I get you, wrong wording, it's not exactly a standard unit test, etc. But it doesn't change the meaning and intention of it - treat infrastructure as you treat code (I guess that also includes debating whether something is a 'unit' test or 'other' kind of test).
Also, having a file on a container (which is probably the easiest test to perform) often is _the desired behavior_ of a command or something else.
Also, having a file on a container (which is probably the easiest test to perform) often is _the desired behavior_ of a command or something else.