thanks. you've got a good point there. if the test can't load the script that I want to run tests against, I want it to crash and just doing

require 'foo';
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will do that.
but I prefer using the ok() or require_ok() with a die or croak (which I didn't include in my example) because then in a test suite I get better diagnostic:

not ok 2 - require foo;
#   at /source/t/foo.t line 30.
#     Tried to require 'foo'.
#     Error:  Can't locate foo.pm in @INC (@INC contains: /source/bin 
+... at (eval 17) line 2.
Died at /source/t/foo.t line 30.
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