3 files changed, 6 insertions, 6 deletions

diff --git a/src/mailman/rest/members.py b/src/mailman/rest/members.py
index 197e2232b..11ad17c14 100644
--- a/src/mailman/rest/members.py
+++ b/src/mailman/rest/members.py
@@ -167,7 +167,7 @@ class AMember(_MemberBase):
             values = Validator(
                 address=str,
                 delivery_mode=enum_validator(DeliveryMode),
-                moderation_action=enum_validator(Action, allow_none=True),
+                moderation_action=enum_validator(Action, allow_blank=True),
                 _optional=('address', 'delivery_mode', 'moderation_action'),
                 )(request)
         except ValueError as error:
diff --git a/src/mailman/rest/tests/test_validator.py b/src/mailman/rest/tests/test_validator.py
index 734ec0399..32ba7a845 100644
--- a/src/mailman/rest/tests/test_validator.py
+++ b/src/mailman/rest/tests/test_validator.py
@@ -89,5 +89,5 @@ class TestValidators(unittest.TestCase):
         self.assertRaises(ValueError,
                           enum_validator(Action), 'not-a-thing')
 
-    def test_enum_validator_none(self):
-        self.assertEqual(enum_validator(Action, allow_none=True)(''), None)
+    def test_enum_validator_blank(self):
+        self.assertEqual(enum_validator(Action, allow_blank=True)(''), None)
diff --git a/src/mailman/rest/validator.py b/src/mailman/rest/validator.py
index 0a6184850..bcc6b3321 100644
--- a/src/mailman/rest/validator.py
+++ b/src/mailman/rest/validator.py
@@ -52,14 +52,14 @@ class ReadOnlyPATCHRequestError(RESTError):
 class enum_validator:
     """Convert an enum value name into an enum value."""
 
-    def __init__(self, enum_class, allow_none=False):
+    def __init__(self, enum_class, *, allow_blank=False):
         self._enum_class = enum_class
-        self._allow_none = allow_none
+        self._allow_blank = allow_blank
 
     def __call__(self, enum_value):
         # This will raise a KeyError if the enum value is unknown.  The
         # Validator API requires turning this into a ValueError.
-        if self._allow_none and not enum_value:
+        if not enum_value and self._allow_blank:
             return None
         try:
             return self._enum_class[enum_value]