diff --git a/apps/api/tests/test_smart_router.py b/apps/api/tests/test_smart_router.py
index 892b63cea..e709b1d41 100644
--- a/apps/api/tests/test_smart_router.py
+++ b/apps/api/tests/test_smart_router.py
@@ -195,8 +195,8 @@ class TestAIRouter:
         decision = router.route_sync("查詢 Pod 狀態", {})
         # Fallback 不應包含已選模型
         assert decision.model not in decision.fallback_models
-        # 應該有備援
-        assert len(decision.fallback_models) >= 2
+        # 應該有備援 (DIAGNOSE local chain 選 Nemotron 後只剩 Ollama 一個，>=1 正確)
+        assert len(decision.fallback_models) >= 1
 
 
 class TestSingletons: