diff --git a/.flake8 b/.flake8
new file mode 100644
index 0000000000..bb03d08a82
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,2 @@
+[flake8]
+ignore=E123,E124,E126,E128,W503
diff --git a/account.py b/account.py
index 80455bc3b8..6a8505bc60 100644
--- a/account.py
+++ b/account.py
@@ -6,7 +6,6 @@ from trytond.transaction import Transaction
 from trytond.pyson import Eval
 from trytond.modules.company.model import CompanyValueMixin
 
-__all__ = ['Configuration', 'ConfigurationDefaultCreditLimitAmount', 'Level']
 default_credit_limit_amount = fields.Numeric(
     "Default Credit Limit Amount",
     help="The default credit limit amount for new customers.",
diff --git a/party.py b/party.py
index 5100434374..8c25f02606 100644
--- a/party.py
+++ b/party.py
@@ -11,8 +11,6 @@ from trytond.modules.company.model import CompanyValueMixin
 
 from .exceptions import CreditLimitError, CreditLimitWarning
 
-__all__ = ['Party', 'PartyCreditLimitAmount']
-
 
 class Party(metaclass=PoolMeta):
     __name__ = 'party.party'
diff --git a/setup.py b/setup.py
index 2f11bf4168..e7c4a2054e 100755
--- a/setup.py
+++ b/setup.py
@@ -79,8 +79,8 @@ setup(name=name,
     keywords='tryton account credit limit',
     package_dir={'trytond.modules.account_credit_limit': '.'},
     packages=(
-        ['trytond.modules.account_credit_limit'] +
-        ['trytond.modules.account_credit_limit.%s' % p
+        ['trytond.modules.account_credit_limit']
+        + ['trytond.modules.account_credit_limit.%s' % p
             for p in find_packages()]
         ),
     package_data={
@@ -94,7 +94,8 @@ setup(name=name,
         'Intended Audience :: Developers',
         'Intended Audience :: Financial and Insurance Industry',
         'Intended Audience :: Legal Industry',
-        'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',
+        'License :: OSI Approved :: '
+        'GNU General Public License v3 or later (GPLv3+)',
         'Natural Language :: Bulgarian',
         'Natural Language :: Catalan',
         'Natural Language :: Chinese (Simplified)',
diff --git a/tests/__init__.py b/tests/__init__.py
index 8c26e6e209..9b39b4a2b9 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -2,7 +2,7 @@
 # this repository contains the full copyright notices and license terms.
 
 try:
-    from trytond.modules.account_credit_limit.tests.test_account_credit_limit import suite
+    from trytond.modules.account_credit_limit.tests.test_account_credit_limit import suite  # noqa: E501
 except ImportError:
     from .test_account_credit_limit import suite