diff --git a/tests/src/test/js/frame.js b/tests/src/test/js/frame.js
index e09a445ac..a5e20f032 100644
--- a/tests/src/test/js/frame.js
+++ b/tests/src/test/js/frame.js
@@ -22,19 +22,24 @@ window.addEventListener("message", event => {
         launchTest(response => {
             event.source.postMessage(response, "*");
         });
+    }, error => {
+        event.source.postMessage({ status: "failed", errorMessage: error }, "*");
     });
 });
 
-function appendFiles(files, index, callback) {
+function appendFiles(files, index, callback, errorCallback) {
     if (index === files.length) {
         callback();
     } else {
         let fileName = "file://" + files[index];
         let script = document.createElement("script");
-        script.src = fileName;
         script.onload = () => {
-            appendFiles(files, index + 1, callback);
+            appendFiles(files, index + 1, callback, errorCallback);
         };
+        script.onerror = () => {
+            errorCallback("failed to load script" + fileName);
+        };
+        script.src = fileName;
         document.body.appendChild(script);
     }
 }
diff --git a/tests/src/test/js/src/run-tests.js b/tests/src/test/js/src/run-tests.js
index 5f6cff1e5..c5aeda8c6 100644
--- a/tests/src/test/js/src/run-tests.js
+++ b/tests/src/test/js/src/run-tests.js
@@ -16,6 +16,7 @@
 
 "use strict";
 import * as fs from "./promise-fs.js";
+import * as nodePath from "path";
 import * as http from "http";
 import { server as WebSocketServer } from "websocket";
 
@@ -83,7 +84,7 @@ async function runAll() {
         console.log();
     }
 
-    console.log("Tests run: " + runner.testRun + ", failed: " + runner.testsFailed.length
+    console.log("Tests run: " + runner.testsRun + ", failed: " + runner.testsFailed.length
             + ", elapsed " + ((endTime - startTime) / 1000) + " seconds");
 
     if (runner.testsFailed.length > 0) {
@@ -143,7 +144,7 @@ class TestRunner {
             request.tests = suite.testCases.map(testCase => {
                 return {
                     name: testCase.name,
-                    files: testCase.files.map(fileName => process.cwd() + "/" + fileName)
+                    files: testCase.files.map(fileName => nodePath.resolve(process.cwd(), fileName))
                 };
             });
             this.testsRun += suite.testCases.length;