59/0 means that test #59 fails but the total number of tests is (as yet) unknown - implying that you might be using no plan.

If you declare Test::More or Test::Simple module like use Test::More qw(no_plan) and then run your test script via Test::Harness or prove, the total number of tests prints out as 0 (unknown) except at the very end. See Test::More - I love it when a plan comes together for futher information.

Best, beth