campfire_test stacktrace

[root@testing-sensu01 ~]#  /opt/sensu/embedded/bin/ruby campfire_test.rb
/opt/sensu/embedded/lib/ruby/2.0.0/net/http.rb:917:in `connect': SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (Faraday::Error::ConnectionFailed)
        from /opt/sensu/embedded/lib/ruby/2.0.0/net/http.rb:917:in `block in connect'
	from /opt/sensu/embedded/lib/ruby/2.0.0/timeout.rb:51:in `timeout'
	from /opt/sensu/embedded/lib/ruby/2.0.0/net/http.rb:917:in `connect'
	from /opt/sensu/embedded/lib/ruby/2.0.0/net/http.rb:861:in `do_start'
	from /opt/sensu/embedded/lib/ruby/2.0.0/net/http.rb:850:in `start'
	from /opt/sensu/embedded/lib/ruby/2.0.0/net/http.rb:1366:in `request'
	from /opt/sensu/embedded/lib/ruby/2.0.0/net/http.rb:1125:in `get'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/faraday-0.8.7/lib/faraday/adapter/net_http.rb:73:in `perform_request'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/faraday-0.8.7/lib/faraday/adapter/net_http.rb:38:in `call'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/faraday-0.8.7/lib/faraday/response.rb:8:in `call'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/faraday-0.8.7/lib/faraday/response.rb:8:in `call'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/faraday_middleware-0.9.0/lib/faraday_middleware/response_middleware.rb:30:in `call'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/faraday-0.8.7/lib/faraday/response.rb:8:in `call'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/faraday_middleware-0.9.0/lib/faraday_middleware/request/encode_json.rb:23:in `call'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/faraday-0.8.7/lib/faraday/connection.rb:247:in `run_request'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/faraday-0.8.7/lib/faraday/connection.rb:100:in `get'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/tinder-1.9.1/lib/tinder/connection.rb:76:in `get'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/tinder-1.9.1/lib/tinder/campfire.rb:34:in `rooms'
	from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/tinder-1.9.1/lib/tinder/campfire.rb:48:in `find_room_by_name'
	from campfire_test.rb:7:in `<main>'

campfire_test.rb

[root@testing-sensu01 ~]# cat campfire_test.rb
ENV['SSL_CERT_FILE'] = '/etc/ssl/certs/ca-certificates.crt'
require 'tinder'

token = 'xxxxx' 
campfire = Tinder::Campfire.new 'xxxx', :ssl => true, :ssl_verify => true, :token => token

room = campfire.find_room_by_name("Prod Alerts")
room.speak 'Moppy test from testing-sensu01'

exit(0)