$ cat exit.t
use strict;
use warnings;

use Test::More tests => 1;

is 1, 0, 'Tickety-boo';
exit 1;

##</code><code>##

$ prove --failures --ignore-exit exit.t
exit.t .. 1/1 
not ok 1 - Tickety-boo

#   Failed test 'Tickety-boo'
#   at exit.t line 6.
#          got: '1'
#     expected: '0'
# Looks like your test exited with 1 just after 1.
exit.t .. Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/1 subtests 

Test Summary Report
-------------------
exit.t (Wstat: 256 Tests: 1 Failed: 1)
  Failed test:  1
  Non-zero exit status: 1
Files=1, Tests=1,  0 wallclock secs ( 0.03 usr  0.01 sys +  0.07 cusr  0.01 csys =  0.12 CPU)
Result: FAIL