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 c691c3e6e2..4def8f2788 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 account
-from . import sale
-from . import purchase
-from . import stock
+
+from . import account, purchase, sale, stock
 
 
 def register():
diff --git a/account.py b/account.py
index d8fda8a0e3..0b81fdee9f 100644
--- a/account.py
+++ b/account.py
@@ -1,8 +1,8 @@
 # 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 trytond.pool import Pool, PoolMeta
 from trytond.model import fields
+from trytond.pool import Pool, PoolMeta
 from trytond.pyson import Eval
 
 
diff --git a/purchase.py b/purchase.py
index 1bc03e97a6..8a31dbf5c6 100644
--- a/purchase.py
+++ b/purchase.py
@@ -1,8 +1,8 @@
 # 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 trytond.pool import PoolMeta
 from trytond.model import fields
+from trytond.pool import PoolMeta
 from trytond.pyson import Eval
 
 
diff --git a/sale.py b/sale.py
index 6bc1b64474..b458abda26 100644
--- a/sale.py
+++ b/sale.py
@@ -1,8 +1,8 @@
 # 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 trytond.pool import Pool, PoolMeta
 from trytond.model import fields
+from trytond.pool import Pool, PoolMeta
 from trytond.pyson import Eval
 
 
diff --git a/setup.py b/setup.py
index c1b3a572ad..a05c740d61 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 302cd70484..0c5b167173 100644
--- a/stock.py
+++ b/stock.py
@@ -1,7 +1,7 @@
 # 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 trytond.pool import PoolMeta, Pool
+from trytond.pool import Pool, PoolMeta
 
 
 class Move(metaclass=PoolMeta):
diff --git a/tests/__init__.py b/tests/__init__.py
index 01aa0c6f88..b4fb641568 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.account_tax_rule_country.tests.test_account_tax_rule_country import suite  # noqa: E501
+    from trytond.modules.account_tax_rule_country.tests.test_account_tax_rule_country import \
+        suite  # noqa: E501
 except ImportError:
     from .test_account_tax_rule_country import suite
 
diff --git a/tests/test_account_tax_rule_country.py b/tests/test_account_tax_rule_country.py
index e19a5dd872..9588ee1922 100644
--- a/tests/test_account_tax_rule_country.py
+++ b/tests/test_account_tax_rule_country.py
@@ -2,13 +2,12 @@
 # this repository contains the full copyright notices and license terms.
 import unittest
 
-from trytond.pool import Pool
 import trytond.tests.test_tryton
-from trytond.tests.test_tryton import ModuleTestCase, with_transaction
-
-from trytond.modules.company.tests import (
-    create_company, set_company, CompanyTestMixin)
 from trytond.modules.account.tests import create_chart
+from trytond.modules.company.tests import (
+    CompanyTestMixin, create_company, set_company)
+from trytond.pool import Pool
+from trytond.tests.test_tryton import ModuleTestCase, with_transaction
 
 
 class AccountTaxRuleCountryTestCase(CompanyTestMixin, ModuleTestCase):