Rails + Redis subscribe returns an error

Rails + Redis subscribe returns an error

Rails 4 + Redis 3.0.4
When I trying to subscribe to channel with Redis:
$ rails c
irb(main):001:0> redis = Redis.new
=> #<Redis client v3.0.2 for redis://127.0.0.1:6379/0>
irb(main):002:0> redis.subscribe('test-channel')
It throws an error:
LocalJumpError: no block given (yield)
from
.rvm/gems/ruby-1.9.3-p392/gems/redis-3.0.4/lib/redis/subscribe.rb:52:in
`initialize'
from
.rvm/gems/ruby-1.9.3-p392/gems/redis-3.0.4/lib/redis/subscribe.rb:30:in
`new'
from
.rvm/gems/ruby-1.9.3-p392/gems/redis-3.0.4/lib/redis/subscribe.rb:30:in
`subscription'
from
.rvm/gems/ruby-1.9.3-p392/gems/redis-3.0.4/lib/redis/subscribe.rb:12:in
`subscribe'
from .rvm/gems/ruby-1.9.3-p392/gems/redis-3.0.4/lib/redis.rb:2221:in
`_subscription'
from .rvm/gems/ruby-1.9.3-p392/gems/redis-3.0.4/lib/redis.rb:1883:in
`block in subscribe'
from .rvm/gems/ruby-1.9.3-p392/gems/redis-3.0.4/lib/redis.rb:36:in `block
in synchronize'
from .rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/monitor.rb:211:in
`mon_synchronize'
from .rvm/gems/ruby-1.9.3-p392/gems/redis-3.0.4/lib/redis.rb:36:in
`synchronize'
from .rvm/gems/ruby-1.9.3-p392/gems/redis-3.0.4/lib/redis.rb:1882:in
`subscribe'
from (irb):2
from
.rvm/gems/ruby-1.9.3-p392/gems/railties-4.0.0/lib/rails/commands/console.rb:90:in
`start'
from
.rvm/gems/ruby-1.9.3-p392/gems/railties-4.0.0/lib/rails/commands/console.rb:9:in
`start'
from
.rvm/gems/ruby-1.9.3-p392/gems/railties-4.0.0/lib/rails/commands.rb:64:in
`<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
What i'm doing wrong?