@croaky removed the `before` block on the home page test and added a spec for `home_page = nil`. 

I also added `random` to suite which uncovered some failing specs around caching. Turns out the cache wasn't being cleared between runs.

https://github.com/thoughtbot/high_voltage/commit/c6cc078f09cf1769a3e9878d11ecd0a90bc43f4d