Test::Pod::Coverage fails on constant

[astroboy]

Test::Pod::Coverage fails on testing one of my packages on one server but not on another. The code it's barfing on is:

use constant UNIT_MAP => {
    s => 'seconds',
    m => 'minutes',
    h => 'hours',
    d => 'days'
};

And the error is:

not ok 8 - Pod coverage on ETL::Pipeline::File::Watch

#   Failed test 'Pod coverage on ETL::Pipeline::File::Watch'
#   at t/pod-coverage.t line 24.
# Coverage for ETL::Pipeline::File::Watch is 50.0%, with 1 naked subro
+utine:
#       UNIT_MAP

Both servers have the same versions of Pod::Coverage and Test::Pod::Coverage (0.20 and 1.08 respectively). The server where the test fail uses Perl 5.10.0. The server where it passes is on Perl 5.10.1. Any ideas why the test is failing?

[ikegami]

There has been changes to how constants are stored. They used to be stored as subs, but that's not always the case anymore.

[astroboy]

Thanks - I'll just add the constant to my ignore list.