pkg/unittest: test cleanup

pkg/unittest/test/missing_tick_test.dart

Index: pkg/unittest/test/missing_tick_test.dart
diff --git a/pkg/unittest/test/missing_tick_test.dart b/pkg/unittest/test/missing_tick_test.dart
index 19c5b8946ebf00754d92cbce4a43e308cadb1f14..bc7bd580fc0c7e56cfde0fc42f8a8316b95b7938 100644
--- a/pkg/unittest/test/missing_tick_test.dart
+++ b/pkg/unittest/test/missing_tick_test.dart
@@ -2,10 +2,12 @@
 // 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 unittest.missing_tick_test;
+
 import 'package:unittest/unittest.dart';
 
 // TODO(gram): Convert to a shouldFail passing test.
-main() {
+void main() {
   SimpleConfiguration config = unittestConfiguration;
   config.timeout = const Duration(seconds: 2);
   group('Broken', () {