Fix rspec failure
Fix rspec failure

https://github.com/josiahcarlson/redis-in-action/pull/37#discussion_r143381706

josiahcarlson/redis-in-action,josiahcarlson/redis-in-action,josiahcarlson/redis-in-action,josiahcarlson/redis-in-action,josiahcarlson/redis-in-action,josiahcarlson/redis-in-action