This makes no sense. If you run code in which you use a nonexistent module, for example use This::Does::Not::Exist, you'll get an error message if you've not got it installed:

#!/usr/bin/perl

use strict;
use warnings;
use This::Does::Not::Exist;
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Outputs:

Can't locate This/Does/Not/Exist.pm in @INC (@INC contains: C:/strawbe
+rry/perl/site/lib C:/strawberry/perl/vendor/lib C:/strawberry/perl/li
+b .) at fail.pl line5.
BEGIN failed--compilation aborted at fail.pl line 5.
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Clearly you would have had an error message on your VM where Win32::GuiTest was not installed.

Update: fixed typo.