I didn't see any openSUSE specific instructions for running xfstests, so I put together a simple wiki page:
Is anyone running xfstests on factory for btrfs?
=== I just tried it for 11.4 with Kernel:Head (3.0-rc6 I think).
I got 3 failed tests. But it almost looks like that's normal. ie. It looks like issues with the test infrastructure, not xfstests itself.
My GSoC student is working on xfstests to add some snapshot specific tests, so it could be a local issue on our end.