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 065d1d2fcf..f9997511b9 100644
--- a/__init__.py
+++ b/__init__.py
@@ -2,9 +2,8 @@
 # this repository contains the full copyright notices and license terms.
 
 from trytond.pool import Pool
-from . import party
-from . import sale
-from . import configuration
+
+from . import configuration, party, sale
 
 
 def register():
diff --git a/party.py b/party.py
index a09bc74cdf..0b2b45448f 100644
--- a/party.py
+++ b/party.py
@@ -2,7 +2,7 @@
 # repository contains the full copyright notices and license terms.
 from trytond import backend
 from trytond.model import ModelSQL, ValueMixin, fields
-from trytond.pool import PoolMeta, Pool
+from trytond.pool import Pool, PoolMeta
 from trytond.tools.multivalue import migrate_property
 
 
diff --git a/setup.py b/setup.py
index 9eac5b3a02..c6ebbf954f 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 8bd6efb85c..6323ce4bf9 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.sale_invoice_grouping.tests.test_sale_invoice_grouping import suite  # noqa: E501
+    from trytond.modules.sale_invoice_grouping.tests.test_sale_invoice_grouping import \
+        suite  # noqa: E501
 except ImportError:
     from .test_sale_invoice_grouping import suite
 
diff --git a/tests/test_sale_invoice_grouping.py b/tests/test_sale_invoice_grouping.py
index 4de41b64a0..82c4c07a2d 100644
--- a/tests/test_sale_invoice_grouping.py
+++ b/tests/test_sale_invoice_grouping.py
@@ -1,11 +1,11 @@
 # 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 doctest
+import unittest
+
 import trytond.tests.test_tryton
-from trytond.tests.test_tryton import ModuleTestCase
-from trytond.tests.test_tryton import doctest_teardown
-from trytond.tests.test_tryton import doctest_checker
+from trytond.tests.test_tryton import (
+    ModuleTestCase, doctest_checker, doctest_teardown)
 
 
 class SaleInvoiceGroupingTestCase(ModuleTestCase):