There is 100% mythic testing on the PTR realm for raid tiers. The current batch of mythic testing has been over for awhile now, like twoish weeks now. The soulrender testing was on may 20th which you can see in this wowhead article here: ptr.wowhead.com/news/sanctum-of-domination-raid-testing-may-20-and-21-more-mythic-testing-and-lfr-322404
wow is a dying game...
Theres no mythic raid in ptr :)
There is 100% mythic testing on the PTR realm for raid tiers. The current batch of mythic testing has been over for awhile now, like twoish weeks now. The soulrender testing was on may 20th which you can see in this wowhead article here: ptr.wowhead.com/news/sanctum-of-domination-raid-testing-may-20-and-21-more-mythic-testing-and-lfr-322404