diff --git a/fastapi/dependencies/models.py b/fastapi/dependencies/models.py
index d0783c8f0..3d3567d03 100644
--- a/fastapi/dependencies/models.py
+++ b/fastapi/dependencies/models.py
@@ -33,7 +33,9 @@ class Dependant:
     use_cache: bool = True
     path: Optional[str] = None
     scope: Literal["function", "request"] = "request"
-    cache_key: Tuple[Optional[Callable[..., Any]], Tuple[str, ...], str] = field(init=False)
+    cache_key: Tuple[Optional[Callable[..., Any]], Tuple[str, ...], str] = field(
+        init=False
+    )
 
     def __post_init__(self) -> None:
         self.cache_key = (
diff --git a/fastapi/exceptions.py b/fastapi/exceptions.py
index ca889c7cb..0620428be 100644
--- a/fastapi/exceptions.py
+++ b/fastapi/exceptions.py
@@ -153,6 +153,7 @@ class DependencyScopeError(FastAPIError):
     (narrower) scope.
     """
 
+
 class ValidationException(Exception):
     def __init__(self, errors: Sequence[Any]) -> None:
         self._errors = errors