Use the new test runner.

test/transformer/loads_different_configurations_from_the_same_isolate_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';
 
 main() {
-  initConfig();
   withBarbackVersions("any", () {
     integration("loads different configurations from the same isolate", () {
       // If different configurations are loaded from different isolates, a
       // transformer can end up being loaded twice. It's even possible for the
       // second load to use code that's transformed by the first, which is
       // really bad. This tests sets up such a scenario.
       //
       // The foo package has two self-transformers: foo/first and foo/second,
       // loaded in that order. This means that *no instances of foo/first*
       // should ever have their code transformed by foo/second.
@@ skipping 56 matching lines @@
           'const TOKEN = "(myapp/first, foo/first in myapp)";');
 
       // foo/second should be transformed by only foo/first.
       requestShouldSucceed("second.dart",
           'const TOKEN = "(myapp/second, (foo/second, foo/first in foo))";');
 
       endPubServe();
     });
   });
 }