language: ruby dist: xenial cache: bundler matrix: include: - rvm: 2.3 - rvm: 2.4 - rvm: 2.5 - rvm: 2.6 - rvm: 2.6 env: COVERAGE=BriefSummary,Coveralls - rvm: ruby-head - rvm: truffleruby - rvm: jruby-head env: JRUBY_OPTS="--debug -X+O" allow_failures: - rvm: ruby-head - rvm: truffleruby - rvm: jruby-head