diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index 50c6a5747..2eff34a15 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -780,7 +780,9 @@ def request_params_to_args(
             # Handle fields extracted from a Pydantic Model for a header, each field
             # doesn't have a FieldInfo of type Header with the default convert_underscores=True
             convert_underscores = getattr(
-                parent_field.field_info, "convert_underscores", default_convert_underscores
+                parent_field.field_info,
+                "convert_underscores",
+                default_convert_underscores,
             )
             if convert_underscores:
                 alias = get_validation_alias(field)
diff --git a/tests/test_multiple_params_models.py b/tests/test_multiple_params_models.py
index f8d7c8b8d..021a6b944 100644
--- a/tests/test_multiple_params_models.py
+++ b/tests/test_multiple_params_models.py
@@ -1,10 +1,9 @@
-from typing import Any, Callable
+from typing import Annotated, Any, Callable
 
 import pytest
 from fastapi import APIRouter, Cookie, FastAPI, Header, Query, status
 from fastapi.testclient import TestClient
 from pydantic import BaseModel
-from typing_extensions import Annotated
 
 app = FastAPI()
 client = TestClient(app)