diff --git a/docs/en/docs/how-to/custom-request-and-route.md b/docs/en/docs/how-to/custom-request-and-route.md
index 8ff07077c..a47a64291 100644
--- a/docs/en/docs/how-to/custom-request-and-route.md
+++ b/docs/en/docs/how-to/custom-request-and-route.md
@@ -128,7 +128,7 @@ This example enhances FastAPI with structured routing and response timing, makin
 ##### 📌 API Structure
 - **`/healthz`**: Health check endpoint for the main router. it path name is `Global.health-check`.
 - **`/model/create`**: Model creation endpoint for the model router with path name `Model.create`.
-- **`/model/{model_id}/item/create`**: Item creation endpoint for the item router and its child router of model 
+- **`/model/{model_id}/item/create`**: Item creation endpoint for the item router and its child router of model
   router with path name `Model.Item.create`.
 ##### 🔥 Benefits
 
@@ -138,4 +138,4 @@ This example enhances FastAPI with structured routing and response timing, makin
 
 This setup is **ideal for scalable FastAPI projects**, ensuring better organization and easier debugging.
 
-{* ../../docs_src/custom_api_router/tutorial001.py hl[93:120,30:36] *}
\ No newline at end of file
+{* ../../docs_src/custom_api_router/tutorial001.py hl[93:120,30:36] *}
diff --git a/docs_src/custom_api_router/tutorial001.py b/docs_src/custom_api_router/tutorial001.py
index 3714812cc..d889c7a52 100644
--- a/docs_src/custom_api_router/tutorial001.py
+++ b/docs_src/custom_api_router/tutorial001.py
@@ -110,6 +110,7 @@ app = FastAPI(route_class=TimedRoute, router_class=AppRouter)
 model = AppRouter(prefix="/model", name="Model", route_class=TimedRoute)
 item = AppRouter(prefix="/{model_id}/item", name="Item", route_class=TimedRoute)
 
+
 async def create_model(request: Request):
     """
     Create a model
@@ -117,12 +118,21 @@ async def create_model(request: Request):
     print("Model created")
     route: TimedRoute = request.scope["route"]
     router: AppRouter = request.scope["router"]
-    return JSONResponse({"route_class": route.__class__.__name__, "route_name": route.name, "router_class": router.__class__.__name__}, status_code=200)
+    return JSONResponse(
+        {
+            "route_class": route.__class__.__name__,
+            "route_name": route.name,
+            "router_class": router.__class__.__name__,
+        },
+        status_code=200,
+    )
+
 
 model.add_api_route(
     path="/create", endpoint=create_model, methods=["POST"], name="create-model"
 )
 
+
 async def create_item(request: Request):
     """
     Create an item
@@ -131,8 +141,14 @@ async def create_item(request: Request):
     route: TimedRoute = request.scope["route"]
     router: AppRouter = request.scope["router"]
     return JSONResponse(
-        {"route_class": route.__class__.__name__, "route_name": route.name, "router_class": router.__class__.__name__},
-        status_code=200)
+        {
+            "route_class": route.__class__.__name__,
+            "route_name": route.name,
+            "router_class": router.__class__.__name__,
+        },
+        status_code=200,
+    )
+
 
 item.add_api_route(
     path="/create", endpoint=create_item, methods=["POST"], name="create-item"
diff --git a/tests/test_tutorial/test_custom_request_and_route/test_tutorial004.py b/tests/test_tutorial/test_custom_request_and_route/test_tutorial004.py
index ca427376b..da451fa8c 100644
--- a/tests/test_tutorial/test_custom_request_and_route/test_tutorial004.py
+++ b/tests/test_tutorial/test_custom_request_and_route/test_tutorial004.py
@@ -13,22 +13,29 @@ from docs_src.custom_api_router.tutorial001 import app
 
 client = TestClient(app)
 
+
 def test_get_timed():
     response = client.get("/healthz")
     assert response.text == "OK"
     assert "X-Response-Time" in response.headers
     assert float(response.headers["X-Response-Time"]) >= 0
 
+
 def test_route_class():
-    response = client.post("/model/create", json={"name": "test", "description": "test"})
+    response = client.post(
+        "/model/create", json={"name": "test", "description": "test"}
+    )
     assert response.status_code == 200
     response_json = response.json()
     assert response_json["route_name"] == "Global.Model.create-model"
     assert response_json["route_class"] == "TimedRoute"
     assert response_json["router_class"] == "AppRouter"
 
+
 def test_route_name():
-    response = client.post("/model/Model001/item/create", json={"name": "test", "description": "test"})
+    response = client.post(
+        "/model/Model001/item/create", json={"name": "test", "description": "test"}
+    )
     assert response.status_code == 200
     response_json = response.json()
     assert response_json["route_name"] == "Global.Model.Item.create-item"