doc: update header in tests
diff --git a/test/test_rs485.py b/test/test_rs485.py
index 813d6c8..01e318b 100644
--- a/test/test_rs485.py
+++ b/test/test_rs485.py
@@ -1,11 +1,9 @@
#!/usr/bin/env python
-
-# Python Serial Port Extension for Win32, Linux, BSD, Jython
-# see __init__.py
#
+# This file is part of pySerial - Cross platform serial port support for Python
# (C) 2015 Chris Liechti <cliechti@gmx.net>
-# this is distributed under a free software license, see license.txt
-
+#
+# SPDX-License-Identifier: BSD-3-Clause
"""\
Test RS485 related functionality.
"""