diff --git a/partner_contact_lang/__manifest__.py b/partner_contact_lang/__manifest__.py
index d3a5799c5..a6d474e48 100644
--- a/partner_contact_lang/__manifest__.py
+++ b/partner_contact_lang/__manifest__.py
@@ -3,15 +3,12 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
 {
-    'name': 'Manage language in contacts',
-    'version': '11.0.1.0.0',
-    'category': 'Sales',
-    'license': 'AGPL-3',
-    'author': 'Tecnativa,'
-              'Odoo Community Association (OCA)',
-    'website': 'https://github.com/OCA/partner-contact/',
-    'depends': [
-        'base',
-    ],
-    'installable': True,
+    "name": "Manage language in contacts",
+    "version": "11.0.1.0.0",
+    "category": "Sales",
+    "license": "AGPL-3",
+    "author": "Tecnativa," "Odoo Community Association (OCA)",
+    "website": "https://github.com/OCA/partner-contact/",
+    "depends": ["base",],
+    "installable": True,
 }
diff --git a/partner_contact_lang/models/res_partner.py b/partner_contact_lang/models/res_partner.py
index 3149baff6..e802b323f 100644
--- a/partner_contact_lang/models/res_partner.py
+++ b/partner_contact_lang/models/res_partner.py
@@ -6,27 +6,24 @@ from odoo import api, models
 
 
 class ResPartner(models.Model):
-    _inherit = 'res.partner'
+    _inherit = "res.partner"
 
     @api.multi
     def write(self, vals):
         """Propagate a language change in the partner to the child contacts."""
         res = super(ResPartner, self).write(vals)
-        if vals.get('lang'):
-            childs = self.search([
-                ('id', 'child_of', self.ids),
-                ('lang', '=', False),
-            ])
+        if vals.get("lang"):
+            childs = self.search([("id", "child_of", self.ids), ("lang", "=", False),])
             if childs:
-                childs.write({'lang': vals['lang']})
+                childs.write({"lang": vals["lang"]})
         return res
 
-    @api.onchange('parent_id')
+    @api.onchange("parent_id")
     def onchange_parent_id(self):
         """Change language if the parent company changes and there's no
         language defined yet"""
         res = super(ResPartner, self).onchange_parent_id()
         if self.parent_id and self.parent_id != self and not self.lang:
-            val = res.setdefault('value', {})
-            val['lang'] = self.parent_id.lang
+            val = res.setdefault("value", {})
+            val["lang"] = self.parent_id.lang
         return res
diff --git a/partner_contact_lang/tests/test_partner_contact_lang.py b/partner_contact_lang/tests/test_partner_contact_lang.py
index ff8b2df92..2602fcc0c 100644
--- a/partner_contact_lang/tests/test_partner_contact_lang.py
+++ b/partner_contact_lang/tests/test_partner_contact_lang.py
@@ -10,16 +10,11 @@ class TestPartnerContactLang(common.SavepointCase):
     @classmethod
     def setUpClass(cls):
         super(TestPartnerContactLang, cls).setUpClass()
-        cls.ResPartner = cls.env['res.partner']
-        cls.partner = cls.ResPartner.create({
-            'name': 'Partner test',
-            'lang': 'en_US',
-        })
-        cls.contact = cls.ResPartner.create({
-            'name': 'Contact test',
-            'lang': False,
-            'parent_id': cls.partner.id,
-        })
+        cls.ResPartner = cls.env["res.partner"]
+        cls.partner = cls.ResPartner.create({"name": "Partner test", "lang": "en_US",})
+        cls.contact = cls.ResPartner.create(
+            {"name": "Contact test", "lang": False, "parent_id": cls.partner.id,}
+        )
 
     def test_onchange_parent_id(self):
         self.contact.parent_id = False
@@ -27,12 +22,12 @@ class TestPartnerContactLang(common.SavepointCase):
         self.assertIsNone(res)
         self.contact.parent_id = self.partner
         res = self.contact.onchange_parent_id()
-        self.assertEqual(res.get('value', {}).get('lang'), 'en_US')
+        self.assertEqual(res.get("value", {}).get("lang"), "en_US")
 
     def test_write_parent_lang(self):
         """First empty the field for filling it again afterwards to see if
         the contact gets the same value.
         """
         self.partner.lang = False
-        self.partner.lang = 'en_US'
-        self.assertEqual(self.contact.lang, 'en_US')
+        self.partner.lang = "en_US"
+        self.assertEqual(self.contact.lang, "en_US")