Use package:test_reflective_loader instead of reflective_tests.

pkg/analysis_server/test/services/correction/assist_test.dart

Index: pkg/analysis_server/test/services/correction/assist_test.dart
diff --git a/pkg/analysis_server/test/services/correction/assist_test.dart b/pkg/analysis_server/test/services/correction/assist_test.dart
index defd7098bb9f6f939231f5f665c7929cccce9181..da494b620d881dd05b5232cdcf1b2f192cc5009f 100644
--- a/pkg/analysis_server/test/services/correction/assist_test.dart
+++ b/pkg/analysis_server/test/services/correction/assist_test.dart
@@ -10,14 +10,14 @@ import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/correction/assist.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/plugin/plugin_impl.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 
 import '../../abstract_single_unit.dart';
-import '../../reflective_tests.dart';
 
 main() {
   groupSep = ' | ';
-  runReflectiveTests(AssistProcessorTest);
+  defineReflectiveTests(AssistProcessorTest);
 }
 
 @reflectiveTest