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 fd0c2f799c..94d954a225 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 product
-from . import stock
-from . import invoice
-from . import account
+
+from . import account, invoice, product, stock
 
 
 def register():
diff --git a/invoice.py b/invoice.py
index 42e830baaa..630a5e257b 100644
--- a/invoice.py
+++ b/invoice.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 decimal import Decimal
 import operator
+from decimal import Decimal
 
 from trytond.i18n import gettext
 from trytond.pool import Pool, PoolMeta
diff --git a/product.py b/product.py
index d503aa4c28..4a7f3ae8f1 100644
--- a/product.py
+++ b/product.py
@@ -2,11 +2,10 @@
 # this repository contains the full copyright notices and license terms.
 from trytond import backend
 from trytond.model import fields
-from trytond.pyson import Eval
-from trytond.pool import PoolMeta, Pool
-
 from trytond.modules.account_product.product import (
     account_used, template_property)
+from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Eval
 
 
 class Category(metaclass=PoolMeta):
diff --git a/setup.py b/setup.py
index e4109bed07..ff8abe126b 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 6b8f5e1167..a12b90a090 100644
--- a/stock.py
+++ b/stock.py
@@ -1,7 +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 decimal import Decimal
-from trytond.model import fields, Check
+
+from trytond.model import Check, fields
 from trytond.pool import Pool, PoolMeta
 from trytond.transaction import Transaction
 
diff --git a/tests/__init__.py b/tests/__init__.py
index aaf06da91b..e048831d65 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_stock_anglo_saxon.tests.test_account_stock_anglo_saxon import suite  # noqa: E501
+    from trytond.modules.account_stock_anglo_saxon.tests.test_account_stock_anglo_saxon import \
+        suite  # noqa: E501
 except ImportError:
     from .test_account_stock_anglo_saxon import suite
 
diff --git a/tests/test_account_stock_anglo_saxon.py b/tests/test_account_stock_anglo_saxon.py
index 65048483ef..092da30699 100644
--- a/tests/test_account_stock_anglo_saxon.py
+++ b/tests/test_account_stock_anglo_saxon.py
@@ -1,15 +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 unittest
 import doctest
-
+import unittest
 from unittest.mock import Mock, patch
 
 import trytond.tests.test_tryton
-from trytond.tests.test_tryton import ModuleTestCase, with_transaction
-from trytond.tests.test_tryton import doctest_teardown
-from trytond.tests.test_tryton import doctest_checker
 from trytond.pool import Pool
+from trytond.tests.test_tryton import (
+    ModuleTestCase, doctest_checker, doctest_teardown, with_transaction)
 
 
 class AccountStockAngloSaxonTestCase(ModuleTestCase):