@kbaum, this was still using the older `ENV["PGBACKUPS_DATABASE"]`, instead of `ENV["PGBACKUPS_DATABASE_URL"]`.  Under RSpec this passed since the file is read top to bottom.  Under MiniTest it failed because the order of tests is randomized and the subsequent example was running first, setting `ENV["PGBACKUPS_DATABASE_URL"]` to something, so then this example was then run it would fail.