$ prove --failures --ignore-exit epicsTypesTest.t
epicsTypesTest.t .. 1/10 
not ok  1 - sizeof(epicsInt8) == 10
epicsTypesTest.t .. Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/10 subtests 

Test Summary Report
-------------------
epicsTypesTest.t (Wstat: 256 Tests: 10 Failed: 1)
  Failed test:  1
  Non-zero exit status: 1
Files=1, Tests=10,  0 wallclock secs (0.03 usr + 0.01 sys = 0.04 CPU)
Result: FAIL

##</code><code>##

             --ignore-exit     Ignore exit status from test scripts.

##</code><code>##

  "ignore_exit"
      $parser->ignore_exit(1);

    Tell the parser to ignore the exit status from the test when
    determining whether the test passed. Normally tests with non-zero
    exit status are considered to have failed even if all individual
    tests passed. In cases where it is not possible to control the
    exit value of the test script use this option to ignore it.