language: ruby
cache: bundler
rvm:
  - ruby-head
  - 2.6.2
  - 2.5.5
  - 2.4.6
  - 2.3.8
os:
  - linux
before_install:
  - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
  - gem install bundler -v '< 2'
matrix:
  fast_finish: true
  allow_failures:
    - rvm: ruby-head
env:
  global:
    - TEST=true
script: bundle exec rake test