# parallelize per feature
    CukeForker::Runner.run Dir['features/**/*.feature'],
                           :max        => 4                     # number of workers
                           :out        => "/path/to/reports",   # output path
                           :format     => :html                 # passed to `cucumber --format`,
                           :extra_args => %w[--extra arguments] # passed to cucumber,
                           :vnc        => true                  # manage a pool of VNC displays, assign one per worker.
                           
    # parallelize per scenario, with one JUnit XML file per scenario.
    CukeForker::Runner.run CukeForker::Scenarios.tagged(%W[@edition ~@wip])
                           :extra_args => %W[-f CukeForker::Formatters::JunitScenarioFormatter --out results/junit]