diff --git a/l10n_ch_qr_bill_scan/README.rst b/l10n_ch_qr_bill_scan/README.rst
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/l10n_ch_qr_bill_scan/__manifest__.py b/l10n_ch_qr_bill_scan/__manifest__.py
index b4eb89bf9b..9a8f2c5b2e 100644
--- a/l10n_ch_qr_bill_scan/__manifest__.py
+++ b/l10n_ch_qr_bill_scan/__manifest__.py
@@ -2,17 +2,15 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
 {
-    'name': 'Switzerland - QR-bill scan',
-    'summary': 'Scan QR-bill to create vendor bills',
-    'version': '13.0.1.0.0',
-    'author': "Camptocamp,Odoo Community Association (OCA)",
-    'category': 'Localization',
-    'website': 'https://github.com/OCA/l10n-switzerland',
-    'license': 'AGPL-3',
-    'depends': ['l10n_ch', 'account_invoice_import'],
-    'data': [
-        "wizard/account_invoice_import_view.xml"
-    ],
-    'auto_install': False,
-    'installable': True,
+    "name": "Switzerland - QR-bill scan",
+    "summary": "Scan QR-bill to create vendor bills",
+    "version": "13.0.1.0.0",
+    "author": "Camptocamp,Odoo Community Association (OCA)",
+    "category": "Localization",
+    "website": "https://github.com/OCA/l10n-switzerland",
+    "license": "AGPL-3",
+    "depends": ["l10n_ch", "account_invoice_import"],
+    "data": ["wizard/account_invoice_import_view.xml"],
+    "auto_install": False,
+    "installable": True,
 }
diff --git a/l10n_ch_qr_bill_scan/readme/DESCRIPTION.rst b/l10n_ch_qr_bill_scan/readme/DESCRIPTION.rst
index 0430eb2517..4bfbd093f3 100644
--- a/l10n_ch_qr_bill_scan/readme/DESCRIPTION.rst
+++ b/l10n_ch_qr_bill_scan/readme/DESCRIPTION.rst
@@ -10,7 +10,7 @@ Optionally you can also import Vendor bills directly from a PDF.
 To enable this feature those additional dependencies must be
 installed on your Odoo server:
 
-    pip install pyzbar,pdf2image,cv2,numpy
+    pip install pyzbar,numpy,pdf2image,opencv-python
 
 
 If you are looking to generate QR-bill, this feature is already available
diff --git a/l10n_ch_qr_bill_scan/readme/USAGE.rst b/l10n_ch_qr_bill_scan/readme/USAGE.rst
index f80141bb2a..911e8087db 100644
--- a/l10n_ch_qr_bill_scan/readme/USAGE.rst
+++ b/l10n_ch_qr_bill_scan/readme/USAGE.rst
@@ -2,7 +2,7 @@ Launch wizard `Invoicing` -> `Vendors` -> `Import Vendor Bill`.
 
 In there you can either directly the QR code of the QR-bill or you can import a PDF/image file.
 
-If it's the first time you import a Bill from a Vendor the wizard will ask you to create the partner and to set a import configuration for that partner 
+If it's the first time you import a Bill from a Vendor the wizard will ask you to create the partner and to set a import configuration for that partner
 A configuration let you set which expense account you want the invoice to be imported with.
 
 
diff --git a/l10n_ch_qr_bill_scan/tests/test_scan_qrbill.py b/l10n_ch_qr_bill_scan/tests/test_scan_qrbill.py
index 1be6aff885..3dbd3a0a9e 100644
--- a/l10n_ch_qr_bill_scan/tests/test_scan_qrbill.py
+++ b/l10n_ch_qr_bill_scan/tests/test_scan_qrbill.py
@@ -1,16 +1,13 @@
 # Copyright 2020 Camptocamp (http://www.camptocamp.com/)
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
 import base64
-import time
 
