diff --git a/test/features/game_play_screen_test.dart b/test/features/game_play_screen_test.dart
index d6e292c..77ab9a8 100644
--- a/test/features/game_play_screen_test.dart
+++ b/test/features/game_play_screen_test.dart
@@ -6,12 +6,15 @@ import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 import '../helpers/mock_factories.dart';
+import '../helpers/test_setup.dart';
 
 /// 테스트용 MaterialApp 래퍼 (localization 포함)
+/// locale을 영어로 고정하여 테스트 텍스트와 일치시킴
 Widget _buildTestApp(Widget child) {
   return MaterialApp(
     localizationsDelegates: L10n.localizationsDelegates,
     supportedLocales: L10n.supportedLocales,
+    locale: const Locale('en'), // 영어 locale 고정
     home: child,
   );
 }
@@ -55,11 +58,37 @@ GameSessionController _createController() {
     progressService: MockFactories.createProgressService(),
     saveManager: FakeSaveManager(),
     tickInterval: const Duration(seconds: 10), // 느린 틱
+    hallOfFameStorage: FakeHallOfFameStorage(),
+    statisticsStorage: FakeStatisticsStorage(),
   );
 }
 
+/// 데스크톱 레이아웃 테스트를 위한 공통 설정
+Future<void> _setupDesktopLayoutTest(WidgetTester tester) async {
+  await tester.binding.setSurfaceSize(const Size(1200, 800));
+  addTearDown(() => tester.binding.setSurfaceSize(null));
+}
+
+/// 프레임 펌프 (localization 로드 대기)
+Future<void> _pumpFrames(WidgetTester tester) async {
+  await tester.pump();
+  await tester.pump(const Duration(milliseconds: 100));
+}
+
 void main() {
+  // SharedPreferences 모킹
+  setUpAll(() {
+    TestSetup.mockSharedPreferences();
+  });
+
+  // 각 테스트 후 싱글톤 서비스 정리 (타이머 누수 방지)
+  tearDown(() {
+    TestSetup.resetAllServices();
+  });
+
   testWidgets('GamePlayScreen renders 3-panel layout', (tester) async {
+    await _setupDesktopLayoutTest(tester);
+
     final controller = _createController();
     addTearDown(() async {
       await controller.pause(saveOnStop: false);
@@ -74,20 +103,23 @@ void main() {
       ),
     );
 
+    await _pumpFrames(tester);
+
     // AppBar 타이틀 확인 (L10n 사용) - ASCII NEVER DIE
     expect(find.textContaining('ASCII NEVER DIE'), findsOneWidget);
 
-    // 3패널 헤더 확인
-    expect(find.text('Character Sheet'), findsOneWidget);
-    expect(find.text('Equipment'), findsOneWidget);
-    expect(find.text('Plot Development'), findsOneWidget);
-    expect(find.text('Quests'), findsOneWidget);
+    // 3패널 헤더 확인 (패널 헤더는 대문자로 표시됨)
+    expect(find.text('CHARACTER SHEET'), findsOneWidget);
+    expect(find.text('EQUIPMENT'), findsOneWidget);
+    expect(find.text('PLOT DEVELOPMENT'), findsOneWidget);
+    expect(find.text('QUESTS'), findsOneWidget);
 
-    // 테스트 완료 후 정리
     await controller.pause(saveOnStop: false);
   });
 
   testWidgets('GamePlayScreen shows character traits', (tester) async {
+    await _setupDesktopLayoutTest(tester);
+
     final controller = _createController();
     addTearDown(() async {
       await controller.pause(saveOnStop: false);
@@ -102,8 +134,10 @@ void main() {
       ),
     );
 
-    // Traits 섹션 확인
-    expect(find.text('Traits'), findsOneWidget);
+    await _pumpFrames(tester);
+
+    // Traits 섹션 확인 (섹션 헤더는 대문자로 표시됨)
+    expect(find.text('TRAITS'), findsOneWidget);
     expect(find.text('TestHero'), findsOneWidget);
     expect(find.text('Elf'), findsOneWidget);
     expect(find.text('Mage'), findsOneWidget);
@@ -112,6 +146,8 @@ void main() {
   });
 
   testWidgets('GamePlayScreen shows stats', (tester) async {
+    await _setupDesktopLayoutTest(tester);
+
     final controller = _createController();
     addTearDown(() async {
       await controller.pause(saveOnStop: false);
@@ -126,8 +162,10 @@ void main() {
       ),
     );
 
-    // Stats 섹션 확인 (스크롤로 인해 화면 밖에 있을 수 있음)
-    expect(find.text('Stats'), findsOneWidget);
+    await _pumpFrames(tester);
+
+    // Stats 섹션 확인 (섹션 헤더는 대문자로 표시됨, 스크롤로 인해 화면 밖에 있을 수 있음)
+    expect(find.text('STATS', skipOffstage: false), findsOneWidget);
     expect(find.text('STR', skipOffstage: false), findsOneWidget);
     expect(find.text('CON', skipOffstage: false), findsOneWidget);
 
@@ -135,6 +173,8 @@ void main() {
   });
 
   testWidgets('GamePlayScreen shows current task caption', (tester) async {
+    await _setupDesktopLayoutTest(tester);
+
     final controller = _createController();
     addTearDown(() async {
       await controller.pause(saveOnStop: false);
@@ -149,6 +189,8 @@ void main() {
       ),
     );
 
+    await _pumpFrames(tester);
+
     // 현재 태스크 캡션 확인 (퀘스트 목록과 하단 패널에 표시됨)
     expect(find.text('Battling a Goblin'), findsAtLeast(1));
 
@@ -156,6 +198,8 @@ void main() {
   });
 
   testWidgets('GamePlayScreen shows progress bars', (tester) async {
+    await _setupDesktopLayoutTest(tester);
+
     final controller = _createController();
     addTearDown(() async {
       await controller.pause(saveOnStop: false);
@@ -170,8 +214,11 @@ void main() {
       ),
     );
 
-    // LinearProgressIndicator가 여러 개 표시되는지 확인
-    expect(find.byType(LinearProgressIndicator), findsAtLeast(4));
+    await _pumpFrames(tester);
+
+    // 프로그레스 바 관련 섹션 헤더 확인 (커스텀 세그먼트 프로그레스 바 사용)
+    expect(find.text('EXPERIENCE', skipOffstage: false), findsOneWidget);
+    expect(find.text('ENCUMBRANCE', skipOffstage: false), findsOneWidget);
 
     await controller.pause(saveOnStop: false);
   });