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 7b2948584e..61e92b35d5 100644
--- a/__init__.py
+++ b/__init__.py
@@ -2,13 +2,9 @@
 # this repository contains the full copyright notices and license terms.
 
 from trytond.pool import Pool
-from . import opportunity
-from . import configuration
-from . import sale
-from . import party
-from . import account
-from . import product
-from . import company
+
+from . import (
+    account, company, configuration, opportunity, party, product, sale)
 
 
 def register():
diff --git a/configuration.py b/configuration.py
index ae90fed2c3..d41bd03e92 100644
--- a/configuration.py
+++ b/configuration.py
@@ -2,8 +2,8 @@
 # this repository contains the full copyright notices and license terms.
 from trytond import backend
 from trytond.model import fields
+from trytond.pool import Pool, PoolMeta
 from trytond.pyson import Eval, Id
-from trytond.pool import PoolMeta, Pool
 
 
 class Configuration(metaclass=PoolMeta):
diff --git a/opportunity.py b/opportunity.py
index d4c8ac9b86..e9a4e273eb 100644
--- a/opportunity.py
+++ b/opportunity.py
@@ -4,22 +4,21 @@
 import datetime
 
 from sql import Literal, Null
-from sql.aggregate import Max, Count, Sum
+from sql.aggregate import Count, Max, Sum
 from sql.conditionals import Case, Coalesce
 from sql.functions import Extract
 
 from trytond.i18n import gettext
-from trytond.model import ModelView, ModelSQL, Workflow, fields, \
-    sequence_ordered
-from trytond.model.exceptions import AccessError
-from trytond.pyson import Eval, In, If, Get, Bool
-from trytond.transaction import Transaction
-from trytond.pool import Pool
-
 from trytond.ir.attachment import AttachmentCopyMixin
 from trytond.ir.note import NoteCopyMixin
+from trytond.model import (
+    ModelSQL, ModelView, Workflow, fields, sequence_ordered)
+from trytond.model.exceptions import AccessError
 from trytond.modules.company.model import employee_field, set_employee
 from trytond.modules.currency.fields import Monetary
+from trytond.pool import Pool
+from trytond.pyson import Bool, Eval, Get, If, In
+from trytond.transaction import Transaction
 
 
 class SaleOpportunity(
diff --git a/sale.py b/sale.py
index 3dd377e68a..d39cd4c80d 100644
--- a/sale.py
+++ b/sale.py
@@ -4,7 +4,7 @@ from functools import wraps
 
 from trytond.i18n import gettext
 from trytond.model.exceptions import AccessError
-from trytond.pool import PoolMeta, Pool
+from trytond.pool import Pool, PoolMeta
 from trytond.transaction import Transaction
 
 
diff --git a/setup.py b/setup.py
index 296c57bcd4..9dbe5a0366 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 10c1f40590..2c1b1855e3 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.sale_opportunity.tests.test_sale_opportunity import suite  # noqa: E501
+    from trytond.modules.sale_opportunity.tests.test_sale_opportunity import \
+        suite  # noqa: E501
 except ImportError:
     from .test_sale_opportunity import suite
 
diff --git a/tests/test_sale_opportunity.py b/tests/test_sale_opportunity.py
index e3048729a9..e07af3709d 100644
--- a/tests/test_sale_opportunity.py
+++ b/tests/test_sale_opportunity.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 SaleOpportunityTestCase(CompanyTestMixin, ModuleTestCase):