Use package:test_reflective_loader instead of reflective_tests.

pkg/analysis_server/test/protocol_server_test.dart

Index: pkg/analysis_server/test/protocol_server_test.dart
diff --git a/pkg/analysis_server/test/protocol_server_test.dart b/pkg/analysis_server/test/protocol_server_test.dart
index 26aae555a284f5ca04f3772d09ae008a80cbd1b4..129c8cc3ccbc50135db8ced51d6d9da3eeb055da 100644
--- a/pkg/analysis_server/test/protocol_server_test.dart
+++ b/pkg/analysis_server/test/protocol_server_test.dart
@@ -13,19 +13,19 @@ import 'package:analyzer/src/generated/ast.dart' as engine;
 import 'package:analyzer/src/generated/element.dart' as engine;
 import 'package:analyzer/src/generated/error.dart' as engine;
 import 'package:analyzer/src/generated/source.dart' as engine;
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:typed_mock/typed_mock.dart';
 import 'package:unittest/unittest.dart';
 
 import 'abstract_context.dart';
 import 'mocks.dart';
-import 'reflective_tests.dart';
 
 main() {
   groupSep = ' | ';
-  runReflectiveTests(AnalysisErrorTest);
-  runReflectiveTests(ElementTest);
-  runReflectiveTests(ElementKindTest);
-  runReflectiveTests(EnumTest);
+  defineReflectiveTests(AnalysisErrorTest);
+  defineReflectiveTests(ElementTest);
+  defineReflectiveTests(ElementKindTest);
+  defineReflectiveTests(EnumTest);
 }
 
 class AnalysisErrorMock extends TypedMock implements engine.AnalysisError {