diff --git a/fastapi/_compat.py b/fastapi/_compat.py
index df7541316..a2eeee91a 100644
--- a/fastapi/_compat.py
+++ b/fastapi/_compat.py
@@ -624,7 +624,11 @@ def is_uploadfile_sequence_annotation(annotation: Any) -> bool:
                 continue
         return at_least_one
     args = get_args(annotation)
-    return field_annotation_is_sequence(annotation) and args and all(
-        is_uploadfile_or_nonable_uploadfile_annotation(sub_annotation)
-        for sub_annotation in args
+    return (
+        field_annotation_is_sequence(annotation)
+        and args
+        and all(
+            is_uploadfile_or_nonable_uploadfile_annotation(sub_annotation)
+            for sub_annotation in args
+        )
     )