diff --git a/mass_mailing_resend/__init__.py b/mass_mailing_resend/__init__.py
index a77a6fc..83e553a 100644
--- a/mass_mailing_resend/__init__.py
+++ b/mass_mailing_resend/__init__.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
 from . import models
diff --git a/mass_mailing_resend/__manifest__.py b/mass_mailing_resend/__manifest__.py
index 9b97a6c..fc1d1c6 100644
--- a/mass_mailing_resend/__manifest__.py
+++ b/mass_mailing_resend/__manifest__.py
@@ -7,15 +7,10 @@
     "version": "12.0.1.0.0",
     "category": "Marketing",
     "website": "https://github.com/OCA/social",
-    "author": "Tecnativa, "
-              "Odoo Community Association (OCA)",
+    "author": "Tecnativa, " "Odoo Community Association (OCA)",
     "license": "AGPL-3",
     "application": False,
     "installable": True,
-    "depends": [
-        "mass_mailing",
-    ],
-    "data": [
-        "views/mass_mailing_views.xml",
-    ],
+    "depends": ["mass_mailing"],
+    "data": ["views/mass_mailing_views.xml"],
 }
diff --git a/mass_mailing_resend/models/mass_mailing.py b/mass_mailing_resend/models/mass_mailing.py
index baec0e5..8a9e49d 100644
--- a/mass_mailing_resend/models/mass_mailing.py
+++ b/mass_mailing_resend/models/mass_mailing.py
@@ -10,9 +10,11 @@ class MailMassMailingList(models.Model):
 
     def button_draft(self):
         """Return to draft state for resending the mass mailing."""
-        if any(self.mapped(lambda x: x.state != 'done')):
+        if any(self.mapped(lambda x: x.state != "done")):
             raise exceptions.UserError(
-                _("You can't resend a mass mailing that is being sent or in "
-                  "draft state.")
+                _(
+                    "You can't resend a mass mailing that is being sent or in "
+                    "draft state."
+                )
             )
-        self.write({'state': 'draft'})
+        self.write({"state": "draft"})
diff --git a/mass_mailing_resend/tests/test_mass_mailing_resend.py b/mass_mailing_resend/tests/test_mass_mailing_resend.py
index c6c10dc..02bd692 100644
--- a/mass_mailing_resend/tests/test_mass_mailing_resend.py
+++ b/mass_mailing_resend/tests/test_mass_mailing_resend.py
@@ -1,37 +1,36 @@
 # Copyright 2017-2018 Tecnativa - Pedro M. Baeza
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
-from odoo.tests import common
 from odoo import exceptions
+from odoo.tests import common
 
 
 class TestMassMailingResend(common.SavepointCase):
     @classmethod
     def setUpClass(cls):
         super(TestMassMailingResend, cls).setUpClass()
-        cls.list = cls.env['mail.mass_mailing.list'].create({
-            'name': 'Test list',
-        })
-        cls.contact1 = cls.env['mail.mass_mailing.contact'].create({
-            'name': 'Contact 1',
-            'email': 'email1@test.com',
-        })
-        cls.mass_mailing = cls.env['mail.mass_mailing'].create({
-            'name': 'Test mass mailing',
-            'email_from': 'test@example.org',
-            'mailing_model_id': cls.env.ref(
-                'mass_mailing.model_mail_mass_mailing_contact'
-            ).id,
-            'contact_list_ids': [(6, 0, cls.list.ids)],
-            'reply_to_mode': 'thread',
-        })
+        cls.list = cls.env["mail.mass_mailing.list"].create({"name": "Test list"})
+        cls.contact1 = cls.env["mail.mass_mailing.contact"].create(
+            {"name": "Contact 1", "email": "email1@test.com"}
+        )
+        cls.mass_mailing = cls.env["mail.mass_mailing"].create(
+            {
+                "name": "Test mass mailing",
+                "email_from": "test@example.org",
+                "mailing_model_id": cls.env.ref(
+                    "mass_mailing.model_mail_mass_mailing_contact"
+                ).id,
+                "contact_list_ids": [(6, 0, cls.list.ids)],
+                "reply_to_mode": "thread",
+            }
+        )
 
     def test_resend_error(self):
         with self.assertRaises(exceptions.UserError):
             self.mass_mailing.button_draft()
 
     def test_resend(self):
-        self.mass_mailing.state = 'done'  # Force state
-        self.assertEqual(self.mass_mailing.state, 'done')
+        self.mass_mailing.state = "done"  # Force state
+        self.assertEqual(self.mass_mailing.state, "done")
         self.mass_mailing.button_draft()
-        self.assertEqual(self.mass_mailing.state, 'draft')
+        self.assertEqual(self.mass_mailing.state, "draft")