diff --git a/fastapi/applications.py b/fastapi/applications.py
index c4fbfc4ca3..c468d58cc2 100644
--- a/fastapi/applications.py
+++ b/fastapi/applications.py
@@ -1008,8 +1008,10 @@ class FastAPI(Starlette):
         )
 
         # Starlette still has incorrect type specification for the handlers
-        self.exception_handlers.setdefault(WebSocketRequestValidationError, websocket_request_validation_exception_handler) # type: ignore
-
+        self.exception_handlers.setdefault(
+            WebSocketRequestValidationError,
+            websocket_request_validation_exception_handler,
+        )  # type: ignore
 
         self.user_middleware: list[Middleware] = (
             [] if middleware is None else list(middleware)