Hiya
I installed TAP::Harness::JUnit on 5.8.9 and had some class loading weirdness, thanks to a bug in base.pm. See https://rt.cpan.org/Ticket/Update.html?id=105524 for details.
Please could you either switch to "use parent", or specify a minimum version of 3.18 for base.pm?
Both solutions fix the problem
thanks