Time spent waiting for tests you know will pass is time wasted
I've started using 'cpanm -n Module' to install Perl modules. The '-n' tells cpanminus to skip testing and just install the module.
"What, are you insane?"
Nope, I have just found that for most Perl modules, it is more time efficient to skip testing on the initial install, and sort out any problems later. Especially with a setup you know that works.
If I was installing a new application for the first time, I would probably not skip the tests however.