language: ruby
rvm:
  - 2.1.0
script:
  - bundle exec rspec
services:
  - redis-server

language: ruby
rvm:
  - 2.1.0
  - 2.4.0
script:
  - bundle exec rspec
services:
  - redis-server

Test using up-to-date Ruby 2.4 as well
Travis: Test using up-to-date Ruby 2.4 as well
