$ cd prime_scripts/ #### $ prove -l t/prime_test_1.t t/prime_test_1.t .. ok All tests successful. Files=1, Tests=1000, 0 wallclock secs ( 0.06 usr 0.01 sys + 0.14 cusr 0.01 csys = 0.22 CPU) Result: PASS $ #### use strict; use warnings; use 5.10.1; use Math::Prime::Util qw (is_prime); use Test::More; use FindBin::libs; use LousyPrime qw(is_lousy_prime); for (1..1000) { say is_prime($_), is_lousy_prime($_); is ( is_prime($_) , is_lousy_prime($_), "matches"); } done_testing;