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 2e84b1ff5b..0cad3541a3 100644
--- a/__init__.py
+++ b/__init__.py
@@ -2,6 +2,7 @@
 # The COPYRIGHT file at the top level of this repository contains
 # the full copyright notices and license terms.
 from trytond.pool import Pool
+
 from . import purchase
 
 __all__ = ['register']
diff --git a/purchase.py b/purchase.py
index c967071580..c202c401cc 100644
--- a/purchase.py
+++ b/purchase.py
@@ -3,19 +3,19 @@
 import datetime
 from functools import wraps
 from itertools import groupby
+
 from sql.conditionals import Case
 
 from trytond.i18n import gettext
-from trytond.model import Workflow, ModelView, fields, ModelSQL
+from trytond.model import ModelSQL, ModelView, Workflow, fields
 from trytond.modules.company import CompanyReport
+from trytond.modules.currency.fields import Monetary
 from trytond.modules.product import price_digits
 from trytond.pool import Pool, PoolMeta
-from trytond.pyson import Eval, Bool, If, Id
+from trytond.pyson import Bool, Eval, Id, If
 from trytond.tools import sortable_values
 from trytond.transaction import Transaction
-from trytond.wizard import Wizard, StateView, StateTransition, Button
-
-from trytond.modules.currency.fields import Monetary
+from trytond.wizard import Button, StateTransition, StateView, Wizard
 
 from .exceptions import PreviousQuotation
 
diff --git a/setup.py b/setup.py
index a422de7aaa..ce722c3bda 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 d872341b0f..37bd793c7b 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -3,7 +3,8 @@
 # the full copyright notices and license terms.
 
 try:
-    from trytond.modules.purchase_request_quotation.tests.test_purchase_request_quotation import suite  # noqa: E501
+    from trytond.modules.purchase_request_quotation.tests.test_purchase_request_quotation import \
+        suite  # noqa: E501
 except ImportError:
     from .test_purchase_request_quotation import suite
 
diff --git a/tests/test_purchase_request_quotation.py b/tests/test_purchase_request_quotation.py
index d67cd3e047..b0ba86a646 100644
--- a/tests/test_purchase_request_quotation.py
+++ b/tests/test_purchase_request_quotation.py
@@ -1,16 +1,13 @@
 # This file is part purchase_request_for_quotation module for 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 PurchaseRequestForQuotationTestCase(CompanyTestMixin, ModuleTestCase):