diff --git a/api-ref/source/conf.py b/api-ref/source/conf.py
index d02cfd7e8..ad20fb3fc 100644
--- a/api-ref/source/conf.py
+++ b/api-ref/source/conf.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-#
 # Licensed under the Apache License, Version 2.0 (the "License"); you may
 # not use this file except in compliance with the License. You may obtain
 # a copy of the License at
diff --git a/doc/source/conf.py b/doc/source/conf.py
index babaf0700..f7b96f92f 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 4eaf48ee3..42e4469d5 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
diff --git a/zaqar/tests/tempest_plugin/tests/v2/test_claims_negative.py b/zaqar/tests/tempest_plugin/tests/v2/test_claims_negative.py
index 39462b6c7..4804f9b65 100644
--- a/zaqar/tests/tempest_plugin/tests/v2/test_claims_negative.py
+++ b/zaqar/tests/tempest_plugin/tests/v2/test_claims_negative.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (c) 2016 LARSEN & TOUBRO LIMITED. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/zaqar/tests/tempest_plugin/tests/v2/test_queues_negative.py b/zaqar/tests/tempest_plugin/tests/v2/test_queues_negative.py
index b34e61574..586f1b1c6 100644
--- a/zaqar/tests/tempest_plugin/tests/v2/test_queues_negative.py
+++ b/zaqar/tests/tempest_plugin/tests/v2/test_queues_negative.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (c) 2016 LARSEN & TOUBRO LIMITED. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");