message: Don't blow up when browsers isn't present
diff: @@ -20,7 +20,7 @@ module.exports = function(wct, pluginOptions) {
  var eachCapabilities = [];
  wct.hook('configure', function(done) {
  - if (pluginOptions.browsers.length === 0) return done();
  + if (!pluginOptions.browsers || pluginOptions.browsers.length === 0) return done();
  _.defaults(pluginOptions, {
  username: process.env.SAUCE_USERNAME,
  