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 2d5247262c..649a2922f6 100644
--- a/__init__.py
+++ b/__init__.py
@@ -5,8 +5,7 @@ from trytond.pool import Pool
 
 __all__ = ['register']
 
-from . import ir
-from . import stock
+from . import ir, stock
 
 
 def register():
diff --git a/setup.py b/setup.py
index c81d065c27..7e6ac33e7c 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 eac98a5a10..83b188d6d7 100644
--- a/stock.py
+++ b/stock.py
@@ -5,14 +5,13 @@ from itertools import groupby
 
 from trytond.i18n import gettext
 from trytond.model import (
-    Model, ModelSQL, ModelView, Workflow, sequence_ordered, fields)
+    Model, ModelSQL, ModelView, Workflow, fields, sequence_ordered)
+from trytond.modules.company.model import (
+    employee_field, reset_employee, set_employee)
 from trytond.pool import Pool, PoolMeta
 from trytond.pyson import Eval
 from trytond.transaction import Transaction
-from trytond.wizard import Wizard, StateView, StateAction, Button
-
-from trytond.modules.company.model import (
-    set_employee, reset_employee, employee_field)
+from trytond.wizard import Button, StateAction, StateView, Wizard
 
 from .exceptions import QuantityIssueError
 
diff --git a/tests/__init__.py b/tests/__init__.py
index 6e511751db..d30348c7f9 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.stock_quantity_issue.tests.test_stock_quantity_issue import suite  # noqa: E501
+    from trytond.modules.stock_quantity_issue.tests.test_stock_quantity_issue import \
+        suite  # noqa: E501
 except ImportError:
     from .test_stock_quantity_issue import suite
 
diff --git a/tests/test_stock_quantity_issue.py b/tests/test_stock_quantity_issue.py
index 11d4ed7413..73319a5f01 100644
--- a/tests/test_stock_quantity_issue.py
+++ b/tests/test_stock_quantity_issue.py
@@ -1,16 +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.
 
+import doctest
 import unittest
 
-import doctest
-
-from trytond.tests.test_tryton import ModuleTestCase
-from trytond.tests.test_tryton import suite as test_suite
-from trytond.tests.test_tryton import doctest_teardown
-from trytond.tests.test_tryton import doctest_checker
-
 from trytond.modules.company.tests import CompanyTestMixin
+from trytond.tests.test_tryton import (
+    ModuleTestCase, doctest_checker, doctest_teardown)
+from trytond.tests.test_tryton import suite as test_suite
 
 
 class StockQuantityIssueTestCase(CompanyTestMixin, ModuleTestCase):