I wasn’t sure why you chose to volunteer me as a coordinator in first place 
it helps to ask.
Thank you for wanting to lead this effort.
FYI, your main contact will be with @sgugger and @jeremy, who wrote 99% of the library and know it the best to tell whether the proposed tests are good ones or not.
p.s. I moved the last few posts on this topic to the thread you created where they belong.