Custom_plan.rb and zeus.json for smooth RSpec experience with Zeus.

custom_plan_zeus_rspec.rb

require 'zeus/rails'

class CustomPlan < Zeus::Rails

  def spec(argv=ARGV)
    # disable autorun in case the user left it in spec_helper.rb
    RSpec::Core::Runner.disable_autorun!
    exit RSpec::Core::Runner.run(argv)
  end
end

Zeus.plan = CustomPlan.new

zeus.json

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

  "plan": {
    "boot": {
      "default_bundle": {
        "development_environment": {
          "prerake": {"rake": []},
          "console": ["c"],
          "generate": ["g"]
        },
        "test_environment": {
          "test_helper": {"spec": ["rspec"]}
        }
      }
    }
  }
}

Read related post: http://platformonrails.wordpress.com/2013/04/06/smooth-rspec-experience-with-zeus/

I had the same problem.
Thank you to be able to solve.

However, the command, instead custom_plan, it was custom_plan_zeus_rspec.