nightwatch.json

{
  "selenium": {
    "start_process" : false,
    "server_path" : "/wd/hub",
    "log_path" : "",
    "host" : "127.0.0.1",
    "port" : 4444,
    "cli_args": {
      "webdriver.chrome.driver": "",
      "webdriver.ie.driver": "",
      "webdriver.firefox.profile" : ""
    }
  },
  "globals_path": "",
  "src_folders": ["test"],
  "output_folder": "reports",
  "test_settings": {
    "test" : {
      "selenium_host" : "127.0.0.1",
      "selenium_port" : 4445,
      "username" : "${SAUCE_USERNAME}",
      "access_key" : "${SAUCE_ACCESS_KEY}",
      "use_ssl" : false,
      "silent" : true,
      "output" : true,
      "screenshots" : {
        "enabled" : false,
        "path" : ""
      },
      "desiredCapabilities": {
        "name" : "test-example",
        "browserName": "firefox"
      },
      "selenium" : {
        "start_process" : false
      }
    }
  }
}