Also affected: KRYDE/Gtk2-Ex-NumAxis-5.tar.gz http://www.cpantesters.org/cpan/report/099ad582-4b64-11e4-b9f8-7b352c6f0924 When I install Devel::StackTrace the diagnostics show this: # Trace begun at t/MyTestHelpers.pm line 51 # MyTestHelpers::nowarnings_handler('Subroutine round redefined at /home/sand/src/perl/repoperls/installed-perls/perl/v5.21.3-257-g5716d07/127e/lib/site_perl/5.21.4/Math/Round.pm line 24.^J') called at /home/sand/src/perl/repoperls/installed-perls/perl/v5.21.3-257-g5716d07/127e/lib/site_perl/5.21.4/Math/Round.pm line 24 # require Math/Round.pm at /tmp/loop_over_bdir-26581-o4N5Tr/Gtk2-Ex-NumAxis-5-THW6oP/blib/lib/Gtk2/Ex/NumAxis.pm line 24 # Gtk2::Ex::NumAxis::BEGIN at /home/sand/src/perl/repoperls/installed-perls/perl/v5.21.3-257-g5716d07/127e/lib/site_perl/5.21.4/Math/Round.pm line 24 # eval {...} at /home/sand/src/perl/repoperls/installed-perls/perl/v5.21.3-257-g5716d07/127e/lib/site_perl/5.21.4/Math/Round.pm line 24 # require Gtk2/Ex/NumAxis.pm at t/NumAxis-buildable.t line 29 # # Exit code 1 for warnings # Looks like your test exited with 1 just after 5. -- andreas