diff --git a/tests/unit/test_kwargs/test_multipart_data.py b/tests/unit/test_kwargs/test_multipart_data.py
index bbf7b8dff3..9b2d295f6a 100644
--- a/tests/unit/test_kwargs/test_multipart_data.py
+++ b/tests/unit/test_kwargs/test_multipart_data.py
@@ -296,7 +296,7 @@ def test_multipart_request_without_charset_for_filename() -> None:
         }
 
 
-@pytest.mark.xfail
+@pytest.mark.xfail(reason="filename* is deprecated and should not be used according to RFC-7578")
 def test_multipart_request_with_asterisks_filename() -> None:
     with create_test_client(form_handler) as client:
         response = client.post(