diff --git a/apps/ai-game-creator-shell/tests/appSurface/chat-composer.suite.ts b/apps/ai-game-creator-shell/tests/appSurface/chat-composer.suite.ts
index a01a07d3f..d84899d39 100644
--- a/apps/ai-game-creator-shell/tests/appSurface/chat-composer.suite.ts
+++ b/apps/ai-game-creator-shell/tests/appSurface/chat-composer.suite.ts
@@ -404,7 +404,10 @@ export function registerChatComposerControlTests() {
         throw new Error('authentication-required');
       },
     });
-    const refresh = vi.spyOn(platformSession, 'requestPlatformSessionRefresh');
+    // 桩掉实现：真回归（回合期间误调保活刷新）时以 mock 结果干净失败，不在测试里发起真实刷新。
+    const refresh = vi
+      .spyOn(platformSession, 'requestPlatformSessionRefresh')
+      .mockResolvedValue({ status: 'stale' });
     try {
       const composer = within(surface).getByLabelText('陶泥儿对话内容');
       await submitDirectTurn(surface, composer, '继续制作');