We talked about the black-box aspect here.   My understanding is, depending on anything under ``/var/lib/docker/`` could change format/layout w/o notice and outside of our scope.  Meaning we'd start getting unpredictable false-failures on this test.  Do you think it's absolutely central to testing this aspect?  If so, then we can get special permission to open the box in this case.  Otherwise we should drop it.