Use the new test runner.

test/transformer/loads_an_aggregate_transformer_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 '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
 
@@ skipping 18 matching lines @@
     }).then((contents) {
       var id = new AssetId(transform.package,
           p.url.join(transform.key, 'out.txt'));
       transform.addOutput(new Asset.fromString(id, contents.join('\\n')));
     });
   }
 }
 """;
 
 main() {
-  initConfig();
   withBarbackVersions(">=0.14.1", () {
     integration("loads an aggregate transformer", () {
       d.dir(appPath, [
         d.pubspec({
           "name": "myapp",
           "transformers": ["myapp"]
         }),
         d.dir("lib", [
           d.file("transformer.dart", AGGREGATE_TRANSFORMER),
         ]),
         d.dir("web", [
           d.file("foo.txt", "foo"),
           d.file("bar.txt", "bar")
         ])
       ]).create();
 
       createLockFile('myapp', pkg: ['barback']);
 
       pubServe();
       requestShouldSucceed("out.txt", "bar\nfoo");
       endPubServe();
     });
   });
 }