Prove "Tests out of sequence" Error

Hi,

on TravisCI I see these weird "Tests out of sequence" errors with prove
and they seem to not go away. I assume the reason that they not go away
is that the ".prove" file is carried over from on build to another (but I can't 
look into this file on TravisCI).

Has anyone an idea where these errors might come from?

------------------------------------------------------------------------
t5547-push-quarantine.sh                         (Wstat: 0 Tests: 5 Failed: 0)
  Parse errors: Tests out of sequence.  Found (2) but expected (3)
                Tests out of sequence.  Found (3) but expected (4)
                Tests out of sequence.  Found (4) but expected (5)
                Bad plan.  You planned 4 tests but ran 5.
Files=760, Tests=15109, 679 wallclock secs (21.91 usr  1.78 sys + 320.79 cusr 529.13 csys = 873.61 CPU)
Result: FAIL
make[1]: *** [prove] Error 1
make: *** [test] Error 2
------------------------------------------------------------------------

Example:
https://s3.amazonaws.com/archive.travis-ci.org/jobs/169385219/log.txt

Thanks,
Lars