diff --git a/lib/screens/settings.dart b/lib/screens/settings.dart
index d8cd3ca..dc209d5 100644
--- a/lib/screens/settings.dart
+++ b/lib/screens/settings.dart
@@ -27,7 +27,7 @@ class _GameSettingsState extends State<GameSettings> {
       appBar: AppBar(
         title: Text(
           "Werwolf",
-          style: Theme.of(context).textTheme.titleLarge, // Apply text theme
+          style: Theme.of(context).textTheme.titleLarge, 
         ),
         centerTitle: true,
       ),
@@ -37,7 +37,7 @@ class _GameSettingsState extends State<GameSettings> {
           children: [
             Text(
               "Anzahl der Spieler   ${widget.playernames.length}",
-              style: Theme.of(context).textTheme.titleLarge, // Apply text theme
+              style: Theme.of(context).textTheme.titleLarge, 
             ),
             const Divider(
               height: 60,
@@ -49,7 +49,7 @@ class _GameSettingsState extends State<GameSettings> {
                 Text(
                   "Anzahl der Werwölfe   ${game.getWolves()}",
                   style:
-                      Theme.of(context).textTheme.bodyLarge, // Apply text theme
+                      Theme.of(context).textTheme.bodyLarge, 
                 ),
                 IconButton(
                   onPressed: () {
@@ -77,7 +77,7 @@ class _GameSettingsState extends State<GameSettings> {
               child: Text(
                 "Spezielle Rollen",
                 style:
-                    Theme.of(context).textTheme.titleLarge, // Apply text theme
+                    Theme.of(context).textTheme.titleLarge, 
               ),
             ),
             Expanded(
@@ -92,7 +92,7 @@ class _GameSettingsState extends State<GameSettings> {
                         role.stringValue,
                         style: Theme.of(context)
                             .textTheme
-                            .bodyLarge, // Apply text theme
+                            .bodyLarge, 
                       ),
                       trailing: Switch(
                         value: game.specialRoles[role],
diff --git a/pubspec.lock b/pubspec.lock
index 53007e5..36ac543 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -481,5 +481,5 @@ packages:
     source: hosted
     version: "3.1.2"
 sdks:
-  dart: ">=3.3.0 <4.0.0"
+  dart: ">=3.4.3 <4.0.0"
   flutter: ">=3.18.0-18.0.pre.54"
diff --git a/pubspec.yaml b/pubspec.yaml
index 4316417..ff4f1fb 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: 'none'
 version: 1.0.0
 
 environment:
-  sdk: '>=3.0.0-313.0.dev <4.0.0'
+  sdk: '>=3.4.3 <4.0.0'
 
 dependencies:
   flip_card: ^0.7.0
@@ -20,5 +20,3 @@ dev_dependencies:
 
 flutter:
   uses-material-design: true
-
-
diff --git a/test/gameboard_test..dart b/test/gameboard_test.dart
similarity index 100%
rename from test/gameboard_test..dart
rename to test/gameboard_test.dart
diff --git a/test/playerregistry_test.dart b/test/playerregistry_test.dart
index 3245fa9..a6916fb 100644
--- a/test/playerregistry_test.dart
+++ b/test/playerregistry_test.dart
@@ -6,7 +6,7 @@ import 'package:werwolf/screens/settings.dart';
 void main() {
   group('PlayerRegistry Tests', () {
     testWidgets('Adds a player to the list', (WidgetTester tester) async {
-      await tester.pumpWidget(MaterialApp(home: PlayerRegistry()));
+      await tester.pumpWidget(const MaterialApp(home: PlayerRegistry()));
 
       await tester.enterText(find.byType(TextField), 'Alice');
       await tester.testTextInput.receiveAction(TextInputAction.done);
@@ -16,7 +16,7 @@ void main() {
     });
 
     testWidgets('Shows error for duplicate player', (WidgetTester tester) async {
-      await tester.pumpWidget(MaterialApp(home: PlayerRegistry()));
+      await tester.pumpWidget(const MaterialApp(home: PlayerRegistry()));
 
       await tester.enterText(find.byType(TextField), 'Alice');
       await tester.testTextInput.receiveAction(TextInputAction.done);
@@ -30,7 +30,7 @@ void main() {
     });
 
     testWidgets('Navigates to GameSettings when enough players are added', (WidgetTester tester) async {
-      await tester.pumpWidget(MaterialApp(home: PlayerRegistry()));
+      await tester.pumpWidget(const MaterialApp(home: PlayerRegistry()));
 
       for (int i = 0; i < 6; i++) {
         await tester.enterText(find.byType(TextField), 'Player $i');