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 36b119010f..f99868f089 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 stock
-from . import carrier
+
+from . import carrier, stock
 
 
 def register():
diff --git a/setup.py b/setup.py
index da83f21a73..499c351872 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/stock.py b/stock.py
index 123bebb6bf..24a31e07a5 100644
--- a/stock.py
+++ b/stock.py
@@ -1,14 +1,13 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-from decimal import Decimal, ROUND_DOWN, ROUND_HALF_EVEN
+from decimal import ROUND_DOWN, ROUND_HALF_EVEN, Decimal
 from operator import itemgetter
 
 from trytond.model import ModelView, Workflow, fields
-from trytond.pyson import Eval, Bool
-from trytond.pool import Pool, PoolMeta
-from trytond.transaction import Transaction
-
 from trytond.modules.product import price_digits, round_price
+from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Bool, Eval
+from trytond.transaction import Transaction
 
 
 class ShipmentIn(metaclass=PoolMeta):
diff --git a/tests/__init__.py b/tests/__init__.py
index 8b22afd6ba..9b2d721cbf 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.purchase_shipment_cost.tests.test_purchase_shipment_cost import suite  # noqa: E501
+    from trytond.modules.purchase_shipment_cost.tests.test_purchase_shipment_cost import \
+        suite  # noqa: E501
 except ImportError:
     from .test_purchase_shipment_cost import suite
 
diff --git a/tests/test_purchase_shipment_cost.py b/tests/test_purchase_shipment_cost.py
index 0ade05bf3d..3dba3fd177 100644
--- a/tests/test_purchase_shipment_cost.py
+++ b/tests/test_purchase_shipment_cost.py
@@ -1,12 +1,12 @@
 #!/usr/bin/env python
 # 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 PurchaseShipmentCostTestCase(ModuleTestCase):