diff --git a/pkg/compiler/test/end_to_end/trim_component_test.dart b/pkg/compiler/test/end_to_end/trim_component_test.dart
index 3673cbf8b91..025b1dbe6f5 100644
--- a/pkg/compiler/test/end_to_end/trim_component_test.dart
+++ b/pkg/compiler/test/end_to_end/trim_component_test.dart
@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.10
+
 import 'package:expect/expect.dart';
 import 'package:kernel/ast.dart' as ir;
 import 'package:kernel/binary/ast_from_binary.dart' show BinaryBuilder;