There was available from Hans Leeb at The University of Salzberg a RNG tester programme. I don't think it was ever on their site, but you emailed Leeb and he would send it to you. It is some years since I last spoke to him, but I am sure he would be pleased to help. A student of mine used it to validate some simulation work he did.

It would appear that Hans is not at the University of Vienna, here is his current web page

jdtoronto