diff --git a/dom/workers/URL.cpp b/dom/workers/URL.cpp
index 2bb0f2802c47..c1220fbab2c4 100644
--- a/dom/workers/URL.cpp
+++ b/dom/workers/URL.cpp
@@ -144,7 +144,7 @@ public:
 
       principal = doc->NodePrincipal();
     } else {
-      MOZ_ASSERT_IF(!mWorkerPrivate->GetParent(), mWorkerPrivate->IsChromeWorker());
+      MOZ_ASSERT(mWorkerPrivate->IsChromeWorker());
       principal = mWorkerPrivate->GetPrincipal();
     }
 
@@ -199,7 +199,7 @@ public:
 
       principal = doc->NodePrincipal();
     } else {
-      MOZ_ASSERT_IF(!mWorkerPrivate->GetParent(), mWorkerPrivate->IsChromeWorker());
+      MOZ_ASSERT(mWorkerPrivate->IsChromeWorker());
       principal = mWorkerPrivate->GetPrincipal();
     }
 
diff --git a/dom/workers/test/test_url.html b/dom/workers/test/test_url.html
index 2916a094d55a..0ce5976c2a3d 100644
--- a/dom/workers/test/test_url.html
+++ b/dom/workers/test/test_url.html
@@ -21,7 +21,7 @@
     is(event.target, worker);
 
     if (event.data.type == 'finish') {
-      runTest();
+      SimpleTest.finish();
     } else if (event.data.type == 'status') {
       ok(event.data.status, event.data.msg);
     } else if (event.data.type == 'url') {
@@ -42,22 +42,8 @@
     SimpleTest.finish();
   };
 
-  var tests = [
-    function() { worker.postMessage(0); },
-    function() { worker.postMessage(4); }
-  ];
+  worker.postMessage(true);
 
-  function runTest() {
-    if (!tests.length) {
-      SimpleTest.finish();
-      return;
-    }
-
-    var test = tests.shift();
-    test();
-  }
-
-  runTest();
   SimpleTest.waitForExplicitFinish();
 
 </script>
diff --git a/dom/workers/test/url_worker.js b/dom/workers/test/url_worker.js
index 4d8c84fc610c..0c7c2d8b930d 100644
--- a/dom/workers/test/url_worker.js
+++ b/dom/workers/test/url_worker.js
@@ -1,14 +1,4 @@
-onmessage = function(event) {
-  if (event.data != 0) {
-    var worker = new Worker('url_worker.js');
-    worker.onmessage = function(event) {
-      postMessage(event.data);
-    }
-
-    worker.postMessage(event.data - 1);
-    return;
-  }
-
+onmessage = function() {
   status = false;
   try {
     if ((URL instanceof Object)) {