diff --git a/doc/source/conf.py b/doc/source/conf.py
index cfb10624..64c4c71a 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 b4720d63..730247e8 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/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/tests/unit/transport/test_ws.py b/tests/unit/transport/test_ws.py
index 20abfde7..aad30de5 100644
--- a/tests/unit/transport/test_ws.py
+++ b/tests/unit/transport/test_ws.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