diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/design_runtime.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/design_runtime.rs
index 92952b610..14c1e9ec7 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/design_runtime.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/design_runtime.rs
@@ -870,7 +870,10 @@ pub(crate) fn debug_fast_forward_design_session(
     target_phase: String,
 ) -> Result<DesignRuntimeMode, String> {
     if !cfg!(debug_assertions)
-        || std::env::var("GENARRATIVE_AGC_DESIGN_DEBUG").ok().as_deref() != Some("1")
+        || std::env::var("GENARRATIVE_AGC_DESIGN_DEBUG")
+            .ok()
+            .as_deref()
+            != Some("1")
     {
         return Err("策划 Agent 快速推进仅可用于 Debug 构建".to_string());
     }
diff --git a/apps/ai-game-creator-shell/tests/designWorkspaceDebug.test.tsx b/apps/ai-game-creator-shell/tests/designWorkspaceDebug.test.tsx
index 5a29e9c6b..f5198b50e 100644
--- a/apps/ai-game-creator-shell/tests/designWorkspaceDebug.test.tsx
+++ b/apps/ai-game-creator-shell/tests/designWorkspaceDebug.test.tsx
@@ -18,10 +18,12 @@ vi.mock('../src/components/ChatMarkdownMessage', () => ({
 
 afterEach(() => {
   cleanup();
+  vi.unstubAllEnvs();
   delete window.__TAURI__;
 });
 
 it('prepares debug fixtures from the header and refreshes the phase and files without a manual refresh', async () => {
+  vi.stubEnv('VITE_GENARRATIVE_AGC_DESIGN_DEBUG', '1');
   let prepared = false;
   const invoke = vi.fn(async (command: string) => {
     if (command === 'debug_fast_forward_design_session') {