--- a/toolkit/content/tests/widgets/videocontrols_direction_test.js
+++ b/toolkit/content/tests/widgets/videocontrols_direction_test.js
@@ -16,17 +16,18 @@ RemoteCanvas.prototype.load = function(c
   iframe.id = this.id + "-iframe";
   iframe.width = RemoteCanvas.CANVAS_WIDTH + "px";
   iframe.height = RemoteCanvas.CANVAS_HEIGHT + "px";
   iframe.src = this.url;
   var me = this;
   iframe.addEventListener("load", function() {
     var m = iframe.contentDocument.getElementById("av");
     m.addEventListener("suspend", function(aEvent) {
-      if (aEvent.loaded == aEvent.total) {
+      if (m.readyState == m.HAVE_ENOUGH_DATA &&
+          aEvent.loaded == aEvent.total) {
         m.removeEventListener("suspend", arguments.callee, false);
         setTimeout(function() {
           me.remotePageLoaded(callback);
         }, 0);
       }
     }, false);
     m.src = m.getAttribute("source");
   }, false);