Seems like customContextFile, customClientContextFile options doesn't work

[sverdlov]

I've tried provide custom files, but no success. I copied client.html to my project root and provided config like that

module.exports = function (config) {
    config.set({
        ...
        customClientContextFile: 'client.html'
    });
};

but it get's file from lib. I tried to do some debug, logs in config.js before return shows it gets path correct initialy https://github.com/karma-runner/karma/blob/50f963551fbccf669c8d42499d0406ded2ec6176/lib/config.js#L269

but then here it uses lib default file https://github.com/karma-runner/karma/blob/50f963551fbccf669c8d42499d0406ded2ec6176/lib/middleware/karma.js#L75 Maybe I did something wrong?