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 8accc56477..b203a1383f 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 work
-from . import routing
-from . import production
+
+from . import production, routing, work
 
 
 def register():
diff --git a/production.py b/production.py
index 2bebfcdf9f..56bf3ea15f 100644
--- a/production.py
+++ b/production.py
@@ -5,13 +5,12 @@ from decimal import Decimal
 from sql.aggregate import Sum
 
 from trytond.i18n import gettext
-from trytond.pool import PoolMeta, Pool
 from trytond.model import ModelView, Workflow, fields
 from trytond.model.exceptions import AccessError
-from trytond.pyson import Eval, Bool
-from trytond.transaction import Transaction
-
 from trytond.modules.product import round_price
+from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Bool, Eval
+from trytond.transaction import Transaction
 
 
 class Production(metaclass=PoolMeta):
diff --git a/routing.py b/routing.py
index e66754e967..ac0168ab0c 100644
--- a/routing.py
+++ b/routing.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.model import fields
+from trytond.pool import Pool, PoolMeta
 
 
 class Operation(metaclass=PoolMeta):
diff --git a/setup.py b/setup.py
index 330974cc40..57c24926e8 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 b957db350b..8922858b7e 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.production_work.tests.test_production_work import suite  # noqa: E501
+    from trytond.modules.production_work.tests.test_production_work import \
+        suite  # noqa: E501
 except ImportError:
     from .test_production_work import suite
 
diff --git a/tests/test_production_work.py b/tests/test_production_work.py
index d42c31f46a..9d89362d04 100644
--- a/tests/test_production_work.py
+++ b/tests/test_production_work.py
@@ -1,13 +1,12 @@
 # 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 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
+import unittest
 
+import trytond.tests.test_tryton
 from trytond.modules.company.tests import CompanyTestMixin
+from trytond.tests.test_tryton import (
+    ModuleTestCase, doctest_checker, doctest_teardown)
 
 
 class ProductionWorkTestCase(CompanyTestMixin, ModuleTestCase):
diff --git a/work.py b/work.py
index 7af4642f1a..f7f0ec3494 100644
--- a/work.py
+++ b/work.py
@@ -7,14 +7,14 @@ from functools import wraps
 
 from trytond.i18n import gettext
 from trytond.model import (
-    ModelSQL, ModelView, Workflow, DeactivableMixin, fields, sequence_ordered,
+    DeactivableMixin, ModelSQL, ModelView, Workflow, fields, sequence_ordered,
     tree)
 from trytond.model.exceptions import AccessError
+from trytond.modules.product import price_digits, round_price
 from trytond.pool import Pool
-from trytond.pyson import Eval, If, Bool
+from trytond.pyson import Bool, Eval, If
 from trytond.transaction import Transaction
 
-from trytond.modules.product import price_digits, round_price
 from .exceptions import PickerError