CPAN Testing is an effort to set up a Quality Assurance (QA) team for CPAN modules, comprised of a globally diverse group of individuals, maintained a diverse collection of operating environments. This talk aims to illustrate the processes and mechanisms associated with CPAN smoke testing, as experienced by a veteran CPAN Tester, including the following topics: - What is CPAN Testing? - The tools of CPAN Testing - How do we know what modules to test? - The problems and dangers of CPAN Testing - Scaled up CPAN Testing - Future developments A CPAN Testers BOF is planned to provide a longer discussion time for testers.