Use the new test runner.

test/upgrade/report/shows_newer_available_versions_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.
 
 library pub_tests;
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
-  initConfig();
   integration("shows how many newer versions are available", () {
     servePackages((builder) {
       builder.serve("multiple_newer", "1.0.0");
       builder.serve("multiple_newer", "1.0.1-unstable.1");
       builder.serve("multiple_newer", "1.0.1");
       builder.serve("multiple_newer", "1.0.2-unstable.1");
       builder.serve("multiple_newer_stable", "1.0.0");
       builder.serve("multiple_newer_stable", "1.0.1");
       builder.serve("multiple_newer_stable", "1.0.2");
       builder.serve("multiple_newer_unstable", "1.0.0");
@@ skipping 21 matching lines @@
 Resolving dependencies\.\.\..*
 . multiple_newer 1\.0\.0 \(1\.0\.1 available\)
 . multiple_newer_stable 1\.0\.0 \(1\.0\.2\ available\)
 . multiple_newer_unstable 1\.0\.0 \(1\.0\.1-unstable\.2 available\)
 . no_newer 1\.0\.0
 . one_newer_stable 1\.0\.0 \(1\.0\.1 available\)
 . one_newer_unstable 1\.0\.0 \(1\.0\.1-unstable\.1 available\)
 """, multiLine: true));
   });
 }