diff --git a/apps/ai-game-creator-shell/tests/unhandledRejectionBridge.ts b/apps/ai-game-creator-shell/tests/unhandledRejectionBridge.ts
index 85dc4c24e..c61cabea4 100644
--- a/apps/ai-game-creator-shell/tests/unhandledRejectionBridge.ts
+++ b/apps/ai-game-creator-shell/tests/unhandledRejectionBridge.ts
@@ -10,11 +10,31 @@
  * 有人接手；没人读说明这条拒绝是意外的，交回安装前的监听器（含 vitest 的失败上报），
  * 不会被静默吞掉。
  *
+ * 安装前用 `rawListeners` 取原始监听器：`process.once` 注册的包装（`.listener`）在拆卸时
+ * 按 `once` 装回去，不会退化成每次拒绝都触发的普通监听器；安装期间新增的监听器仍排在
+ * 恢复出来的监听器之前。
+ *
  * 用法：用例内 `const uninstall = installUnhandledRejectionBridge()`，在 `finally` 或
  * `afterEach` 里 `uninstall()`。
  */
+type RejectionListener = (reason: unknown, promise: Promise<unknown>) => void;
+type RawRejectionListener = RejectionListener & {
+  listener?: RejectionListener;
+};
+
+function invokeRejectionListener(
+  listener: RawRejectionListener,
+  reason: unknown,
+  promise: Promise<unknown>,
+) {
+  // once 包装必须调它包裹的原函数：脱离 emitter 直接调用包装会碰到 this 为空。
+  (listener.listener ?? listener)(reason, promise);
+}
+
 export function installUnhandledRejectionBridge() {
-  const originalListeners = process.listeners('unhandledRejection');
+  const originalListeners = process.rawListeners(
+    'unhandledRejection',
+  ) as RawRejectionListener[];
   process.removeAllListeners('unhandledRejection');
   const handleRejection = (reason: unknown, promise: Promise<unknown>) => {
     let consumed = false;
@@ -28,7 +48,7 @@ export function installUnhandledRejectionBridge() {
     window.dispatchEvent(event);
     if (!consumed) {
       for (const listener of originalListeners) {
-        listener(reason, promise);
+        invokeRejectionListener(listener, reason, promise);
       }
     }
   };
@@ -36,7 +56,11 @@ export function installUnhandledRejectionBridge() {
   return () => {
     process.removeListener('unhandledRejection', handleRejection);
     for (const listener of originalListeners) {
-      process.on('unhandledRejection', listener);
+      if (listener.listener) {
+        process.once('unhandledRejection', listener.listener);
+      } else {
+        process.on('unhandledRejection', listener);
+      }
     }
   };
 }