diff --git a/account_banking_mandate_sale/__manifest__.py b/account_banking_mandate_sale/__manifest__.py
index 5aa1755d7..51bbe7840 100644
--- a/account_banking_mandate_sale/__manifest__.py
+++ b/account_banking_mandate_sale/__manifest__.py
@@ -2,21 +2,20 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 {
-    'name': 'Account Banking Mandate Sale',
-    'version': '14.0.1.0.0',
-    'category': 'Banking addons',
-    'license': 'AGPL-3',
-    'summary': "Adds mandates on sale orders",
-    'author': "Odoo Community Association (OCA), "
-              "Akretion",
-    'website': 'https://github.com/OCA/bank-payment',
-    'depends': [
-        'account_payment_sale',
-        'sale_commercial_partner',
-        'account_banking_mandate',
+    "name": "Account Banking Mandate Sale",
+    "version": "14.0.1.0.0",
+    "category": "Banking addons",
+    "license": "AGPL-3",
+    "summary": "Adds mandates on sale orders",
+    "author": "Odoo Community Association (OCA), " "Akretion",
+    "website": "https://github.com/OCA/bank-payment",
+    "depends": [
+        "account_payment_sale",
+        "sale_commercial_partner",
+        "account_banking_mandate",
     ],
-    'data': [
-        'views/sale_order.xml',
+    "data": [
+        "views/sale_order.xml",
     ],
-    'installable': True,
+    "installable": True,
 }
diff --git a/account_banking_mandate_sale/models/sale_order.py b/account_banking_mandate_sale/models/sale_order.py
index 08bbc2b04..ddb400831 100644
--- a/account_banking_mandate_sale/models/sale_order.py
+++ b/account_banking_mandate_sale/models/sale_order.py
@@ -10,35 +10,40 @@ class SaleOrder(models.Model):
     # This field commercial_partner_id should be moved
     # in an OCA base module named for example sale_commercial_partner
     mandate_id = fields.Many2one(
-        'account.banking.mandate',
-        string='Direct Debit Mandate',
-        ondelete='restrict',
+        "account.banking.mandate",
+        string="Direct Debit Mandate",
+        ondelete="restrict",
         check_company=True,
         readonly=False,
-        domain="[('partner_id', '=', commercial_partner_id), ('state', 'in', ('draft', 'valid')), ('company_id', '=', company_id)]",
-        )
+        domain="[('partner_id', '=', commercial_partner_id), "
+        "('state', 'in', ('draft', 'valid')), "
+        "('company_id', '=', company_id)]",
+    )
     mandate_required = fields.Boolean(
-        related='payment_mode_id.payment_method_id.mandate_required',
+        related="payment_mode_id.payment_method_id.mandate_required",
     )
 
     def _prepare_invoice(self):
         """Copy mandate from sale order to invoice"""
         vals = super()._prepare_invoice()
-        vals['mandate_id'] = self.mandate_id.id or False
+        vals["mandate_id"] = self.mandate_id.id or False
         return vals
 
     @api.depends("partner_id")
     def _compute_payment_mode(self):
         """Select by default the first valid mandate of the partner"""
         super()._compute_payment_mode()
-        abm_obj = self.env['account.banking.mandate']
+        abm_obj = self.env["account.banking.mandate"]
         for order in self:
             if order.mandate_required and order.partner_id:
-                mandate = abm_obj.search([
-                    ('state', '=', 'valid'),
-                    ('partner_id', '=', order.commercial_partner_id.id),
-                    ('company_id', '=', order.company_id.id),
-                ], limit=1)
+                mandate = abm_obj.search(
+                    [
+                        ("state", "=", "valid"),
+                        ("partner_id", "=", order.commercial_partner_id.id),
+                        ("company_id", "=", order.company_id.id),
+                    ],
+                    limit=1,
+                )
                 order.mandate_id = mandate or False
             else:
                 order.mandate_id = False
diff --git a/account_banking_mandate_sale/views/sale_order.xml b/account_banking_mandate_sale/views/sale_order.xml
index c6ecae69d..1cab55954 100644
--- a/account_banking_mandate_sale/views/sale_order.xml
+++ b/account_banking_mandate_sale/views/sale_order.xml
@@ -1,21 +1,22 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8" ?>
 <!--
   © 2016 Akretion (Alexis de Lattre <alexis.delattre@akretion.com>)
   License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 -->
-
 <odoo>
 
 <record id="view_order_form" model="ir.ui.view">
     <field name="name">account_banking_mandate_sale.sale_order.form</field>
     <field name="model">sale.order</field>
-    <field name="inherit_id" ref="account_payment_sale.view_order_form"/>
+    <field name="inherit_id" ref="account_payment_sale.view_order_form" />
     <field name="arch" type="xml">
         <field name="fiscal_position_id" position="after">
-            <field name="commercial_partner_id" invisible="1"/>
-            <field name="mandate_id"
-                   attrs="{'invisible': [('mandate_required', '=', False)]}"/>
-            <field name="mandate_required" invisible="1"/>
+            <field name="commercial_partner_id" invisible="1" />
+            <field
+                    name="mandate_id"
+                    attrs="{'invisible': [('mandate_required', '=', False)]}"
+                />
+            <field name="mandate_required" invisible="1" />
         </field>
     </field>
 </record>
diff --git a/account_banking_mandate_sale/wizard/sale_make_invoice_advance.py b/account_banking_mandate_sale/wizard/sale_make_invoice_advance.py
index e449d679e..bc91d6448 100644
--- a/account_banking_mandate_sale/wizard/sale_make_invoice_advance.py
+++ b/account_banking_mandate_sale/wizard/sale_make_invoice_advance.py
@@ -1,15 +1,15 @@
 # Copyright 2016-2020 Akretion (Alexis de Lattre <alexis.delattre@akretion.com>)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from odoo import api, models
+from odoo import models
 
 
 class SaleAdvancePaymentInv(models.TransientModel):
-    _inherit = 'sale.advance.payment.inv'
+    _inherit = "sale.advance.payment.inv"
 
     def _prepare_invoice_values(self, order, name, amount, so_line):
         """Copy mandate from sale order to invoice"""
         vals = super()._prepare_invoice_values(order, name, amount, so_line)
         if order.mandate_id:
-            vals['mandate_id'] = order.mandate_id.id
+            vals["mandate_id"] = order.mandate_id.id
         return vals