diff --git a/mail/libraries/lite_to_edifact_converter.py b/mail/libraries/lite_to_edifact_converter.py
index 60173294..c6cb0919 100644
--- a/mail/libraries/lite_to_edifact_converter.py
+++ b/mail/libraries/lite_to_edifact_converter.py
@@ -13,7 +13,7 @@
     LicenceActionEnum,
     LicenceTypeEnum,
     UnitMapping,
-    LegacyUnitCodeMapping
+    LegacyUnitCodeMapping,
 )
 from mail.libraries import chiefprotocol, chieftypes
 from mail.libraries.edifact_validator import (
diff --git a/mail/tests/test_enums.py b/mail/tests/test_enums.py
index 0aeff3d3..2dc0378e 100644
--- a/mail/tests/test_enums.py
+++ b/mail/tests/test_enums.py
@@ -56,3 +56,4 @@ def test_serializer_choices_old(self):
         expected = ["MIM", "MCM", "MIR", "MCR"]
 
         self.assertEqual(choices, expected)
+