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diff --git a/test/test_iolib.py b/test/test_iolib.py
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+++ b/test/test_iolib.py
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+#! /usr/bin/env python
+#
+# Python Serial Port Extension for Win32, Linux, BSD, Jython
+# see __init__.py
+#
+# (C) 2001-2008 Chris Liechti <cliechti@gmx.net>
+# this is distributed under a free software license, see license.txt
+
+"""\
+Some tests for the serial module.
+Part of pyserial (http://pyserial.sf.net)  (C)2001-2009 cliechti@gmx.net
+
+Intended to be run on different platforms, to ensure portability of
+the code.
+
+This modules contains test for the interaction between Serial and the io
+library. This only works on Python 2.6+ that introduced the io library.
+
+For all these tests a simple hardware is required.
+Loopback HW adapter:
+Shortcut these pin pairs:
+ TX  <-> RX
+ RTS <-> CTS
+ DTR <-> DSR
+
+On a 9 pole DSUB these are the pins (2-3) (4-6) (7-8)
+"""
+
+import unittest
+import sys
+
+if __name__ == '__main__'  and sys.version_info < (2, 6):
+    sys.stderr.write("""\
+==============================================================================
+WARNING: this test is intended for Python 2.6 and newer where the io library
+is available. This seems to be an older version of Python running.
+Continuing anyway...
+==============================================================================
+""")
+
+import io
+import serial
+
+# trick to make that this test run under 2.6 and 3.x without modification.
+# problem is, io library on 2.6 does NOT accept type 'str' and 3.x doesn't
+# like u'nicode' strings with the prefix and it is not providing an unicode
+# function ('str' is now what 'unicode' used to be)
+if sys.version_info >= (3, 0):
+    def unicode(x): return x
+
+
+# on which port should the tests be performed:
+PORT = 0
+
+class Test_SerialAndIO(unittest.TestCase):
+
+    def setUp(self):
+        self.s = serial.serial_for_url(PORT, timeout=1)
+        self.io = io.TextIOWrapper(io.BufferedRWPair(self.s, self.s))
+
+    def tearDown(self):
+        self.s.close()
+
+    def test_hello_raw(self):
+        self.io.write(unicode("hello\n"))
+        self.io.flush() # it is buffering. required to get the data out
+        hello = self.io.readline()
+        self.failUnlessEqual(hello, unicode("hello\n"))
+
+
+if __name__ == '__main__':
+    import sys
+    sys.stdout.write(__doc__)
+    if len(sys.argv) > 1:
+        PORT = sys.argv[1]
+    sys.stdout.write("Testing port: %r\n" % PORT)
+    sys.argv[1:] = ['-v']
+    # When this module is executed from the command-line, it runs all its tests
+    unittest.main()