Use package:test_reflective_loader instead of reflective_tests.

pkg/analysis_server/test/edit/fixes_test.dart

Index: pkg/analysis_server/test/edit/fixes_test.dart
diff --git a/pkg/analysis_server/test/edit/fixes_test.dart b/pkg/analysis_server/test/edit/fixes_test.dart
index c51783e798e603932e9566c43d0a31a90d9e4d43..4267dfc479e25a76a3c444eebc2ce098b3c09d57 100644
--- a/pkg/analysis_server/test/edit/fixes_test.dart
+++ b/pkg/analysis_server/test/edit/fixes_test.dart
@@ -10,14 +10,14 @@ import 'package:analysis_server/src/edit/edit_domain.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analyzer/src/plugin/plugin_impl.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart' hide ERROR;
 
 import '../analysis_abstract.dart';
-import '../reflective_tests.dart';
 
 main() {
   groupSep = ' | ';
-  runReflectiveTests(FixesTest);
+  defineReflectiveTests(FixesTest);
 }
 
 @reflectiveTest