diff --git a/koku/sources/test/test_kafka_message_processor.py b/koku/sources/test/test_kafka_message_processor.py
index c93026d099..20d8c39699 100644
--- a/koku/sources/test/test_kafka_message_processor.py
+++ b/koku/sources/test/test_kafka_message_processor.py
@@ -263,7 +263,7 @@ def test_create_msg_processor_various_headers_failures(self):
                 "header_list": (
                     ("event_type", bytes(event, encoding="utf-8")),
                     ("x-rh-identity", bytes(header_missing_account_number, encoding="utf-8")),
-                    ("x-rh-sources-account-number", b''),
+                    ("x-rh-sources-account-number", b""),
                 )
             },
         ]