diff --git a/demo_app/lib/screens/wordpress.dart b/demo_app/lib/screens/wordpress.dart
index b6b3ed1e8..60d039fd1 100644
--- a/demo_app/lib/screens/wordpress.dart
+++ b/demo_app/lib/screens/wordpress.dart
@@ -160,7 +160,7 @@ class _PostsState extends State<_PostsList> {
     );
   }
 
-  List<_Post> _parseJson(json) {
+  List<_Post> _parseJson(dynamic json) {
     final posts = <_Post>[];
     if (json is List) {
       for (final postJson in json) {
diff --git a/packages/core/test/core_config_test.dart b/packages/core/test/core_config_test.dart
index 0ab104561..b0ed61268 100644
--- a/packages/core/test/core_config_test.dart
+++ b/packages/core/test/core_config_test.dart
@@ -522,7 +522,7 @@ void main() {
         _OnTapUrlApp(
           href: href,
           onTapCallbackResults: onTapCallbackResults,
-          onTapUrl: (_) async => false,
+          onTapUrl: (_) => false,
         ),
       );
       await tester.pumpAndSettle();
@@ -539,7 +539,7 @@ void main() {
         _OnTapUrlApp(
           href: href,
           onTapCallbackResults: onTapCallbackResults,
-          onTapUrl: (_) async => true,
+          onTapUrl: (_) => true,
         ),
       );
       await tester.pumpAndSettle();
diff --git a/packages/enhanced/test/_.dart b/packages/enhanced/test/_.dart
index 58c1fc614..49543b812 100644
--- a/packages/enhanced/test/_.dart
+++ b/packages/enhanced/test/_.dart
@@ -37,7 +37,7 @@ Future<String> explain(
   Widget? hw,
   GlobalKey? key,
   bool useExplainer = true,
-}) async {
+}) {
   key ??= helper.hwKey;
   return helper.explain(
     tester,
diff --git a/packages/enhanced/test/config_test.dart b/packages/enhanced/test/config_test.dart
index 0dfaaf8be..ba9d5b578 100644
--- a/packages/enhanced/test/config_test.dart
+++ b/packages/enhanced/test/config_test.dart
@@ -508,7 +508,7 @@ void main() {
         tester,
         HtmlWidget(
           '<a href="$href">Tap me</a>',
-          onTapUrl: (url) async {
+          onTapUrl: (url) {
             urls.add(url);
             return false;
           },
@@ -529,7 +529,7 @@ void main() {
         tester,
         HtmlWidget(
           '<a href="$href">Tap me</a>',
-          onTapUrl: (url) async {
+          onTapUrl: (url) {
             urls.add(url);
             return true;
           },
diff --git a/packages/fwfh_just_audio/test/_.dart b/packages/fwfh_just_audio/test/_.dart
index 5cb77b498..d74948091 100644
--- a/packages/fwfh_just_audio/test/_.dart
+++ b/packages/fwfh_just_audio/test/_.dart
@@ -22,7 +22,7 @@ Future<String> explain(
   WidgetTester tester,
   String html, {
   bool useExplainer = true,
-}) async =>
+}) =>
     helper.explain(
       tester,
       null,
diff --git a/packages/fwfh_svg/test/_.dart b/packages/fwfh_svg/test/_.dart
index 78899527a..19b8a54c9 100644
--- a/packages/fwfh_svg/test/_.dart
+++ b/packages/fwfh_svg/test/_.dart
@@ -27,7 +27,7 @@ Future<String> explain(
   WidgetTester tester,
   String html, {
   bool useExplainer = true,
-}) async =>
+}) =>
     helper.explain(
       tester,
       null,
diff --git a/packages/fwfh_url_launcher/test/_.dart b/packages/fwfh_url_launcher/test/_.dart
index c0e517f16..d467fec8b 100644
--- a/packages/fwfh_url_launcher/test/_.dart
+++ b/packages/fwfh_url_launcher/test/_.dart
@@ -6,7 +6,7 @@ import '../../core/test/_.dart' as helper;
 
 const tapText = helper.tapText;
 
-Future<String> explain(WidgetTester tester, String html) async =>
+Future<String> explain(WidgetTester tester, String html) =>
     helper.explain(
       tester,
       null,
diff --git a/packages/fwfh_webview/test/_.dart b/packages/fwfh_webview/test/_.dart
index 1bb996034..457200b49 100644
--- a/packages/fwfh_webview/test/_.dart
+++ b/packages/fwfh_webview/test/_.dart
@@ -45,7 +45,7 @@ Future<String> explain(
   String html, {
   Uri? baseUrl,
   bool useExplainer = true,
-}) async =>
+}) =>
     helper.explain(
       tester,
       null,
diff --git a/packages/fwfh_webview/test/mock_webview_platform.dart b/packages/fwfh_webview/test/mock_webview_platform.dart
index eed4651f7..2261f2e03 100644
--- a/packages/fwfh_webview/test/mock_webview_platform.dart
+++ b/packages/fwfh_webview/test/mock_webview_platform.dart
@@ -74,7 +74,7 @@ abstract class FakeWebViewController extends PlatformWebViewController {
   FutureOr<NavigationDecision?> onNavigationRequest({
     required String url,
     required bool isMainFrame,
-  }) async {
+  }) {
     final req = NavigationRequest(url: url, isMainFrame: isMainFrame);
     return _handler?._onNavigationRequest?.call(req);
   }