-from odoo.addons.account.tests.account_test_classes import AccountingTestCase
-
-from odoo.modules.module import get_resource_path
 from odoo import tools
 from odoo.exceptions import UserError
-from odoo.addons.l10n_ch_qr_bill_scan.tools import QR
+from odoo.modules.module import get_resource_path
+from odoo.tests import common
 
-from mock import MagicMock
+from odoo.addons.l10n_ch_qr_bill_scan.tools import QR
 
 # QR Reference
 QRR = "210000000003139471430009017"
@@ -59,15 +56,13 @@
     "",
 ]
 
-from odoo.tests import common
 
 class TestScanQRBill(common.SavepointCase):
-
     @classmethod
     def setUpClass(cls):
         super().setUpClass()
         cls.env.user.company_id.invoice_import_create_bank_account = True
-        cls.supplier = cls.env['res.partner'].create(
+        cls.supplier = cls.env["res.partner"].create(
             {
                 "name": "Camptocamp",
                 "street": "EPFL Innovation Park",
@@ -86,16 +81,18 @@ def setUpClass(cls):
                 "user_type_id": cls.env.ref("account.data_account_type_expenses").id,
             }
         )
-        cls.env["account.invoice.import.config"].create({
-            "name": "Camptocamp - one line no product",
-            "partner_id": cls.supplier.id,
-            "invoice_line_method": "1line_no_product",
-            "account_id": cls.expense_account.id,
-        })
+        cls.env["account.invoice.import.config"].create(
+            {
+                "name": "Camptocamp - one line no product",
+                "partner_id": cls.supplier.id,
+                "invoice_line_method": "1line_no_product",
+                "account_id": cls.expense_account.id,
+            }
+        )
 
     def wiz_import_invoice_file(self, file_path, file_name):
         """ Import a file of a vendor bill """
-        with tools.file_open(file_path, 'rb') as f:
+        with tools.file_open(file_path, "rb") as f:
             invoice_file = base64.b64encode(f.read())
         wiz = self.env["account.invoice.import"].create({})
         wiz.invoice_file = invoice_file
@@ -109,8 +106,8 @@ def import_invoice_file(self, file_path, file_name):
         """
         wiz = self.wiz_import_invoice_file(file_path, file_name)
         res = wiz.import_invoice()
-        if res.get('res_model') == 'account.move':
-            invoice = self.env['account.move'].browse(res['res_id'])
+        if res.get("res_model") == "account.move":
+            invoice = self.env["account.move"].browse(res["res_id"])
             return invoice
         return None
 
@@ -127,8 +124,8 @@ def import_invoice_scan(self, invoice_scan):
         """
         wiz = self.wiz_import_invoice_scan(invoice_scan)
         res = wiz.import_invoice()
-        if res.get('res_model') == 'account.move':
-            invoice = self.env['account.move'].browse(res['res_id'])
+        if res.get("res_model") == "account.move":
+            invoice = self.env["account.move"].browse(res["res_id"])
             return invoice
         return None
 
@@ -176,12 +173,12 @@ def test_scan_QR_new_partner(self):
         wiz = self.wiz_import_invoice_scan(scan_data)
         wiz.import_invoice()
 
-        self.assertEqual(wiz.state, 'select-partner')
-        self.assertEqual(wiz.partner_name, 'New Vendor')
-        self.assertEqual(wiz.partner_street, 'EPFL Innovation Park Bldg A')
-        self.assertEqual(wiz.partner_zip, '1015')
-        self.assertEqual(wiz.partner_city, 'Lausanne')
-        self.assertEqual(wiz.partner_country_id, self.env.ref('base.ch'))
+        self.assertEqual(wiz.state, "select-partner")
+        self.assertEqual(wiz.partner_name, "New Vendor")
+        self.assertEqual(wiz.partner_street, "EPFL Innovation Park Bldg A")
+        self.assertEqual(wiz.partner_zip, "1015")
+        self.assertEqual(wiz.partner_city, "Lausanne")
+        self.assertEqual(wiz.partner_country_id, self.env.ref("base.ch"))
 
