diff --git a/report_wkhtmltopdf_param/__manifest__.py b/report_wkhtmltopdf_param/__manifest__.py
index bd0639be3..468883fc3 100644
--- a/report_wkhtmltopdf_param/__manifest__.py
+++ b/report_wkhtmltopdf_param/__manifest__.py
@@ -10,18 +10,11 @@
         Add new parameters for a paper format to be used by wkhtmltopdf
         command as arguments.
     """,
-    "author": "Avoin.Systems,"
-              "Eficent,"
-              "Odoo Community Association (OCA)",
+    "author": "Avoin.Systems," "Eficent," "Odoo Community Association (OCA)",
     "website": "https://avoin.systems",
     "category": "Technical Settings",
-    "depends": [
-        "web",
-    ],
-    "data": [
-        "security/ir.model.access.csv",
-        "views/paperformat.xml",
-    ],
+    "depends": ["web",],
+    "data": ["security/ir.model.access.csv", "views/paperformat.xml",],
     "installable": True,
     "auto_install": False,
     "application": False,
diff --git a/report_wkhtmltopdf_param/models/report.py b/report_wkhtmltopdf_param/models/report.py
index 82f318e6b..8bf8f5e9e 100644
--- a/report_wkhtmltopdf_param/models/report.py
+++ b/report_wkhtmltopdf_param/models/report.py
@@ -6,21 +6,19 @@ from odoo import api, models
 
 
 class IrActionsReport(models.Model):
-    _inherit = 'ir.actions.report'
+    _inherit = "ir.actions.report"
 
     @api.model
     def _build_wkhtmltopdf_args(
-            self,
-            paperformat_id,
-            landscape,
-            specific_paperformat_args=None,
-            set_viewport_size=False):
+        self,
+        paperformat_id,
+        landscape,
+        specific_paperformat_args=None,
+        set_viewport_size=False,
+    ):
         # noinspection PyUnresolvedReferences,PyProtectedMember
         command_args = super(IrActionsReport, self)._build_wkhtmltopdf_args(
-            paperformat_id,
-            landscape,
-            specific_paperformat_args,
-            set_viewport_size
+            paperformat_id, landscape, specific_paperformat_args, set_viewport_size
         )
 
         for param in paperformat_id.custom_params:
diff --git a/report_wkhtmltopdf_param/models/report_paperformat.py b/report_wkhtmltopdf_param/models/report_paperformat.py
index 20846771c..65c15189a 100644
--- a/report_wkhtmltopdf_param/models/report_paperformat.py
+++ b/report_wkhtmltopdf_param/models/report_paperformat.py
@@ -2,25 +2,25 @@
 # Copyright 2017 Eficent Business and IT Consulting Services, S.L.
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
 
-from odoo import api, fields, models, _
-from odoo.exceptions import ValidationError
 import logging
 
+from odoo import _, api, fields, models
+from odoo.exceptions import ValidationError
+
 _logger = logging.getLogger(__name__)
 
 
 class Paper(models.Model):
-    _inherit = 'report.paperformat'
+    _inherit = "report.paperformat"
 
     custom_params = fields.One2many(
-        'report.paperformat.parameter',
-        'paperformat_id',
-        'Custom Parameters',
-        help='Custom Parameters passed forward as wkhtmltopdf '
-             'command arguments'
+        "report.paperformat.parameter",
+        "paperformat_id",
+        "Custom Parameters",
+        help="Custom Parameters passed forward as wkhtmltopdf " "command arguments",
     )
 
-    @api.constrains('custom_params')
+    @api.constrains("custom_params")
     def _check_recursion(self):
         for paperformat in self:
             sample_html = """
@@ -33,11 +33,12 @@ class Paper(models.Model):
                     </body>
                 </html>
             """
-            contenthtml = [bytes(sample_html, 'utf-8')]
-            report = self.env['ir.actions.report'].new({
-                'paperformat_id': paperformat.id
-            })
+            contenthtml = [bytes(sample_html, "utf-8")]
+            report = self.env["ir.actions.report"].new(
+                {"paperformat_id": paperformat.id}
+            )
             content = report._run_wkhtmltopdf(contenthtml)
             if not content:
-                raise ValidationError(_(
-                    "Failed to create a PDF using the provided parameters."))
+                raise ValidationError(
+                    _("Failed to create a PDF using the provided parameters.")
+                )
diff --git a/report_wkhtmltopdf_param/models/report_paperformat_parameter.py b/report_wkhtmltopdf_param/models/report_paperformat_parameter.py
index b8980c912..4a9d40304 100644
--- a/report_wkhtmltopdf_param/models/report_paperformat_parameter.py
+++ b/report_wkhtmltopdf_param/models/report_paperformat_parameter.py
@@ -1,25 +1,21 @@
 # Copyright 2017 Avoin.Systems
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
 
