diff --git a/__init__.py b/__init__.py
index 595b1d745e..5da4c27629 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,5 +1,5 @@
-#This file is part of Tryton.  The COPYRIGHT file at the top level of
-#this repository contains the full copyright notices and license terms.
+# 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 trytond.pool import Pool
 from .party import *
diff --git a/invoice.py b/invoice.py
index 912e0546c6..2b4bb668a8 100644
--- a/invoice.py
+++ b/invoice.py
@@ -1,5 +1,5 @@
-#This file is part of Tryton.  The COPYRIGHT file at the top level of
-#this repository contains the full copyright notices and license terms.
+# 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 datetime
 
 from trytond.model import ModelView, Workflow, fields
diff --git a/party.py b/party.py
index b9011ed9ea..23beec902f 100644
--- a/party.py
+++ b/party.py
@@ -1,5 +1,5 @@
-#This file is part of Tryton.  The COPYRIGHT file at the top level of
-#this repository contains the full copyright notices and license terms.
+# 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 trytond.pool import PoolMeta
 
 __all__ = ['Party', 'Address']
diff --git a/payment_term.py b/payment_term.py
index 54a5e69dcd..a17112198b 100644
--- a/payment_term.py
+++ b/payment_term.py
@@ -1,5 +1,5 @@
-#This file is part of Tryton.  The COPYRIGHT file at the top level of
-#this repository contains the full copyright notices and license terms.
+# 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 trytond.pool import PoolMeta
 
 __all__ = ['PaymentTerm', 'PaymentTermLine']
diff --git a/setup.py b/setup.py
index 9724a7a14a..463baa82d8 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
-#This file is part of Tryton.  The COPYRIGHT file at the top level of
-#this repository contains the full copyright notices and license terms.
+# 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 setuptools import setup
 import re
diff --git a/tests/__init__.py b/tests/__init__.py
index 3953eab6dd..65cdb6e8f1 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,5 +1,5 @@
-#This file is part of Tryton.  The COPYRIGHT file at the top level of
-#this repository contains the full copyright notices and license terms.
+# 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 .test_account_invoice_history import suite
 
diff --git a/tests/test_account_invoice_history.py b/tests/test_account_invoice_history.py
index da95f3ac4c..7b3451b64e 100644
--- a/tests/test_account_invoice_history.py
+++ b/tests/test_account_invoice_history.py
@@ -1,5 +1,5 @@
-#This file is part of Tryton.  The COPYRIGHT file at the top level of
-#this repository contains the full copyright notices and license terms.
+# 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 trytond.tests.test_tryton
 from trytond.tests.test_tryton import test_depends