     def test_scan_QR_swico(self):
         self.assertTrue(False)
@@ -230,7 +227,7 @@ def test_scan_QR_bad_amount(self):
             self.import_invoice_scan(scan_data)
 
     def test_import_QR_pdf(self):
-        partner = self.env['res.partner'].create(
+        partner = self.env["res.partner"].create(
             {
                 "name": "My Company",  # this was generated from Odoo
                 "street": "addr 1",
@@ -241,16 +238,19 @@ def test_import_QR_pdf(self):
             }
         )
         partner.supplier_rank = 1
-        self.env["account.invoice.import.config"].create({
-            "name": "Camptocamp - one line no product",
-            "partner_id": partner.id,
-            "invoice_line_method": "1line_no_product",
-            "account_id": self.expense_account.id,
-        })
-
-        invoice_fp = get_resource_path('l10n_ch_qr_bill_scan', 'tests', 'data', 'qr-bill.pdf')
-        self.env['account.invoice.import']
+        self.env["account.invoice.import.config"].create(
+            {
+                "name": "Camptocamp - one line no product",
+                "partner_id": partner.id,
+                "invoice_line_method": "1line_no_product",
+                "account_id": self.expense_account.id,
+            }
+        )
+
+        invoice_fp = get_resource_path(
+            "l10n_ch_qr_bill_scan", "tests", "data", "qr-bill.pdf"
+        )
         invoice = self.import_invoice_file(invoice_fp, "qr-bill.pdf")
         self.assertTrue(invoice)
         self.assertEqual(invoice.invoice_payment_ref, "000000000000000000202000058")
-        self.assertEqual(invoice.amount_total, 1.)
+        self.assertEqual(invoice.amount_total, 1.0)
diff --git a/l10n_ch_qr_bill_scan/wizard/account_invoice_import.py b/l10n_ch_qr_bill_scan/wizard/account_invoice_import.py
index 6086a07563..50207d511e 100644
--- a/l10n_ch_qr_bill_scan/wizard/account_invoice_import.py
+++ b/l10n_ch_qr_bill_scan/wizard/account_invoice_import.py
@@ -1,11 +1,7 @@
 # Copyright 2020 Camptocamp
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
 
-import base64
 import logging
-import mimetypes
-
-import json
 
 from odoo import _, api, fields, models
 from odoo.exceptions import UserError
@@ -13,7 +9,6 @@
 
 from ..tools import QR
 
-
 logger = logging.getLogger(__name__)
 
 try:
@@ -38,17 +33,16 @@ class AccountInvoiceImport(models.TransientModel):
     invoice_file = fields.Binary(string="PDF, PNG or XML Invoice", required=False)
 
     state = fields.Selection(
-        selection_add=[
-            ("select-partner", "Select partner"),
-        ],
-        default="import",
+        selection_add=[("select-partner", "Select partner")], default="import",
     )
 
     partner_name = fields.Char("Name", readonly=True)
     partner_street = fields.Char("Street", readonly=True)
     partner_zip = fields.Char("ZIP", readonly=True)
     partner_city = fields.Char("City", readonly=True)
-    partner_country_id = fields.Many2one(string="Country", comodel_name="res.country", readonly=True)
+    partner_country_id = fields.Many2one(
+        string="Country", comodel_name="res.country", readonly=True
+    )
 
     def get_parsed_invoice(self):
         if self.invoice_scan:
@@ -82,11 +76,10 @@ def _parse_billing_info(self, bill_info):
     def parse_qrbill(self, qr_data):
         qr_match = QR.valid_re.search(qr_data)
         if not qr_match:
-            raise UserError(
-                _("The data doesn't match with a QR-Code from a QR-bill"))
+            raise UserError(_("The data doesn't match with a QR-Code from a QR-bill"))
         # Ignore everything before "SPC"
         if qr_match.start() > 0:
-            qr_data = qr_data[qr_match.start():]
+            qr_data = qr_data[qr_match.start() :]
 
         qr_data = qr_data.split("\n")
 
