diff --git a/fastapi/routing.py b/fastapi/routing.py
index 29b29977b..24c5277d3 100644
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@@ -6,19 +6,19 @@ import json
 from contextlib import AsyncExitStack, asynccontextmanager
 from enum import Enum, IntEnum
 from typing import (
-    AsyncIterator,
     Any,
+    AsyncIterator,
     Callable,
     Coroutine,
     Dict,
     List,
+    Mapping,
     Optional,
     Sequence,
     Set,
     Tuple,
     Type,
     Union,
-    Mapping,
 )
 
 from fastapi import params
@@ -59,7 +59,7 @@ from starlette.routing import (
     websocket_session,
 )
 from starlette.status import WS_1008_POLICY_VIOLATION
-from starlette.types import ASGIApp, Lifespan, Scope, AppType
+from starlette.types import AppType, ASGIApp, Lifespan, Scope
 from starlette.websockets import WebSocket
 
 
diff --git a/tests/test_router_events.py b/tests/test_router_events.py
index 440b4b469..2b679ba64 100644
--- a/tests/test_router_events.py
+++ b/tests/test_router_events.py
@@ -120,7 +120,7 @@ def test_router_nested_lifespan_state(state: State) -> None:
         state.router_startup = True
         yield
         state.router_shutdown = True
-    
+
     @asynccontextmanager
     async def subrouter_lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
         state.sub_router_startup = True