Error: task completion callback called too many times

[DaveStein]

Not sure if this is related to #41 but if I do the following, the gulp task hangs as if waiting on something async:

gulp.task('default', ['selenium'], function(done) {
  return gulp.src('wdio.conf.js').pipe(webdriver());
});

If I try doing the following, it errors with Error: task completion callback called too many times

gulp.task('default', ['selenium'], function(done) {
  return gulp.src('wdio.conf.js').pipe(webdriver())
  .on('end', function() {
    done();
  });
});

[DaveStein]

btw doing process.exit() works within end but that seems wrong

[DaveStein]

Er realized that selenium was still running and needed to do selenium.process.kill();