The simple.t failed because of an insecure $ENV{PATH} when running under -T. -T stands for "enable tainting checks". Perl goes into paranoid mode and obsessively/compulsively does run-time checking of all the paths of execution that the script could take; hence it's looking at all the paths and not getting any. You'll need to set $ENV{PATH} something like this in your script: 
$ENV{'PATH'} = '/bin:/usr/bin';

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Or in your terminal: 
export PATH=/bin:/usr/bin

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Update: corrected

In reply to Re^3: Perl module Parse::CPAN::Authors - installation fails permanent by Khen1950fx
in thread Perl module Parse::CPAN::Authors - installation fails permanent by Perlbeginner1

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