Use package:test_reflective_loader instead of reflective_tests.

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

Index: pkg/analysis_server/test/integration/analysis/error_test.dart
diff --git a/pkg/analysis_server/test/integration/analysis/error_test.dart b/pkg/analysis_server/test/integration/analysis/error_test.dart
index 2a76f3d31f4cf15bf94b114439d3c26ae267658f..733754512b4d7199fcba75a8919d34493a3d171b 100644
--- a/pkg/analysis_server/test/integration/analysis/error_test.dart
+++ b/pkg/analysis_server/test/integration/analysis/error_test.dart
@@ -5,13 +5,13 @@
 library test.integration.analysis.error;
 
 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(AnalysisErrorIntegrationTest);
+  defineReflectiveTests(AnalysisErrorIntegrationTest);
 }
 
 @reflectiveTest