NightmareJS Proxy Setting Not Working

I'm trying to set a proxy for Nightmare.js but the proxy setting isn't taking. It just visits the site directly.

const Nightmare = require('nightmare');
const nightmare = new Nightmare({
    show: true,
    switches: {
        'proxy-server': 'server.proxyservice.com:8080',
        'ignore-certificate-errors': true
    }
});

async function test(url){
    try{
        const nightmare = Nightmare({show:true});
        await nightmare.authentication('proxyUsername', 'proxyPassword');
        await nightmare.cookies.clearAll();
        await nightmare.useragent("Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.111 Safari/537.36")
        const response = await nightmare.goto(url);
        await nightmare.wait('#gbqfbb',10000);
    }catch(err){
        throw new Error(err)
    }
}

test('https://www.google.com').then(console.log).catch(console.log);
nightmare.end(() => "some value");

via xendi