diff --git a/tests/test_router.py b/tests/test_router.py
index a94ae59..7142ed1 100644
--- a/tests/test_router.py
+++ b/tests/test_router.py
@@ -111,10 +111,8 @@ class TestAgentHandoff:
         # 不应该走 handoff，应该走 assignee 直派或其他
         assert d.mode != "agent_handoff"
 
-    def test_handoff_known_but_no_match(self, router):
+    def test_handoff_known_but_no_match(self):
         """合法 capability 但无匹配 Agent → 降级"""
-        # "escalation" 只有 pangtong 有，如果排除 pangton... 
-        # 测试 "data" 有 zhaoyun 但 zhaoyun 不在 profiles 里
         router2 = AgentRouter(agent_profiles={
             "zhangfei-dev": AgentProfile(
                 agent_id="zhangfei-dev",
@@ -122,10 +120,11 @@ class TestAgentHandoff:
             ),
         })
         d = router2.route(make_task(
+            assignee=None,  # 无 assignee，不会走快速路径 4
             current_agent="zhangfei-dev",
             next_capability="review",  # 合法但在 profiles 中无人匹配
         ))
-        # 无 LLM driver → fallback
+        # 无 LLM driver、无 assignee → fallback 庞统
         assert d.agent_id == "pangtong-fujunshi"
         assert d.mode == "fallback"