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zeus start
zeus test ../katello/spec/...

custom_plan.rb

require 'zeus/rails'

class CustomPlan < Zeus::Rails

  # def my_custom_command
  #  # see https://github.com/burke/zeus/blob/master/docs/ruby/modifying.md
  # end
  def test_environment
    require 'minitest/unit'
    MiniTest::Unit.class_variable_set("@@installed_at_exit", true)
    $LOAD_PATH.unshift '../katello/test'
    $LOAD_PATH.unshift '../katello/spec'
    require 'katello_test_runner'
    super
  end

end

Zeus.plan = CustomPlan.new

Gemfile.local

gem 'zeus'

zeus.json

{
  "command": "ruby -rubygems -r./custom_plan -eZeus.go",

  "plan": {
    "boot": {
      "default_bundle": {
        "development_environment": {
          "prerake": {"rake": []},
          "runner": ["r"],
          "console": ["c"],
          "server": ["s"],
          "dbconsole": []
        },
        "test_environment": {
          "test_helper": {"test": ["testrb"]}
        }
      }
    }
  }
}