wct.conf.json

{
  "verbose": false,
  "plugins": {
    "local": {
      "disabled": true,
      "browsers": ["chrome", "firefox"]
    },
    "sauce": {
      "disabled": true,
      "browsers": [
        {
          "browserName": "chrome",
          "version": "latest",
          "platform": "OS X 10.12"
        },
        {
          "browserName": "chrome",
          "version": "45",
          "platform": "OS X 10.10"
        },
        {
          "browserName": "firefox",
          "version": "latest",
          "platform": "OS X 10.11"
        },
        {
          "browserName": "firefox",
          "version": "50",
          "platform": "OS X 10.11"
        },
        {
          "browserName": "microsoftedge",
          "version": "latest",
          "platform": "Windows 10"
        },
        {
          "browserName": "microsoftedge",
          "version": "13",
          "platform": "Windows 10"
        },
        {
          "browserName": "safari",
          "version": "latest",
          "platform": "OS X 10.12"
        },
        {
          "browserName": "safari",
          "version": "9",
          "platform": "OS X 10.11"
        }
      ]
    }
  }
}