nightwatch.json

{
  "src_folders" : ["tests"],
  "output_folder" : "reports",
  "custom_commands_path" : "custom_commands",
  "custom_assertions_path" : "",
  "page_objects_path" : "",
  "globals_path" : "",

  "selenium" : {
    "start_process" : false,
    "server_path" : "",
    "log_path" : "",
    "host" : "127.0.0.1",
    "port" : 4444,
    "cli_args" : {
      "webdriver.chrome.driver" : "",
      "webdriver.ie.driver" : ""
    }
  },

  "test_workers" : {"enabled" : true, "workers" : "auto"},

  "test_settings" : {
    "default" : {
      "launch_url" : "http://localhost",
      "selenium_port"  : 80,
      "selenium_host"  : "ondemand.saucelabs.com",
      "silent": true,
      "screenshots" : {
        "enabled" : false,
        "path" : ""
      },
      "username" : "${SAUCE_USERNAME}",
      "access_key" : "${SAUCE_ACCESS_KEY}",

      "desiredCapabilities": {
        "javascriptEnabled": true,
        "acceptSslCerts": true
      }
    },

    "chrome": {
      "desiredCapabilities": {
        "platform": "linux",
        "browserName": "chrome",
        "version": "latest"
      }
    },
    "firefox": {
      "desiredCapabilities": {
        "platform": "linux",
        "browserName": "firefox",
        "version": "latest"
      }
    },
    "ie": {
      "desiredCapabilities": {
        "platform": "Windows 10",
        "browserName": "internet explorer",
        "version": "latest"
      }
    },
    "edge": {
      "desiredCapabilities": {
        "platform": "Windows 10",
        "browserName": "MicrosoftEdge",
        "version": "latest"
      }
    }    
  }
}