--- a/devtools/client/webaudioeditor/test/browser_callwatcher-02.js
+++ b/devtools/client/webaudioeditor/test/browser_callwatcher-02.js
@@ -27,18 +27,18 @@ add_task(async function() {
   is(error.message, "Argument 1 is not valid for any of the 2-argument overloads of AudioNode.connect.", "error has correct message");
   is(error.stringified, "TypeError: Argument 1 is not valid for any of the 2-argument overloads of AudioNode.connect.", "error is stringified correctly");
   is(error.instanceof, true, "error is correctly an instanceof TypeError");
   is(error.fileName, "http://example.com/browser/devtools/client/webaudioeditor/test/doc_bug_1112378.html", "error has correct fileName");
 
   error = await evalInDebuggee("throwDOMException()");
   is(error.lineNumber, 37, "exception has correct lineNumber");
   is(error.columnNumber, 0, "exception has correct columnNumber");
-  is(error.code, 9, "exception has correct code");
-  is(error.result, 2152923145, "exception has correct result");
-  is(error.name, "NotSupportedError", "exception has correct name");
-  is(error.message, "Operation is not supported", "exception has correct message");
-  is(error.stringified, "NotSupportedError: Operation is not supported", "exception is stringified correctly");
+  is(error.code, 0, "exception has correct code");
+  is(error.result, 2152923163, "exception has correct result");
+  is(error.name, "RangeError", "exception has correct name");
+  is(error.message, "The method parameter is out of valid range.", "exception has correct message");
+  is(error.stringified, "RangeError: The method parameter is out of valid range.", "exception is stringified correctly");
   is(error.instanceof, true, "exception is correctly an instance of DOMException");
   is(error.filename, "http://example.com/browser/devtools/client/webaudioeditor/test/doc_bug_1112378.html", "exception has correct filename");
 
   await teardown(target);
 });