Use the new test runner.

test/validator/dependency_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS 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.
 
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:http/http.dart' as http;
 import 'package:http/testing.dart';
 import 'package:path/path.dart' as path;
@@ skipping 37 matching lines @@
       }), 200));
     }
   }));
 
   d.dir(appPath, [
     d.libPubspec("test_pkg", "1.0.0", deps: {"foo": dep})
   ]).create();
 }
 
 main() {
-  initConfig();
-
   group('should consider a package valid if it', () {
     integration('looks normal', () {
       d.validPackage.create();
       expectNoValidationError(dependency);
     });
 
     integration('has a ^ constraint with an appropriate SDK constraint', () {
       d.dir(appPath, [
         d.libPubspec("test_pkg", "1.0.0", deps: {
           "foo": "^1.2.3"
@@ skipping 338 matching lines @@
           d.libPubspec("test_pkg", "1.0.0", deps: {
             "foo": "^1.2.3"
           }, sdk: ">=1.5.0 <2.0.0")
         ]).create();
 
         expectDependencyValidationError('  foo: ">=1.2.3 <2.0.0"');
       });
     });
   });
 }