diff --git a/tests/test_e2e_v27.py b/tests/test_e2e_v27.py
index ac968ba..a8b0ab7 100644
--- a/tests/test_e2e_v27.py
+++ b/tests/test_e2e_v27.py
@@ -728,6 +728,34 @@ def _cleanup_project(pid: str):
         pass
 
 
+def _poll_task(pid, tid, timeout, terminal_states=None):
+    """轮询任务状态直到终态或超时"""
+    terminal = terminal_states or ("done", "failed", "cancelled")
+    deadline = time.time() + timeout
+    last_status = None
+    while time.time() < deadline:
+        try:
+            resp = http_requests.get(
+                f"{API_BASE}/api/projects/{pid}/tasks/{tid}", timeout=10
+            )
+            if resp.status_code == 200:
+                data = resp.json()
+                last_status = data.get("status")
+                if last_status in terminal:
+                    return data
+        except Exception:
+            pass
+        time.sleep(POLL_INTERVAL)
+    # 超时，返回最后状态
+    try:
+        resp = http_requests.get(
+            f"{API_BASE}/api/projects/{pid}/tasks/{tid}", timeout=10
+        )
+        return resp.json() if resp.status_code == 200 else {"status": "unknown"}
+    except Exception:
+        return {"status": "unknown"}
+
+
 @pytest.mark.integration
 @pytest.mark.skipif(not os.environ.get("RUN_INTEGRATION"),
                     reason="Set RUN_INTEGRATION=1 to run real agent tests")