diff -up CherryPy-2.3.0/cherrypy/test/webtest.py.broken_tests CherryPy-2.3.0/cherrypy/test/webtest.py
--- CherryPy-2.3.0/cherrypy/test/webtest.py.broken_tests	2010-07-28 18:31:14.000000000 +0200
+++ CherryPy-2.3.0/cherrypy/test/webtest.py	2010-07-28 18:31:53.000000000 +0200
@@ -485,7 +485,7 @@ def openURL(url, headers=None, method="G
                                 skip_accept_encoding=True)
             
             for key, value in headers:
-                conn.putheader(key, value)
+                conn.putheader(key, str(value))
             conn.endheaders()
             
             if body is not None: