Use the new test runner.

test/transformer/prefers_transformer_to_library_name_test.dart

 // Copyright (c) 2013, 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 '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
 
@@ skipping 10 matching lines @@
   Future apply(Transform transform) {
     return transform.primaryInput.readAsString().then((contents) {
       var id = transform.primaryInput.id.changeExtension(".wrong");
       transform.addOutput(new Asset.fromString(id, "\$contents.wrong"));
     });
   }
 }
 """;
 
 main() {
-  initConfig();
   withBarbackVersions("any", () {
     integration("prefers transformer.dart to <package name>.dart", () {
       d.dir(appPath, [
         d.pubspec({
           "name": "myapp",
           "transformers": ["myapp"]
         }),
         d.dir("lib", [
           d.file("transformer.dart", REWRITE_TRANSFORMER),
           d.file("myapp.dart", WRONG_TRANSFORMER)
         ]),
         d.dir("web", [
           d.file("foo.txt", "foo")
         ])
       ]).create();
 
       createLockFile('myapp', pkg: ['barback']);
 
       pubServe();
       requestShouldSucceed("foo.out", "foo.out");
       requestShould404("foo.wrong");
       endPubServe();
     });
   });
 }