Use the new test runner.

test/transformer/asset_not_found_exceptions_are_detectable_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 'dart:convert';
 
 import 'package:scheduled_test/scheduled_stream.dart';
 
@@ skipping 20 matching lines @@
           JSON.encode({
         'package': error.id.package,
         'path': error.id.path
       })));
     });
   }
 }
 """;
 
 main() {
-  initConfig();
   withBarbackVersions("any", () {
     integration("AssetNotFoundExceptions are detectable", () {
       d.dir(appPath, [
         d.pubspec({
           "name": "myapp",
           "transformers": ["myapp/src/transformer"]
         }),
         d.dir("lib", [d.dir("src", [
           d.file("transformer.dart", transformer)
         ])]),
@@ skipping 10 matching lines @@
         "path": "nonexistent"
       }));
       endPubServe();
 
       // Since the AssetNotFoundException was caught and handled, the server
       // shouldn't print any error information for it.
       server.stderr.expect(isDone);
     });
   });
 }