Appium Lib v9+ with Test Object

driver.rb

require "appium_lib"

def desired_capabilities
  {
    caps: { 
      # Required: Must be present to authenticate
      "testobject_api_key": 'SOMETHING',

      platformName: 'Android',
      deviceName: 'LG Nexus 5X',
      phoneOnly: 'false',
      tabletOnly: 'false',
      privateDevicesOnly: 'false'
    },

    appium_lib: {
      # Required: Either the US or the European DC
      server_url: "https://us1.appium.testobject.com/wd/hub"
    }
  }
end

begin
  @driver = Appium::Driver.new(desired_capabilities)
  @driver.start_driver
ensure
  @driver.driver_quit
end