Gulp karma "spawn ENAMETOOLONG" when processing many files - phantomjs

Question

We're using gulp-karma plugin to gulp for our testing and PhantomJS. We're running on Windows and PhantomJS is a .exe file. Our files that has the tests has grown and now we're getting the error "spawn ENAMETOOLONG". From what I've gather from this answer: https://github.com/dbushell/grunt-svg2png/issues/17 for Grunt is that the problem is the parameters sendt to PhantomJS is too large. Have anyone had simlar problems or know any work arounds for it (except having to merge test files into fewer files)?
Error message:
[14:20:19] Starting Karma server...
events.js:72
throw er; // Unhandled 'error' event
^
Error: spawn ENAMETOOLONG
at errnoException (child_process.js:1001:11)
at Process.ChildProcess._handle.onexit (child_process.js:792:34)

Answer 1

Give files list into karma config instead of gulp.src()
Example
var files =[
'lib/**/*.js',
'src/**/*.js',
'test/**/*.js'
],
gulp.task('unit.test', function() {
return gulp.src([])
.pipe(karma({
configFile: 'my.karma.conf.js',
files : files,
action: 'run'
}))
.on('error', function(err) {
throw err;
});
});