diff --git a/fastapi/security/oauth2.py b/fastapi/security/oauth2.py
index 99fa1d829..494b8a5f0 100644
--- a/fastapi/security/oauth2.py
+++ b/fastapi/security/oauth2.py
@@ -1,17 +1,16 @@
 from typing import Any, Dict, List, Optional, Union, cast
 
-from starlette.requests import Request
-from starlette.status import HTTP_401_UNAUTHORIZED, HTTP_403_FORBIDDEN
-
-# TODO: import from typing when deprecating Python 3.9
-from typing_extensions import Annotated, Doc
-
 from fastapi.exceptions import HTTPException
 from fastapi.openapi.models import OAuth2 as OAuth2Model
 from fastapi.openapi.models import OAuthFlows as OAuthFlowsModel
 from fastapi.param_functions import Form
 from fastapi.security.base import SecurityBase
 from fastapi.security.utils import get_authorization_scheme_param
+from starlette.requests import Request
+from starlette.status import HTTP_401_UNAUTHORIZED, HTTP_403_FORBIDDEN
+
+# TODO: import from typing when deprecating Python 3.9
+from typing_extensions import Annotated, Doc
 
 
 class OAuth2PasswordRequestForm:
@@ -726,9 +725,7 @@ class SecurityScopes:
                 The list of all the scopes required by dependencies.
                 """
             ),
-        ] = (
-            scopes or []
-        )
+        ] = scopes or []
         self.scope_str: Annotated[
             str,
             Doc(