diff --git a/redis-with-ruby/in-and-out.rb b/redis-with-ruby/in-and-out.rb
index 950e8ec..042ae6d 100644
--- a/redis-with-ruby/in-and-out.rb
+++ b/redis-with-ruby/in-and-out.rb
@@ -19,6 +19,8 @@ def main
 
   inst = Fancy.new('yup!')
 
+  ['foo', 'derp', 'hamsters'].each { |k| redis.del(k) }
+
   puts redis.set('foo', 'bar')
   puts redis.set('derp', inst.to_yaml)
   puts redis.sadd('hamsters', 'albert')