'use strict';

var path = require('path');
var gulp = require('gulp');

var karma = require('karma');

function runTests(singleRun, done) {
  var server = new karma.Server({
    configFile: path.join(__dirname, '/../karma.conf.js'),
    singleRun: singleRun,
    autoWatch: !singleRun
  }, function(failCount) {
    done(failCount ? new Error('Failed ' + failCount + ' tests.') : null);
  });
  server.start();
}

gulp.task('test', ['scripts:test'], function(done) {
  runTests(true, done);
});

gulp.task('test:auto', ['scripts:test-watch'], function(done) {
  runTests(false, done);
});

'use strict';

var path = require('path');
var gulp = require('gulp');

var karma = require('karma');

function runTests(singleRun, done) {
  karma.server.start({
    configFile: path.join(__dirname, '/../karma.conf.js'),
    singleRun: singleRun,
    autoWatch: !singleRun
  }, function(failCount) {
    done(failCount ? new Error('Failed ' + failCount + ' tests.') : null);
  });
}

gulp.task('test', ['scripts:test'], function(done) {
  runTests(true, done);
});

gulp.task('test:auto', ['scripts:test-watch'], function(done) {
  runTests(false, done);
});

--- 
+++ 
@@ -6,14 +6,13 @@
 var karma = require('karma');
 
 function runTests(singleRun, done) {
-  var server = new karma.Server({
+  karma.server.start({
     configFile: path.join(__dirname, '/../karma.conf.js'),
     singleRun: singleRun,
     autoWatch: !singleRun
   }, function(failCount) {
     done(failCount ? new Error('Failed ' + failCount + ' tests.') : null);
   });
-  server.start();
 }
 
 gulp.task('test', ['scripts:test'], function(done) {
Use karma.Server instead of karma.server
