$ prove -v hexdig3.t 
hexdig3.t .. 
Filename: /tmp/zgeqEkMDL8
Filename: /tmp/TrjkWZFjs2
$VAR1 = [
          'e395fd01f84d7d1006a99e2a6b8fb832',
          '24676db37df646bab175feedec39259d'
        ];
not ok 1 - Same md5_hex for /tmp/zgeqEkMDL8 and /tmp/TrjkWZFjs2

#   Failed test 'Same md5_hex for /tmp/zgeqEkMDL8 and /tmp/TrjkWZFjs2'
#   at hexdig3.t line 25.
#          got: 'e395fd01f84d7d1006a99e2a6b8fb832'
#     expected: '24676db37df646bab175feedec39259d'
not ok 2 - compare() indicates no differences between /tmp/zgeqEkMDL8 and /tmp/TrjkWZFjs2

#   Failed test 'compare() indicates no differences between /tmp/zgeqEkMDL8 and /tmp/TrjkWZFjs2'
#   at hexdig3.t line 28.
#          got: '1'
#     expected: '0'
1..2
# Looks like you failed 2 tests of 2.
Dubious, test returned 2 (wstat 512, 0x200)
Failed 2/2 subtests 

Test Summary Report
-------------------
hexdig3.t (Wstat: 512 Tests: 2 Failed: 2)
  Failed tests:  1-2
  Non-zero exit status: 2