diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index 531e708e8..4d78174fa 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -670,20 +670,24 @@ async def solve_dependencies(
         dependency_cache=dependency_cache,
     )
 
+
 if PYDANTIC_V2:
-    if sys.hexversion >= 0x30a00000:
+    if sys.hexversion >= 0x30A00000:
+
         def _allows_none(field: ModelField) -> bool:
             origin = get_origin(field.type_)
-            return (origin is Union or origin is types.UnionType) and type(None) in get_args(
-                field.type_
-            )
+            return (origin is Union or origin is types.UnionType) and type(
+                None
+            ) in get_args(field.type_)
     else:
+
         def _allows_none(field: ModelField) -> bool:
             origin = get_origin(field.type_)
             return origin is Union and type(None) in get_args(field.type_)
 else:
-        def _allows_none(field: ModelField) -> bool:
-            return field.allow_none
+
+    def _allows_none(field: ModelField) -> bool:
+        return field.allow_none
 
 
 def _validate_value_with_model_field(
diff --git a/tests/test_none_passed_when_null_received.py b/tests/test_none_passed_when_null_received.py
index c4ce6f8b7..51d3991f0 100644
--- a/tests/test_none_passed_when_null_received.py
+++ b/tests/test_none_passed_when_null_received.py
@@ -10,7 +10,7 @@ DEFAULT = 1234567890
 
 endpoints = []
 
-if sys.hexversion >= 0x30a0000:
+if sys.hexversion >= 0x30A0000:
     from typing import Annotated
 
     @app.post("/api1")