@@ -96,11 +89,11 @@ def parse_qrbill(self, qr_data):
             raise UserError(_("The {} "))
         parsed_inv = {
             "iban": qr_data[QR.IBAN],
-            "partner": self._get_qr_address(qr_data[QR.CREDITOR:QR.CREDITOR + QR.ADR_LEN]),
+            "partner": self._get_qr_address(
+                qr_data[QR.CREDITOR : QR.CREDITOR + QR.ADR_LEN]
+            ),
             "amount_total": amount,
-            "currency": {
-                "iso": qr_data[QR.CURRENCY],
-            },
+            "currency": {"iso": qr_data[QR.CURRENCY]},
             "invoice_number": qr_data[QR.REF],
             "description": qr_data[QR.MSG],
         }
@@ -117,7 +110,7 @@ def _patch_swiss_qr_code(self, bill_img):
         # find an replace Swiss Cross as it prevent ZBar from detecting the
         # QR Code
         ch_cross_img = cv2.imread(
-            get_resource_path('l10n_ch_qr_bill_scan', 'data', 'CH-Cross_7mm.png')
+            get_resource_path("l10n_ch_qr_bill_scan", "data", "CH-Cross_7mm.png")
         )
         ch_cross_img = cv2.resize(ch_cross_img, (55, 55))
         res = cv2.matchTemplate(ch_cross_img, bill_img, cv2.TM_CCOEFF_NORMED)
@@ -127,16 +120,16 @@ def _patch_swiss_qr_code(self, bill_img):
         y = locations[0][0]
         x = locations[1][0]
         patch_img = cv2.imread(
-            get_resource_path('l10n_ch_qr_bill_scan', 'data', 'QR-patch.png')
+            get_resource_path("l10n_ch_qr_bill_scan", "data", "QR-patch.png")
         )
-        bill_img[y:y + patch_img.shape[0], x:x + patch_img.shape[1]] = patch_img
+        bill_img[y : y + patch_img.shape[0], x : x + patch_img.shape[1]] = patch_img
         return bill_img
 
