Can't clone ansi-test repo on Mac OS CI box
As mentioned in #265 (comment 13115), sometimes we can't clone the ansi-test repo due to some kind of bad certificate. I'm unable to duplicate this from the command-line, using the gitlab CI user on Mac OS.
There's a workaround in #265 (comment 13116) which allows us to get CI going again, but we need to figure this out and fix it permanently.