See also Test::Output. This provides some utility functions to do exactly this. 
use strict;
use Test::Output;

use Test::More tests => 1;
use Test_Package;

stdout_is( sub{Test_Package->testing()}, 'okay', 'Testing okay');

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In reply to Re: How to Test Output from the Standard Output by snoopy
in thread How to Test Output from the Standard Output by Anonymous Monk

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