     def parse_pdf_invoice(self, file_data):
         if decode:
             logger.debug("Search for Swiss QR-Code in PDF file")
             # TODO support multiple pages
-            pdf_img = pdf2image.convert_from_bytes(file_data)[0].convert('RGB')
+            pdf_img = pdf2image.convert_from_bytes(file_data)[0].convert("RGB")
             pdf_img = np.array(pdf_img)
             # Convert RGB to BGR
             pdf_img = pdf_img[:, :, ::-1].copy()
@@ -154,7 +147,8 @@ def _hook_no_partner_found(self, partner_dict):
         """Switch wizard to partner creation.
         """
         country = self.env["res.country"].search(
-                [("code", "=", partner_dict["country_code"])], limit=1)
+            [("code", "=", partner_dict["country_code"])], limit=1
+        )
         wiz_vals = {
             "state": "select-partner",
             "partner_name": partner_dict["name"],
diff --git a/l10n_ch_qr_bill_scan/wizard/account_invoice_import_view.xml b/l10n_ch_qr_bill_scan/wizard/account_invoice_import_view.xml
index cc01a3cf50..48cb13a22f 100644
--- a/l10n_ch_qr_bill_scan/wizard/account_invoice_import_view.xml
+++ b/l10n_ch_qr_bill_scan/wizard/account_invoice_import_view.xml
@@ -12,52 +12,72 @@
         <field name="domain">[]</field>
         <field name="view_mode">form</field>
         <field name="target">new</field>
-        <field name="context">{'res_partner_search_mode': 'supplier', 'default_is_company': True}</field>
-        <field name="filter" eval="True"/>
+        <field
+            name="context"
+        >{'res_partner_search_mode': 'supplier', 'default_is_company': True}</field>
+        <field name="filter" eval="True" />
         <field name="help" type="html">
             <p class="o_view_nocontent_smiling_face">
                 Create a new vendor in your address book
-            </p><p>
+            </p>
+            <p>
                 Odoo helps you easily track all activities related to a vendor.
             </p>
         </field>
     </record>
     <record id="account_invoice_import_form" model="ir.ui.view">
         <field name="model">account.invoice.import</field>
-        <field name="inherit_id" ref="account_invoice_import.account_invoice_import_form"/>
+        <field
+            name="inherit_id"
+            ref="account_invoice_import.account_invoice_import_form"
+        />
         <field name="arch" type="xml">
             <xpath expr="//div[@name='help-import']" position="before">
                 <div name="help-import-scan" states="import">
-                  <p><big><big><i class="fa fa-qrcode"/></big></big> Scan a QR-bill code from a supplier invoice</p>
+                    <p><big>
+                            <big>
+                                <i class="fa fa-qrcode" />
+                            </big>
+                        </big> Scan a QR-bill code from a supplier invoice</p>
                 </div>
                 <group name="main">
-                    <field
-                        name="invoice_scan"
-                        states="import,update-from-invoice"
-                    />
+                    <field name="invoice_scan" states="import,update-from-invoice" />
                 </group>
                 <div name="help-or" states="import">
-                  <p><b>OR</b></p>
+                    <p>
+                        <b>OR</b>
+                    </p>
                 </div>
                 <div name="help-import-partner-select" states="select-partner">
-                    <p>Partner was not found or is not set as a supplier. Please create or select the partner before continuing</p>
+                    <p
+                    >Partner was not found or is not set as a supplier. Please create or select the partner before continuing</p>
                 </div>
             </xpath>
             <field name="partner_id" position="attributes">
-                <attribute name="context">{'default_name': partner_name, 'default_street': partner_street, 'default_zip': partner_zip, 'default_city': partner_city, 'default_country_id': partner_country_id}</attribute>
-                <attribute name="states">config,update,update-from-invoice,select-partner</attribute>
-                <attribute name="attrs">{'readonly': [('state', '!=', 'select-partner')], 'required': [('state', '=', 'select-partner')]}</attribute>
+                <attribute
+                    name="context"
+                >{'default_name': partner_name, 'default_street': partner_street, 'default_zip': partner_zip, 'default_city': partner_city, 'default_country_id': partner_country_id}</attribute>
+                <attribute
+                    name="states"
+                >config,update,update-from-invoice,select-partner</attribute>
+                <attribute
+                    name="attrs"
+                >{'readonly': [('state', '!=', 'select-partner')], 'required': [('state', '=', 'select-partner')]}</attribute>
             </field>
             <group name="main">
-                <field name="partner_name" states="select-partner"/>
-                <field name="partner_street" states="select-partner"/>
-                <field name="partner_zip" states="select-partner"/>
-                <field name="partner_city" states="select-partner"/>
-                <field name="partner_country_id" states="select-partner"/>
+                <field name="partner_name" states="select-partner" />
+                <field name="partner_street" states="select-partner" />
+                <field name="partner_zip" states="select-partner" />
+                <field name="partner_city" states="select-partner" />
+                <field name="partner_country_id" states="select-partner" />
             </group>
             <field name="import_config_id" position="attributes">
-                <attribute name="states">config,update-from-invoice,update,select-partner</attribute>
-                <attribute name="attrs">{'required': [('state', 'in', ('config', 'update-from-invoice', 'update', 'select-partner'))]}</attribute>
+                <attribute
+                    name="states"
+                >config,update-from-invoice,update,select-partner</attribute>
+                <attribute
+                    name="attrs"
+                >{'required': [('state', 'in', ('config', 'update-from-invoice', 'update', 'select-partner'))]}</attribute>
                 <attribute name="context">{'default_partner_id': partner_id}</attribute>
             </field>
             <button name="import_invoice" position="after">