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 60f222dd63..40283c69a9 100644
--- a/__init__.py
+++ b/__init__.py
@@ -2,8 +2,8 @@
 # this repository contains the full copyright notices and license terms.
 
 from trytond.pool import Pool
-from . import party
-from . import address
+
+from . import address, party
 
 
 def register():
diff --git a/address.py b/address.py
index 83951ff225..bc29fc1e74 100644
--- a/address.py
+++ b/address.py
@@ -3,6 +3,7 @@
 from trytond.i18n import gettext
 from trytond.model import fields
 from trytond.pool import PoolMeta
+
 from . import luhn
 from .exceptions import SIRETValidationError
 
diff --git a/party.py b/party.py
index 34918085f7..1b358d75cb 100644
--- a/party.py
+++ b/party.py
@@ -3,6 +3,7 @@
 from trytond.i18n import gettext
 from trytond.model import fields
 from trytond.pool import PoolMeta
+
 from . import luhn
 from .exceptions import SIRENValidationError
 
diff --git a/setup.py b/setup.py
index 0b3362cb21..244cc28e07 100755
--- a/setup.py
+++ b/setup.py
@@ -2,11 +2,12 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 
-import re
-import os
 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/test_party_siret.py b/tests/test_party_siret.py
index 02a995bb86..ec83e8fc66 100644
--- a/tests/test_party_siret.py
+++ b/tests/test_party_siret.py
@@ -1,9 +1,10 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 import unittest
+
 import trytond.tests.test_tryton
-from trytond.tests.test_tryton import ModuleTestCase
 from trytond.modules.party_siret import luhn
+from trytond.tests.test_tryton import ModuleTestCase
 
 
 class PartySiretTestCase(ModuleTestCase):