Bone-tester board information available?

I’m trying to run some validation scripts on beaglebones and I saw the bone-tester recipe in https://github.com/jadonk/validation-scripts.
There are various references to a ‘test board’ of sorts, is there any information about this board available?
Thanks!

Tester is for production use only that runs all the test scripts automatically without a lot of user intervention. This information is not made public.

Gerald