diff --git a/google/genai/_gaos/utils/values.py b/google/genai/_gaos/utils/values.py
index 066e1a332..799c6a29c 100644
--- a/google/genai/_gaos/utils/values.py
+++ b/google/genai/_gaos/utils/values.py
@@ -69,9 +69,11 @@ def match_status_codes(status_codes: List[str], status_code: int) -> bool:
 
 T = TypeVar("T")
 
+
 def cast_partial(typ):
     return partial(cast, typ)
 
+
 def get_global_from_env(
     value: Optional[T], env_key: str, type_cast: Callable[[str], T]
 ) -> Optional[T]: