We get an error for this, and the second line is ignored. webkit.org/b/85523 fullscreen/full-screen-iframe-legacy.html [ Pass Failure ] webkit.org/b/85523 [ Yosemite ] fullscreen/full-screen-iframe-legacy.html [ Pass Failure Timeout ] I don't see the logic behind this, seems like a bug. LayoutTests/platform/mac/TestExpectations:380 More specific entry for fullscreen/full-screen-iframe-legacy.html on line LayoutTests/platform/mac/TestExpectations:379 overrides line LayoutTests/platform/mac/TestExpectations:380. fullscreen/full-screen-iframe-legacy.html
This looks like a duplicate of https://bugs.webkit.org/show_bug.cgi?id=120081 (found it because I had the exact same question as you :))
Indeed, seems likely to share the root cause. Good catch! I don't know if I want to dupe the bugs - given that you found this one, it may be easier to discover.
Agreed, this one is easier to find.