The "die_if_not_set" test has the LINENO as a positional argument.
The existing tests are not passing this in, so they are failing.
Along with this, remove the "-x" from the invocation and hide the
output of the tests that are expected to fail to avoid confusion.
Change-Id: Ibf6b9d7bb72b9f92831e1a90292ff8b0bec7faea