testem.json

{
  "on_start": {
    "command": "browserstack tunnel localhost:<port>",
    "wait_for_text": "You can now access your local server(s) in our remote browser"
  },

  "test_page": "spec/SpecRunner.html",

  "launchers": {
    "bs_ie_10": {
      "command": "browserstack launch --attach ie:10.0 <url>",
      "protocol": "browser"
    },
    "bs_ie_9": {
      "command": "browserstack launch --attach ie:9.0 <url>",
      "protocol": "browser"
    },
    "bs_ie_8": {
      "command": "browserstack launch --attach ie:8.0 <url>",
      "protocol": "browser"
    },
    "bs_ie_7": {
      "command": "browserstack launch --attach ie:7.0 <url>",
      "protocol": "browser"
    },
    "bs_ie_6": {
      "command": "browserstack launch --attach ie:6.0 <url>",
      "protocol": "browser"
    }
  },

  "launch_in_dev": ["Chrome", "Safari", "Firefox", "PhantomJS", "bs_ie_7", "bs_ie_8", "bs_ie_9", "bs_ie_10"]
}