diff --git a/partner_deduplicate_by_ref/__manifest__.py b/partner_deduplicate_by_ref/__manifest__.py
index 1c5831c9f..8cca0bc8e 100644
--- a/partner_deduplicate_by_ref/__manifest__.py
+++ b/partner_deduplicate_by_ref/__manifest__.py
@@ -5,14 +5,9 @@
     "version": "12.0.1.0.0",
     "category": "Tools",
     "website": "https://www.github.com/OCA/partner-contact",
-    "author": "Tecnativa, "
-              "Odoo Community Association (OCA)",
+    "author": "Tecnativa, " "Odoo Community Association (OCA)",
     "license": "AGPL-3",
     "installable": True,
-    "depends": [
-        "partner_deduplicate_acl",
-    ],
-    "data": [
-        'wizards/partner_merge_view.xml',
-    ],
+    "depends": ["partner_deduplicate_acl",],
+    "data": ["wizards/partner_merge_view.xml",],
 }
diff --git a/partner_deduplicate_by_ref/tests/test_partner_deduplicate_by_ref.py b/partner_deduplicate_by_ref/tests/test_partner_deduplicate_by_ref.py
index dd069533c..961808765 100644
--- a/partner_deduplicate_by_ref/tests/test_partner_deduplicate_by_ref.py
+++ b/partner_deduplicate_by_ref/tests/test_partner_deduplicate_by_ref.py
@@ -8,42 +8,35 @@ from odoo.tools.safe_eval import safe_eval
 class TestDeduplicateByRef(common.TransactionCase):
     def setUp(self):
         super().setUp()
-        self.partner_1 = self.env['res.partner'].create({
-            'name': 'Partner 1',
-            'ref': '123456',
-            'email': 'test@deduplicate.com',
-        })
-        self.partner_2 = self.env['res.partner'].create({
-            'name': 'Partner 2',
-            'ref': '123456',
-            'email': 'test@deduplicate.com',
-        })
+        self.partner_1 = self.env["res.partner"].create(
+            {"name": "Partner 1", "ref": "123456", "email": "test@deduplicate.com",}
+        )
+        self.partner_2 = self.env["res.partner"].create(
+            {"name": "Partner 2", "ref": "123456", "email": "test@deduplicate.com",}
+        )
 
     def test_deduplicate_by_ref(self):
-        wizard = self.env['base.partner.merge.automatic.wizard'].create({
-            'group_by_ref': True,
-        })
+        wizard = self.env["base.partner.merge.automatic.wizard"].create(
+            {"group_by_ref": True,}
+        )
         wizard.action_start_manual_process()
         found_match = False
         for line in wizard.line_ids:
             match_ids = safe_eval(line.aggr_ids)
-            if (self.partner_1.id in match_ids and
-                    self.partner_2.id in match_ids):
+            if self.partner_1.id in match_ids and self.partner_2.id in match_ids:
                 found_match = True
                 break
         self.assertTrue(found_match)
 
     def test_deduplicate_by_ref_and_is_company(self):
-        wizard = self.env['base.partner.merge.automatic.wizard'].create({
-            'group_by_ref': True,
-            'group_by_email': True,
-        })
+        wizard = self.env["base.partner.merge.automatic.wizard"].create(
+            {"group_by_ref": True, "group_by_email": True,}
+        )
         wizard.action_start_manual_process()
         found_match = False
         for line in wizard.line_ids:
             match_ids = safe_eval(line.aggr_ids)
-            if (self.partner_1.id in match_ids and
-                    self.partner_2.id in match_ids):
+            if self.partner_1.id in match_ids and self.partner_2.id in match_ids:
                 found_match = True
                 break
         self.assertTrue(found_match)
diff --git a/partner_deduplicate_by_ref/wizards/partner_merge.py b/partner_deduplicate_by_ref/wizards/partner_merge.py
index bfd12002a..500c58a81 100644
--- a/partner_deduplicate_by_ref/wizards/partner_merge.py
+++ b/partner_deduplicate_by_ref/wizards/partner_merge.py
@@ -7,22 +7,19 @@ from openerp import fields, models
 class BasePartnerMergeAutomaticWizard(models.TransientModel):
     _inherit = "base.partner.merge.automatic.wizard"
 
-    group_by_ref = fields.Boolean('Reference')
+    group_by_ref = fields.Boolean("Reference")
 
     def _generate_query(self, fields, maximum_group=100):
         """Inject the additional criteria 'ref IS NOT NULL' when needed.
         There's no better way to do it, as there are no hooks for adding
         this criteria regularly.
         """
-        query = super()._generate_query(
-            fields, maximum_group=maximum_group)
-        if 'ref' in fields:
-            if 'WHERE' in query:
-                index = query.find('WHERE')
-                query = (query[:index + 6] + "ref IS NOT NULL AND " +
-                         query[index + 6:])
+        query = super()._generate_query(fields, maximum_group=maximum_group)
+        if "ref" in fields:
+            if "WHERE" in query:
+                index = query.find("WHERE")
+                query = query[: index + 6] + "ref IS NOT NULL AND " + query[index + 6 :]
             else:
-                index = query.find(' GROUP BY')
-                query = (query[:index] + " WHERE ref IS NOT NULL" +
-                         query[index:])
+                index = query.find(" GROUP BY")
+                query = query[:index] + " WHERE ref IS NOT NULL" + query[index:]
         return query
diff --git a/partner_deduplicate_by_ref/wizards/partner_merge_view.xml b/partner_deduplicate_by_ref/wizards/partner_merge_view.xml
index 016c266cc..6a3d06780 100644
--- a/partner_deduplicate_by_ref/wizards/partner_merge_view.xml
+++ b/partner_deduplicate_by_ref/wizards/partner_merge_view.xml
@@ -1,20 +1,20 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8" ?>
 <!-- Copyright 2017 Pedro M. Baeza <pedro.baeza@tecnativa.com>
      License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html). -->
-
 <odoo>
-
     <record id="base_partner_merge_automatic_wizard_form" model="ir.ui.view">
         <field name="model">base.partner.merge.automatic.wizard</field>
-        <field name="inherit_id" ref="base.base_partner_merge_automatic_wizard_form"/>
+        <field name="inherit_id" ref="base.base_partner_merge_automatic_wizard_form" />
         <field name="arch" type="xml">
             <field name="group_by_parent_id" position="after">
-                <field name="group_by_ref"/>
+                <field name="group_by_ref" />
             </field>
-            <xpath expr="//field[@name='partner_ids']/tree//field[@name='country_id']" position="after">
-                <field name="ref"/>
+            <xpath
+                expr="//field[@name='partner_ids']/tree//field[@name='country_id']"
+                position="after"
+            >
+                <field name="ref" />
             </xpath>
         </field>
     </record>
-
 </odoo>