It seems that Simon didn't use warnings anywhere, and I am guessing that the top of your .t file might have #!/usr/bin/perl -w or similiar. You will likely need to surpress the warnings within the module itself with a no warnings right after the no strict in UNIVERSAL::AUTOLOAD (although I have not tested this myself). This will at least just disable them for the scope of UNIVERSAL::AUTOLOAD. However if you wanted to get specific, you could figure out which sub-warning this comes from and do use warnings 'something', so that you were not supressing any other valid warnings.

My guess is that those warnings maybe didn't show up in the version of perl that Simon used to write this (what was in common usage in mid. 2002?).