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/carrier.py b/carrier.py
index 037e783161..f27ffaf366 100644
--- a/carrier.py
+++ b/carrier.py
@@ -3,8 +3,6 @@
 from trytond.model import fields
 from trytond.pool import PoolMeta
 
-__all__ = ['Carrier']
-
 
 class Carrier(metaclass=PoolMeta):
     __name__ = 'carrier'
diff --git a/setup.py b/setup.py
index f2453f7fc8..d550518ff8 100755
--- a/setup.py
+++ b/setup.py
@@ -87,8 +87,8 @@ setup(name=name,
     keywords='tryton purchase shipment cost',
     package_dir={'trytond.modules.purchase_shipment_cost': '.'},
     packages=(
-        ['trytond.modules.purchase_shipment_cost'] +
-        ['trytond.modules.purchase_shipment_cost.%s' % p
+        ['trytond.modules.purchase_shipment_cost']
+        + ['trytond.modules.purchase_shipment_cost.%s' % p
             for p in find_packages()]
         ),
     package_data={
@@ -103,7 +103,8 @@ setup(name=name,
         'Intended Audience :: Financial and Insurance Industry',
         'Intended Audience :: Legal Industry',
         'Intended Audience :: Manufacturing',
-        '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/stock.py b/stock.py
index 666278e59e..1e6962c79d 100644
--- a/stock.py
+++ b/stock.py
@@ -10,8 +10,6 @@ from trytond.transaction import Transaction
 
 from trytond.modules.product import price_digits
 
-__all__ = ['ShipmentIn', 'Move']
-
 
 class ShipmentIn(metaclass=PoolMeta):
     __name__ = 'stock.shipment.in'
diff --git a/tests/__init__.py b/tests/__init__.py
index 47c716df4e..8b22afd6ba 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.purchase_shipment_cost.tests.test_purchase_shipment_cost import suite
+    from trytond.modules.purchase_shipment_cost.tests.test_purchase_shipment_cost import suite  # noqa: E501
 except ImportError:
     from .test_purchase_shipment_cost import suite
 
diff --git a/tests/test_purchase_shipment_cost.py b/tests/test_purchase_shipment_cost.py
index eb30a905ac..7b2d57e9f1 100644
--- a/tests/test_purchase_shipment_cost.py
+++ b/tests/test_purchase_shipment_cost.py
@@ -28,7 +28,8 @@ def suite():
             checker=doctest_checker,
             optionflags=doctest.REPORT_ONLY_FIRST_FAILURE))
     suite.addTests(doctest.DocFileSuite(
-            'scenario_purchase_shipment_cost_with_account_stock_anglo_saxon.rst',
+            'scenario_purchase_shipment_cost_'
+            'with_account_stock_anglo_saxon.rst',
             tearDown=doctest_teardown, encoding='utf-8',
             checker=doctest_checker,
             optionflags=doctest.REPORT_ONLY_FIRST_FAILURE))