diff --git a/django_mailbox/models.py b/django_mailbox/models.py
index 86108eaf..4c76dc55 100644
--- a/django_mailbox/models.py
+++ b/django_mailbox/models.py
@@ -300,7 +300,7 @@ def _get_dehydrated_message(self, msg, record):
         new = EmailMessage()
         if (
             msg.is_multipart()
-            and not 'attachment' in msg.get('Content-Disposition', '')
+            and 'attachment' not in msg.get('Content-Disposition', '')
         ):
             for header, value in msg.items():
                 new[header] = value
@@ -647,20 +647,18 @@ def to_addresses(self):
         return addresses
 
     def reply(self, message):
-        """Sends a message as a reply to this message instance.
-
-        Although Django's e-mail processing will set both Message-ID
-        and Date upon generating the e-mail message, we will not be able
-        to retrieve that information through normal channels, so we must
-        pre-set it.
-
-        For conveninence, you can use django.core.mail.EmailMessage to build a Message instance::
+        """Sends an EmailMessage as a reply to this message instance::
 
             from django.core.mail import EmailMessage
 
             message.reply(
                 EmailMessage(subject="pong", body="pongpong")
             )
+
+        Although Django's e-mail processing will set both Message-ID
+        and Date upon generating the e-mail message, we will not be able
+        to retrieve that information through normal channels, so we must
+        pre-set it.
         """
         from django.core.mail import EmailMessage as DjangoEmailMessage
 
@@ -900,7 +898,6 @@ def __str__(self):
             return f'{self.get_filename()}: {self.document.url}'
         return self.get_filename()
 
-
     class Meta:
         verbose_name = _('Message attachment')
         verbose_name_plural = _('Message attachments')
diff --git a/django_mailbox/tests/test_process_email.py b/django_mailbox/tests/test_process_email.py
index d3316e89..50d43ff6 100644
--- a/django_mailbox/tests/test_process_email.py
+++ b/django_mailbox/tests/test_process_email.py
@@ -345,6 +345,9 @@ def test_message_reply(self):
         )
         msg = self.mailbox.record_outgoing_message(email_object.message())
 
+        with self.assertRaises(ValueError):
+            msg.reply(Message(subject="ping", body="pong"))
+
         self.assertTrue(msg.outgoing)
 
         actual_from = 'username@example.com'
@@ -439,7 +442,7 @@ def test_message_compressed(self):
 
             msg = self.mailbox.process_incoming_message(message)
 
-        actual_email_object = msg.get_email_object()
+        _actual_email_object = msg.get_email_object()
 
         self.assertTrue(msg.eml.name.endswith('.eml.gz'))
 
diff --git a/django_mailbox/transports/base.py b/django_mailbox/transports/base.py
index 57679f8a..51c6b54e 100644
--- a/django_mailbox/transports/base.py
+++ b/django_mailbox/transports/base.py
@@ -11,4 +11,4 @@ def get_email_from_bytes(self, contents):
         return message
 
     def close(self):
-        pass
\ No newline at end of file
+        pass
diff --git a/django_mailbox/transports/imap.py b/django_mailbox/transports/imap.py
index 5b0d2dc8..fb67a8dd 100644
--- a/django_mailbox/transports/imap.py
+++ b/django_mailbox/transports/imap.py
@@ -53,7 +53,7 @@ def close(self):
         try:
             self.server.close()
             self.server.logout()
-        except (imaplib.IMAP4.error, OSError) as  e:
+        except (imaplib.IMAP4.error, OSError) as e:
             logger.warning(f'Failed to close IMAP connection, ignoring: {e}')
             pass