Don't call it Test ...
"Test" ... collides with the Test module ...

Also be aware that in a "case preserving but case insensitive" file system like that used in Windose (gotta love the 'Dose), the possibilities for collision are increased. (I don't know how this works on *nix-ish systems.) I found this out the hard way when I tried to define a Base.pm module to play around with DNA base pairs and discovered, after much puzzlement, that it collided with the base pragma!