Karma singleRun not quitting automatically - gulp

Question

My karma test runner isn't automatically quitting after tests have finished, even though my config has singleRun set to true and I'm not auto-watching files, which should make the test runner run once, then quit according to the docs.
module.exports = function(config) {
config.set({
basePath: '',
browsers: ['PhantomJS'],
frameworks: ['browserify', 'jasmine'],
files: [
{ pattern: 'test/*.js', watched: false }
],
preprocessors: {
'static/js/src/*.js': ['browserify'],
'test/*.js': ['browserify']
},
browserify: {
debug: true,
transform: [["babelify", { "presets": ["es2015"] }]]
},
colors: true,
reporters: ['progress'],
singleRun: true,
autoWatch: false
});
};
When run via my gulp test command:
gulp.task('test', function(done) {
new Karma({
configFile: __dirname + '/karma.conf.js',
singleRun: true
}, done).start();
});
the tests complete:
[09:18:38] Using gulpfile ~/static-projects/tic-tac-toe-es6/gulpfile.js
[09:18:38] Starting 'test'...
04 02 2016 09:18:40.502:INFO [framework.browserify]: bundle built
04 02 2016 09:18:40.509:INFO [karma]: Karma v0.13.19 server started at http://localhost:9876/
04 02 2016 09:18:40.523:INFO [launcher]: Starting browser PhantomJS
04 02 2016 09:18:41.157:INFO [PhantomJS 1.9.8 (Linux 0.0.0)]: Connected on socket /#xIZCPzrCyB2xljZ7AAAA with id 64233425
PhantomJS 1.9.8 (Linux 0.0.0): Executed 9 of 9 SUCCESS (0.042 secs / 0.003 secs)
[09:18:41] Finished 'test' after 3.1 s
However, I have to manually quit the test runner via Ctrl + c. What am I doing wrong?

Answer 1

I'm having this same problem. There are various threads that elude to this problem with various fixes claimed for this:
https://github.com/karma-runner/gulp-karma/issues/3
https://github.com/karma-runner/karma/issues/1035
However, as far as I can tell this is still an issue (or maybe it's resurfaced?). The only way I've found to successfully execute karma from grunt is by spawning a child process to start karma.
var spawn = require('child_process').spawn;
gulp.task('test', function(done) {
spawn('karma', ['start', __dirname + '/karma.conf.js'], { stdio : 'inherit' });
});