diff --git a/can/interfaces/gs_usb.py b/can/interfaces/gs_usb.py
index ff6ba634e..447cdf47f 100644
--- a/can/interfaces/gs_usb.py
+++ b/can/interfaces/gs_usb.py
@@ -1,4 +1,4 @@
-from typing import cast, Any, Iterator, List, Optional, Sequence, Tuple, Union
+from typing import Optional, Tuple
 
 from gs_usb.gs_usb import GsUsb
 from gs_usb.gs_usb_frame import GsUsbFrame
diff --git a/can/interfaces/nixnet.py b/can/interfaces/nixnet.py
index f8b54ea4e..993c215dd 100644
--- a/can/interfaces/nixnet.py
+++ b/can/interfaces/nixnet.py
@@ -1,5 +1,3 @@
-# coding: utf-8
-
 """
 NI-XNET interface module.
 
diff --git a/test/__init__.py b/test/__init__.py
index 394a0a067..4265cc3e6 100644
--- a/test/__init__.py
+++ b/test/__init__.py
@@ -1,2 +1 @@
 #!/usr/bin/env python
-# coding: utf-8
diff --git a/test/back2back_test.py b/test/back2back_test.py
index 1950c5fa5..66104a43e 100644
--- a/test/back2back_test.py
+++ b/test/back2back_test.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 """
 This module tests two buses attached to each other.
diff --git a/test/config.py b/test/config.py
index 58ad780fc..fc1bca6c2 100644
--- a/test/config.py
+++ b/test/config.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 """
 This module contains various configuration for the tests.
diff --git a/test/contextmanager_test.py b/test/contextmanager_test.py
index 95785b128..014dfb121 100644
--- a/test/contextmanager_test.py
+++ b/test/contextmanager_test.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 """
 This module tests the context manager of Bus and Notifier classes
diff --git a/test/data/__init__.py b/test/data/__init__.py
index 394a0a067..4265cc3e6 100644
--- a/test/data/__init__.py
+++ b/test/data/__init__.py
@@ -1,2 +1 @@
 #!/usr/bin/env python
-# coding: utf-8
diff --git a/test/data/example_data.py b/test/data/example_data.py
index d642887cf..d41544334 100644
--- a/test/data/example_data.py
+++ b/test/data/example_data.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 """
 This module contains some example data, like messages of different
diff --git a/test/listener_test.py b/test/listener_test.py
index 83b4a63fc..e5abd94a2 100644
--- a/test/listener_test.py
+++ b/test/listener_test.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 """
 """
diff --git a/test/logformats_test.py b/test/logformats_test.py
index 8bdb4c215..ae3106aa7 100644
--- a/test/logformats_test.py
+++ b/test/logformats_test.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 """
 This test module test the separate reader/writer combinations of the can.io.*
diff --git a/test/message_helper.py b/test/message_helper.py
index 5f437dbde..1e7989156 100644
--- a/test/message_helper.py
+++ b/test/message_helper.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 """
 This module contains a helper for writing test cases that need to compare messages.
diff --git a/test/network_test.py b/test/network_test.py
index ad02fae41..a4e40e901 100644
--- a/test/network_test.py
+++ b/test/network_test.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 
 import unittest
diff --git a/test/notifier_test.py b/test/notifier_test.py
index 0a60bd25d..c9d8f4a27 100644
--- a/test/notifier_test.py
+++ b/test/notifier_test.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 import unittest
 import time
diff --git a/test/serial_test.py b/test/serial_test.py
index 29f1ea2b3..c9c035634 100644
--- a/test/serial_test.py
+++ b/test/serial_test.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 """
 This module is testing the serial interface.
diff --git a/test/simplecyclic_test.py b/test/simplecyclic_test.py
index 82f0850a7..4b9ded43f 100644
--- a/test/simplecyclic_test.py
+++ b/test/simplecyclic_test.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 """
 This module tests cyclic send tasks.
diff --git a/test/test_kvaser.py b/test/test_kvaser.py
index 3acc2731d..2637ae0e7 100644
--- a/test/test_kvaser.py
+++ b/test/test_kvaser.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 """
 """