diff --git a/apps/api/tests/test_p0_diagnose_routing.py b/apps/api/tests/test_p0_diagnose_routing.py
index 76bcf996..044b7f10 100644
--- a/apps/api/tests/test_p0_diagnose_routing.py
+++ b/apps/api/tests/test_p0_diagnose_routing.py
@@ -140,15 +140,20 @@ class TestLocalFallbackChain:
 
 
 class TestDiagnoseIntentOverride:
-    """DIAGNOSE intent 應優先路由至 Nemotron（非 FORCE_LOCAL 情境）"""
+    """DIAGNOSE intent 路由設定驗證"""
 
-    def test_diagnose_override_is_nemotron(self):
-        """_intent_provider_overrides[DIAGNOSE] 應為 NEMOTRON"""
-        from src.services.ai_router import AIRouter, AIProviderEnum
+    def test_diagnose_override_is_none(self):
+        """_intent_provider_overrides[DIAGNOSE] 應為 None（複雜度路由）
+
+        2026-04-12 ogt: NEMOTRON routing 暫停 — NIM tool_call 無 confidence 欄位
+        導致 confidence=0.0，待 NemotronProvider._parse_confidence() 修復後恢復。
+        目前 DIAGNOSE 走複雜度路由（Gemini/openclaw_nemo 處理）。
+        """
+        from src.services.ai_router import AIRouter
         from src.services.intent_classifier import IntentType
 
         router = AIRouter()
         override = router._intent_provider_overrides.get(IntentType.DIAGNOSE)
-        assert override == AIProviderEnum.NEMOTRON, (
-            f"DIAGNOSE 應路由至 NEMOTRON，實際為 {override}"
+        assert override is None, (
+            f"DIAGNOSE 應為 None（複雜度路由），實際為 {override}"
         )