| Subject: | Undeclared dependency on UNIVERSAL::ref |
As per subject. Sample fail report: http://www.cpantesters.org/cpan/report/102194020 (version 0.66)
Coming from line: https://metacpan.org/source/STEVENL/Test-Mocha-0.66/lib/Test/Mocha/Mock.pm#L12
Line itself: use if $] lt '5.025', 'UNIVERSAL::ref';
So it is only a dependency on perl 5.24 and lower-than, but it needs to be declared nonetheless.
Note (drive-by-diagnostics): comparing version numbers with 'lt' operator is only correct for a very limited class of comparisons.