--- a/testing/mochitest/manifestLibrary.js
+++ b/testing/mochitest/manifestLibrary.js
@@ -43,21 +43,21 @@ function getTestManifest(url, params, ca
   var req = new XMLHttpRequest();
   req.open("GET", url);
   req.onload = function() {
     if (req.readyState == 4) {
       if (req.status == 200) {
         try {
           parseTestManifest(JSON.parse(req.responseText), params, callback);
         } catch (e) {
-          dump("TEST-UNEXPECTED-FAIL: setup.js | error parsing " + url + " (" + e + ")\n");
+          dump("TEST-UNEXPECTED-FAIL: manifestLibrary.js | error parsing " + url + " (" + e + ")\n");
           throw e;
         }
       } else {
-        dump("TEST-UNEXPECTED-FAIL: setup.js | error loading " + url + "\n");
+        dump("TEST-UNEXPECTED-FAIL: manifestLibrary.js | error loading " + url + " (HTTP " + req.status + ")\n");
         callback({});
       }
     }
   }
   req.send();
 }
 
 // Test Filtering Code