Use package:test_reflective_loader instead of reflective_tests.

pkg/analysis_server/test/integration/analysis/overrides_test.dart

Index: pkg/analysis_server/test/integration/analysis/overrides_test.dart
diff --git a/pkg/analysis_server/test/integration/analysis/overrides_test.dart b/pkg/analysis_server/test/integration/analysis/overrides_test.dart
index b5dfb6f5a83d03ba59b3ba58fd6fce42f23b15ba..12872c230d349cc71153a585fd9902548ddc3814 100644
--- a/pkg/analysis_server/test/integration/analysis/overrides_test.dart
+++ b/pkg/analysis_server/test/integration/analysis/overrides_test.dart
@@ -5,13 +5,13 @@
 library test.integration.analysis.overrides;
 
 import 'package:analysis_server/src/protocol.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 
-import '../../reflective_tests.dart';
 import '../integration_tests.dart';
 
 main() {
-  runReflectiveTests(Test);
+  defineReflectiveTests(Test);
 }
 
 @reflectiveTest