Noticed this issue when working on https://bugs.webkit.org/show_bug.cgi?id=219982, it's a pretty simple fix and makes test-webkitpy much cleaner to run locally.
<rdar://problem/72435662>
Created attachment 416447 [details] Patch
Created attachment 416451 [details] Patch
r=me
Committed r270944: <https://trac.webkit.org/changeset/270944> All reviewed patches have been landed. Closing bug and clearing flags on attachment 416451 [details].