diff --git a/dom/tests/mochitest/ajax/offline/Makefile.in b/dom/tests/mochitest/ajax/offline/Makefile.in
index 69ed8da21136..281394345a42 100644
--- a/dom/tests/mochitest/ajax/offline/Makefile.in
+++ b/dom/tests/mochitest/ajax/offline/Makefile.in
@@ -98,6 +98,7 @@ MOCHITEST_FILES	= \
 	test_missingManifest.html \
 	missing.html \
 	jupiter.jpg \
+	test_cancelOfflineCache.html \
 	$(NULL)
 
 # test_offlineMode.html disabled due to bug 656943
diff --git a/dom/tests/mochitest/ajax/offline/test_cancelOfflineCache.html b/dom/tests/mochitest/ajax/offline/test_cancelOfflineCache.html
new file mode 100644
index 000000000000..d315c4af2cc8
--- /dev/null
+++ b/dom/tests/mochitest/ajax/offline/test_cancelOfflineCache.html
@@ -0,0 +1,59 @@
+<html xmlns="http://www.w3.org/1999/xhtml" manifest="http://mochi.test:8888/tests/dom/tests/mochitest/ajax/offline/simpleManifest.cacheManifest">
+<head>
+<title>Cancel offline cache</title>
+
+<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+<script type="text/javascript" src="/tests/dom/tests/mochitest/ajax/offline/offlineTests.js"></script>
+<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+
+<script type="text/javascript">
+
+var manifest = "http://mochi.test:8888/tests/dom/tests/mochitest/ajax/offline/simpleManifest.cacheManifest";
+var manifestURI = Cc["@mozilla.org/network/io-service;1"]
+                  .getService(Ci.nsIIOService)
+                  .newURI(manifest, null, null);
+var updateService = Cc['@mozilla.org/offlinecacheupdate-service;1']
+                    .getService(Ci.nsIOfflineCacheUpdateService);
+
+function manifestCached () {
+  OfflineTest.ok(false, "The update was supposed to be canceled");
+
+  OfflineTest.teardown();
+  OfflineTest.finish();
+}
+
+function onError () {
+  OfflineTest.ok(true, "Expected error: Update canceled");
+
+  OfflineTest.teardown();
+  OfflineTest.finish();
+}
+
+function onProgress () {
+  var i = 0;
+  while (i < updateService.numUpdates) {
+    var update = updateService.getUpdate(i);
+    if (update.manifestURI.spec == manifestURI.spec) {
+      update.cancel();
+      return;
+    }
+    i++;
+  }
+}
+
+if (OfflineTest.setup()) {
+  applicationCache.onerror = OfflineTest.priv(onError);
+  applicationCache.onprogress = OfflineTest.priv(onProgress);
+  applicationCache.oncached = OfflineTest.priv(manifestCached);
+}
+
+SimpleTest.waitForExplicitFinish();
+
+</script>
+
+</head>
+
+<body>
+
+</body>
+</html>
