Use the new test runner.

test/transformer/exclusion/works_on_dart2js_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS d.file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library pub_tests;
 
 import 'package:scheduled_test/scheduled_stream.dart';
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 import '../../serve/utils.dart';
 
 main() {
-  initConfig();
   withBarbackVersions("any", () {
     integration("works on the dart2js transformer", () {
       d.dir(appPath, [
         d.pubspec({
           "name": "myapp",
           "transformers": [
             {
               "\$dart2js": {
                 "\$include": ["web/a.dart", "web/b.dart"],
                 "\$exclude": "web/a.dart"
@@ skipping 19 matching lines @@
       server.stdout.expect(consumeThrough(emitsLines(
           "[Info from Dart2JS]:\n"
           "Compiling myapp|web/b.dart...")));
       server.stdout.expect(consumeThrough("Build completed successfully"));
 
       requestShould404("c.dart.js");
       endPubServe();
     });
   });
 }