diff --git a/webdev/pubspec.yaml b/webdev/pubspec.yaml
index 1847bfb1f..b90ca4480 100644
--- a/webdev/pubspec.yaml
+++ b/webdev/pubspec.yaml
@@ -43,7 +43,7 @@ dependencies:
 dev_dependencies:
   build: ^2.0.0
   build_runner: ^2.0.0
-  build_verify: ^2.0.0
+  build_verify: ^3.0.0
   build_version: ^2.0.0
   test: ^1.15.0
   test_descriptor: ^2.0.0
diff --git a/webdev/test/build/ensure_build_test.dart b/webdev/test/build/ensure_build_test.dart
index 3de76c81c..599556d7d 100644
--- a/webdev/test/build/ensure_build_test.dart
+++ b/webdev/test/build/ensure_build_test.dart
@@ -2,8 +2,6 @@
 // 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 = 2.9
-
 @TestOn('vm')
 @OnPlatform({
   'windows': Skip('https://github.com/dart-lang/webdev/issues/711'),
@@ -12,6 +10,9 @@ import 'package:build_verify/build_verify.dart';
 import 'package:test/test.dart';
 
 void main() {
-  test('ensure_build',
-      () => expectBuildClean(packageRelativeDirectory: 'webdev'));
+  test(
+    'ensure_build',
+    () => expectBuildClean(packageRelativeDirectory: 'webdev'),
+    timeout: const Timeout.factor(2),
+  );
 }