Use the new test runner.

test/transformer/can_log_messages_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 'package:pub/src/exit_codes.dart' as exit_codes;
 import 'package:scheduled_test/scheduled_test.dart';
 import 'package:scheduled_test/scheduled_stream.dart';
 
@@ skipping 47 matching lines @@
     transform.logger.error('ERROR!', span: sourceFile.span(11, 12));
     return transform.primaryInput.readAsString().then((contents) {
       var id = transform.primaryInput.id.changeExtension(".out");
       transform.addOutput(new Asset.fromString(id, "\$contents.out"));
     });
   }
 }
 """;
 
 main() {
-  initConfig();
   // This intentionally tests barback 0.14.2 with both transformers, since it
   // supports both types of span.
   withBarbackVersions("<0.15.0", () => runTest(SOURCE_MAPS_TRANSFORMER));
   withBarbackVersions(">=0.14.2", () => runTest(SOURCE_SPAN_TRANSFORMER));
 }
 
 void runTest(String transformerText) {
   integration("can log messages", () {
     d.dir(appPath, [
       d.pubspec({
@@ skipping 36 matching lines @@
 
     // In barback >=0.15.0, the span will point to the location where the error
     // occurred.
     pub.stderr.expect(allow(inOrder(["d", "^"])));
 
     pub.stderr.expect("Build failed.");
 
     pub.shouldExit(exit_codes.DATA);
   });
 }