https://build.webkit.org/builders/Apple%20El%20Capitan%20Release%20WK2%20%28Perf%29/builds/3045 Running Animation/css-accelerated-animation.html (2 of 152) ERROR: layer at (0,0) size 800x600 FAILED Finished: 0.622013 s
Added with https://trac.webkit.org/changeset/205680
It just needs to be skipped.
https://trac.webkit.org/r205751