That is a summary, that is not the complete output, you even say Error Summary: and then quote Test Summary Report

It just says some tests failed and names the test

It doesn't say why they failed, what value was expected, what value was received

For example see http://www.cpantesters.org/distro/A/Archive-Zip.html#Archive-Zip-1.43 -> http://www.cpantesters.org/cpan/report/52b36a74-7138-1014-b404-e9901ac87222 it has stuff like

#   Failed test at t/02_main.t line 146.
#          got: 'testdir/YXtdDx7dEB/string.txt'
#     expected: 'testdir\YXtdDx7dEB/string.txt'
[download]

Which is a bug in the test itself, it shouldn't care about \ or /

Anyway, the testers have reported this to the author ... so :) its either wait for author to release update, help the author with patches, or install module and pretend no tests failed :)