diff --git a/.isort.cfg b/.isort.cfg
new file mode 100644
index 0000000000..e1c6495da9
--- /dev/null
+++ b/.isort.cfg
@@ -0,0 +1,3 @@
+[settings]
+multi_line_output=4
+known_first_party=trytond
diff --git a/__init__.py b/__init__.py
index 7493f3b7d5..1a4d7fee42 100644
--- a/__init__.py
+++ b/__init__.py
@@ -2,10 +2,8 @@
 # this repository contains the full copyright notices and license terms.
 
 from trytond.pool import Pool
-from . import marketing
-from . import ir
-from . import web
-from . import routes
+
+from . import ir, marketing, routes, web
 
 __all__ = ['register', 'routes']
 
diff --git a/marketing.py b/marketing.py
index bf0181954a..eb09f1eff8 100644
--- a/marketing.py
+++ b/marketing.py
@@ -8,10 +8,11 @@ from email.mime.text import MIMEText
 from email.utils import formataddr, getaddresses
 from functools import lru_cache
 from urllib.parse import (
-    parse_qs, parse_qsl, urlencode, urlsplit, urlunsplit, urljoin)
+    parse_qs, parse_qsl, urlencode, urljoin, urlsplit, urlunsplit)
 
+from genshi.core import END, START, Attrs, QName
 from genshi.template import MarkupTemplate
-from genshi.core import START, END, QName, Attrs
+
 try:
     import html2text
 except ImportError:
@@ -21,17 +22,16 @@ from trytond.config import config
 from trytond.i18n import gettext
 from trytond.ir.session import token_hex
 from trytond.model import (
-    DeactivableMixin, Workflow, ModelSQL, ModelView, Unique, fields)
+    DeactivableMixin, ModelSQL, ModelView, Unique, Workflow, fields)
 from trytond.pool import Pool
 from trytond.pyson import Eval
-from trytond.report import Report
-from trytond.report import get_email
-from trytond.sendmail import sendmail_transactional, SMTPDataManager
+from trytond.report import Report, get_email
+from trytond.sendmail import SMTPDataManager, sendmail_transactional
 from trytond.tools import grouped_slice
 from trytond.tools.email_ import set_from_header
 from trytond.transaction import Transaction
 from trytond.url import http_host
-from trytond.wizard import Wizard, StateView, StateTransition, Button
+from trytond.wizard import Button, StateTransition, StateView, Wizard
 
 from .exceptions import TemplateError
 
diff --git a/setup.py b/setup.py
index 878bd23924..8754d5bbe3 100755
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,8 @@ import io
 import os
 import re
 from configparser import ConfigParser
-from setuptools import setup, find_packages
+
+from setuptools import find_packages, setup
 
 
 def read(fname):
diff --git a/tests/__init__.py b/tests/__init__.py
index 31d9d2bc9c..23f430bfc2 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -2,7 +2,8 @@
 # this repository contains the full copyright notices and license terms.
 
 try:
-    from trytond.modules.marketing_email.tests.test_marketing_email import suite  # noqa: E501
+    from trytond.modules.marketing_email.tests.test_marketing_email import \
+        suite  # noqa: E501
 except ImportError:
     from .test_marketing_email import suite
 
diff --git a/tests/test_marketing_email.py b/tests/test_marketing_email.py
index c89f2f40de..d72121791d 100644
--- a/tests/test_marketing_email.py
+++ b/tests/test_marketing_email.py
@@ -2,15 +2,15 @@
 # this repository contains the full copyright notices and license terms.
 
 import unittest
-from unittest.mock import patch, ANY, Mock
+from unittest.mock import ANY, Mock, patch
 
 from trytond.config import config
-from trytond.pool import Pool
-from trytond.tests.test_tryton import ModuleTestCase, with_transaction
-from trytond.tests.test_tryton import suite as test_suite
-from trytond.transaction import Transaction
-
 from trytond.modules.marketing_email import marketing as marketing_module
+from trytond.pool import Pool
+from trytond.tests.test_tryton import ModuleTestCase
+from trytond.tests.test_tryton import suite as test_suite
+from trytond.tests.test_tryton import with_transaction
+from trytond.transaction import Transaction
 
 SUBSCRIBE_URL = 'http://www.example.com/subscribe'
 UNSUBSCRIBE_URL = 'http://www.example.com/unsubscribe'