19.6. Testing on Multiple Platforms
The CPAN Testers (http://testers.cpan.org) automatically test almost all modules uploaded to CPAN. Volunteers around the world automatically download and test each distribution on whatever setup they have. Among them, they test your module on just about every platform, operating system, and Perl version that matters (and many that you probably don't pay attention to). They send email to the module authors telling them what happened, and they automatically update the Testers database. You can look at the results for any module through the Testers web site or on CPAN Search (http://search.cpan.org).
Often, testers can help you figure out problems for platforms to which you do not have access.