doc: update header in tests
diff --git a/test/test_readline.py b/test/test_readline.py
index 677ce85..61381f4 100644
--- a/test/test_readline.py
+++ b/test/test_readline.py
@@ -1,10 +1,9 @@
#! /usr/bin/env python
-# Python Serial Port Extension for Win32, Linux, BSD, Jython
-# see __init__.py
#
-# (C) 2010 Chris Liechti <cliechti@gmx.net>
-# this is distributed under a free software license, see license.txt
-
+# This file is part of pySerial - Cross platform serial port support for Python
+# (C) 2010-2015 Chris Liechti <cliechti@gmx.net>
+#
+# SPDX-License-Identifier: BSD-3-Clause
"""\
Some tests for the serial module.
Part of pyserial (http://pyserial.sf.net) (C)2010 cliechti@gmx.net