rvm:
  - 1.9.2
  - jruby
  - rbx-2.0
branches:
  only:
    - master
env: JRUBY_OPTS='--1.9'

rvm:
  - 1.9.2
  - jruby
  - rbx-2.0-1.9
branches:
  only:
    - master
env: JRUBY_OPTS='--1.9'

Use rbx-2.0 in 1.9 mode
Use rbx-2.0 in 1.9 mode
