diff --git a/5_django_backend/apps/gateway/views.py b/5_django_backend/apps/gateway/views.py
index 09612e5..9da7e05 100644
--- a/5_django_backend/apps/gateway/views.py
+++ b/5_django_backend/apps/gateway/views.py
@@ -102,7 +102,9 @@ def _observe(model_id: str, body: dict, col: _Collect, started: float, status: i
     u = col.usage or {}
     tid = str(uuid.uuid4())
     t0 = datetime.fromtimestamp(started, timezone.utc).isoformat()
-    root = langfuse.trace(tid, "fabrix", tags=["gateway"], metadata={"parts": kinds}, start=t0, end=langfuse.now_iso())
+    last_user = next((m.get("content") for m in reversed(body.get("messages") or []) if m.get("role") == "user"), None)
+    root = langfuse.trace(tid, "fabrix", tags=["gateway"], metadata={"parts": kinds}, start=t0, end=langfuse.now_iso(),
+                          input=last_user, output="".join(col.text))  # 목록에서 뭘 물었는지 바로 보이게
     langfuse.send_later([
         root,
         langfuse.generation(
diff --git a/5_django_backend/tests/conftest.py b/5_django_backend/tests/conftest.py
index 0c5e83e..ec7ee64 100644
--- a/5_django_backend/tests/conftest.py
+++ b/5_django_backend/tests/conftest.py
@@ -24,3 +24,9 @@ def auth_api(api, user):
     api.credentials(HTTP_AUTHORIZATION=f"Bearer {tokens['token']}")
     api.tokens = tokens
     return api
+
+
+@pytest.fixture(autouse=True)
+def _no_langfuse(settings):
+    """테스트가 로컬 .env 의 LANGFUSE_HOST 로 진짜 전송하는 사고 방지. 보내는 테스트는 override_settings 로 켬."""
+    settings.LANGFUSE = {"host": "", "public_key": "", "secret_key": ""}