"None"

WWW::Mechanize for a long time did tests against live sites, which was a source of constant problems as the reachability of those sites was spotty or the content changed. Hence, a CPAN module should never use outside contact for its test suite, except when that outside contact is the main reason for the module. For example, Finance::Bank::Postbank_DE does tests against the live (demo) website it is automating, because that is its only reason of existence.

Update: Fixed module name, spotted by LanX, thanks!