I'd probably move this into helper.rb. I know its only used in one place atm though.

Also its not a big deal, but I'd also invert the logic - ie. 'sqlite_is_installed_on?' as that would seem less 'surprising' to me I guess if you view this method on its own merits (as opposed to how its used). The test itself can invert the logic later on - (ie. unless sqlite_is_installed_on?).