diff --git a/runtime/tests/vm/dart/regress_flutter51298_test.dart b/runtime/tests/vm/dart/regress_flutter51298_test.dart
index 68cddd9a0cb..f0b7a261f36 100644
--- a/runtime/tests/vm/dart/regress_flutter51298_test.dart
+++ b/runtime/tests/vm/dart/regress_flutter51298_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=2.19
+
 // VMOptions=--optimization_counter_threshold=10 --deterministic
 
 // Regression test for https://github.com/flutter/flutter/issues/51298.