When trying to install Devel::Repl version 1.3.16 on Gentoo amd64 Linux, cpanminus fails during test with: t/load_core.t ..... ok Unknown error Compilation failed in require at /usr/lib64/perl5/vendor_perl/5.12.4/Term/ReadLine/Perl.pm line 63. # Tests were run but no plan was declared and done_testing() was not seen. t/load_plugins.t .. When I manually execute the testcase: $ perl -Iblib/lib t/load_plugins.t I get: ok 1 - use Devel::REPL; ok 2 - plugin B::Concise loaded Cannot create second readline interface, falling back to dumb. ok 3 - plugin Colors loaded Cannot create second readline interface, falling back to dumb. ... ok 30 - plugin Turtles loaded not ok 31 - no (unexpected) warnings (via done_testing) # Failed test 'no (unexpected) warnings (via done_testing)' # at t/load_plugins.t line 60. 1..31 # Looks like you failed 1 test of 31.