The latest version is that of 2015-06-22. You can get the tar file for this version below:
Version of 2015-06-22You can read the documentation in the README file (which is in the tar file as well).
Here are older versions of these tests:
Version of 2014-10-04
Version of 2013-11-25
Version of 2013-07-23
Version of 2013-06-18
Version of 2011-06-08