Nightwatch.js how to use the wait API to check page title

Question

I am trying to only use the expect nightwatch.js API to check the html page title, but I cannot get the correct command.
My assumption would be to either check the inner text of the title element, or maybe its value, but it does not work as I expected.

If I run the following mocha test:

describe('Open Google', function () {
    var expectedTitle = 'