set up a shib testing page
"All centers are required to provide a test URI and make this (or a similar script) avilable and add the URIs the above list."
[This page] (https://www.clarin.eu/content/testing-which-attributes-identity-provider-releases) describes how to set up such a test page. You can download [shib_test.pl] (https://svn.clarin.eu/aai/shib_test/shib_test.pl) as a starting point.