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 3967171fea..bbfd02a2bf 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 journal
-from . import statement
-from . import account
-from . import party
+
+from . import account, journal, party, statement
 
 
 def register():
diff --git a/account.py b/account.py
index 450de10e93..ef4ebcaa79 100644
--- a/account.py
+++ b/account.py
@@ -7,11 +7,10 @@ from sql.operators import Concat
 
 from trytond.i18n import gettext
 from trytond.model import ModelView
-from trytond.pool import PoolMeta, Pool
-from trytond.transaction import Transaction
-from trytond.tools import grouped_slice, reduce_ids
-
 from trytond.modules.account.exceptions import PostError
+from trytond.pool import Pool, PoolMeta
+from trytond.tools import grouped_slice, reduce_ids
+from trytond.transaction import Transaction
 
 
 class Journal(metaclass=PoolMeta):
diff --git a/journal.py b/journal.py
index 2945063c5e..49e4b92fa4 100644
--- a/journal.py
+++ b/journal.py
@@ -3,10 +3,10 @@
 from sql import Table
 
 from trytond import backend
-from trytond.model import ModelView, ModelSQL, DeactivableMixin, fields, Unique
-from trytond.transaction import Transaction
+from trytond.model import DeactivableMixin, ModelSQL, ModelView, Unique, fields
 from trytond.pool import Pool
 from trytond.pyson import Eval
+from trytond.transaction import Transaction
 
 
 class Journal(DeactivableMixin, ModelSQL, ModelView):
diff --git a/setup.py b/setup.py
index 6626e76759..d57e84b852 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/statement.py b/statement.py
index 3fffb1c97a..30cb672564 100644
--- a/statement.py
+++ b/statement.py
@@ -1,28 +1,29 @@
 # 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 collections import defaultdict, namedtuple
 from decimal import Decimal
-from collections import namedtuple, defaultdict
 from itertools import groupby
 
 from sql import Null
-from sql.conditionals import Coalesce
 from sql.aggregate import Max, Sum
+from sql.conditionals import Coalesce
 
 from trytond.config import config
 from trytond.i18n import gettext
-from trytond.model import Workflow, ModelView, ModelSQL, fields, Check, \
-    sequence_ordered, DictSchemaMixin
+from trytond.model import (
+    Check, DictSchemaMixin, ModelSQL, ModelView, Workflow, fields,
+    sequence_ordered)
 from trytond.model.exceptions import AccessError
-from trytond.pyson import Eval, If, Bool
-from trytond.transaction import Transaction
-from trytond.pool import Pool
-from trytond.rpc import RPC
-from trytond.wizard import Wizard, StateView, StateAction, Button
 from trytond.modules.company import CompanyReport
 from trytond.modules.currency.fields import Monetary
+from trytond.pool import Pool
+from trytond.pyson import Bool, Eval, If
+from trytond.rpc import RPC
+from trytond.transaction import Transaction
+from trytond.wizard import Button, StateAction, StateView, Wizard
 
 from .exceptions import (
-    StatementValidateError, StatementValidateWarning, StatementPostError)
+    StatementPostError, StatementValidateError, StatementValidateWarning)
 
 if config.getboolean('account_statement', 'filestore', default=False):
     file_id = 'origin_file_id'
diff --git a/tests/__init__.py b/tests/__init__.py
index a0c6aba0ff..1ae9b49603 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_statement.tests.test_account_statement import suite  # noqa: E501
+    from trytond.modules.account_statement.tests.test_account_statement import \
+        suite  # noqa: E501
 except ImportError:
     from .test_account_statement import suite
 
diff --git a/tests/test_account_statement.py b/tests/test_account_statement.py
index 390c1ae116..1df9832fed 100644
--- a/tests/test_account_statement.py
+++ b/tests/test_account_statement.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 AccountStatementTestCase(CompanyTestMixin, ModuleTestCase):