More fixes for failures on the Windows bot

pkg/analysis_server/test/services/refactoring/rename_label_test.dart

 // Copyright (c) 2014, 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 test.services.refactoring.rename_label;
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 
+import '../../utils.dart';
 import 'abstract_rename.dart';
 
 main() {
-  groupSep = ' | ';
+  initializeTestEnvironment();
   defineReflectiveTests(RenameLabelTest);
 }
 
 @reflectiveTest
 class RenameLabelTest extends RenameRefactoringTest {
   test_checkNewName_LocalVariableElement() {
     indexTestUnit('''
 main() {
 test:
   while (true) {
@@ skipping 50 matching lines @@
     break test;
   }
 }
 ''');
     // configure refactoring
     createRenameRefactoringAtString('test:');
     // old name
     expect(refactoring.oldName, 'test');
   }
 }