rvm:
#  - 1.8.6  # travis no longer supports this https://twitter.com/#!/travisci/status/114926454122364928
  - 1.8.7
#  - 1.9.1  # travis no longer supports this https://twitter.com/#!/travisci/status/114926454122364928
  - 1.9.2
  - 1.9.3
  - rbx
  - rbx-2.0
  - ree
  - ruby-head