libtap-parser-perl | transitional dummy package | Mehr ...
This package is used to pull in libtest-harness-perl, which takes over the functionality of libtap-parser-perl. You can safely remove it after libtest-harness-perl is installed.
libtest-harness-perl | module to run standard Perl test scripts with statistics | Mehr ...
Test::Harness is a Perl module usually invoked by Perl's test systems, namely Test::Simple, Test::More and those based on Test::Builder. Since this module is part of Perl's core distribution, it is generally not necessary except in special cases; for details, see Bug #383517.