           }
         }
       }