t/listidentifiers.t fails in presence of wildcard DNS records

[eserte]

On some of my smokers the test suite fails like this:

#   Failed test 'Request arguments'
#   at t/listidentifiers.t line 22.
# Looks like you failed 1 test of 2.
t/listidentifiers.t ...... 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/2 subtests 

Problem is probably that the seemingly invalid hostname domain.invalid may resolve to something if wildcard DNS records are active on a system. The long story can be seen here: tokuhirom/Furl#128

Usual fix is to add a dot (.) to the invalid hostname (not tested in your case).