-from odoo import models, fields
+from odoo import fields, models
 
 
 class ReportPaperformatParameter(models.Model):
-    _name = 'report.paperformat.parameter'
-    _description = 'wkhtmltopdf parameters'
+    _name = "report.paperformat.parameter"
+    _description = "wkhtmltopdf parameters"
 
     paperformat_id = fields.Many2one(
-        'report.paperformat',
-        'Paper Format',
-        required=True,
+        "report.paperformat", "Paper Format", required=True,
     )
 
     name = fields.Char(
-        'Name',
+        "Name",
         required=True,
-        help='The command argument name. Remember to add prefix -- or -'
+        help="The command argument name. Remember to add prefix -- or -",
     )
 
-    value = fields.Char(
-        'Value',
-    )
+    value = fields.Char("Value",)
diff --git a/report_wkhtmltopdf_param/tests/test_report_paperformat.py b/report_wkhtmltopdf_param/tests/test_report_paperformat.py
index f238ae1dc..d7a27fc71 100644
--- a/report_wkhtmltopdf_param/tests/test_report_paperformat.py
+++ b/report_wkhtmltopdf_param/tests/test_report_paperformat.py
@@ -10,23 +10,24 @@ from odoo.exceptions import ValidationError
 @odoo.tests.common.post_install(True)
 class TestWkhtmltopdf(odoo.tests.TransactionCase):
     def test_wkhtmltopdf_incorrect_parameter(self):
-        for report_paperformat in self.env['report.paperformat'].search([]):
+        for report_paperformat in self.env["report.paperformat"].search([]):
             with self.assertRaises(ValidationError):
-                report_paperformat.update({
-                    'custom_params': [(0, 0, {
-                        'name': 'bad-parameter'
-                    })]})
+                report_paperformat.update(
+                    {"custom_params": [(0, 0, {"name": "bad-parameter"})]}
+                )
 
     def test_wkhtmltopdf_valid_parameter(self):
-        for report_paperformat in self.env['report.paperformat'].search([]):
+        for report_paperformat in self.env["report.paperformat"].search([]):
             error = False
             try:
-                report_paperformat.update({
-                    'custom_params': [(0, 0, {
-                        'name': '--disable-smart-shrinking'
-                    })]})
+                report_paperformat.update(
+                    {"custom_params": [(0, 0, {"name": "--disable-smart-shrinking"})]}
+                )
             except ValidationError:
                 error = True
-            self.assertEquals(error, False,
-                              "There was an error adding wkhtmltopdf "
-                              "parameter --disable-smart-shrinking")
+            self.assertEquals(
+                error,
+                False,
+                "There was an error adding wkhtmltopdf "
+                "parameter --disable-smart-shrinking",
+            )
diff --git a/report_wkhtmltopdf_param/views/paperformat.xml b/report_wkhtmltopdf_param/views/paperformat.xml
index 460dd4277..9a185055f 100644
--- a/report_wkhtmltopdf_param/views/paperformat.xml
+++ b/report_wkhtmltopdf_param/views/paperformat.xml
@@ -1,21 +1,19 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8" ?>
 <odoo>
     <!-- FORM: report.paperformat -->
     <record id="paperformat_view_form_custom" model="ir.ui.view">
         <field name="name">paperformat with custom parameters</field>
         <field name="model">report.paperformat</field>
-        <field name="inherit_id" ref="base.paperformat_view_form"/>
+        <field name="inherit_id" ref="base.paperformat_view_form" />
         <field name="arch" type="xml">
             <field name="report_ids" position="after">
                 <field name="custom_params">
                     <tree editable="bottom">
-                        <field name="name"/>
-                        <field name="value"/>
+                        <field name="name" />
+                        <field name="value" />
                     </tree>
                 </field>
             </field>
-
         </field>
     </record>
-
 </odoo>