$ cat exit.t
use strict;
use warnings;

use Test::More tests => 1;

is 1, 1, 'Tickety-boo';
exit 1;
$ prove --failures --ignore-exit exit.t 
exit.t .. 1/1 # Looks like your test exited with 1 just after 1.
exit.t .. ok   
All tests successful.
Files=1, Tests=1,  0 wallclock secs ( 0.02 usr  0.00 sys +  0.02 cusr  0.00 csys =  0.04 CPU)
Result: PASS
$