The issue here is we start some short `sleep`s in the background, wait
for a prompt, and only *then* wait for jobs, and *then* check for the
job end output.
That means if the prompt takes too long, we'll read the job end
messages with the `expect_prompt`.
Instead of increasing the timeouts, just wait on the same line and
remove that prompt.
Github Action's macOS builds are even more resource-starved (even tho
they use the same provider?) than
Travis, but Travis is unusable to us now, so....
