More fixes for failures on the Windows bot

pkg/analyzer/test/src/context/test_all.dart

Index: pkg/analyzer/test/src/context/test_all.dart
diff --git a/pkg/analyzer/test/src/context/test_all.dart b/pkg/analyzer/test/src/context/test_all.dart
index d3e5f76a5291acf520ed7caeff762d26eb0ff76c..bbd021d183c13ef895367e736654adda9e3b5206 100644
--- a/pkg/analyzer/test/src/context/test_all.dart
+++ b/pkg/analyzer/test/src/context/test_all.dart
@@ -6,12 +6,13 @@ library test.src.context.test_all;
 
 import 'package:unittest/unittest.dart';
 
+import '../../utils.dart';
 import 'cache_test.dart' as cache_test;
 import 'context_test.dart' as context_test;
 
 /// Utility for manually running all tests.
 main() {
-  groupSep = ' | ';
+  initializeTestEnvironment();
   group('context tests', () {
     cache_test.main();
     context_test.main();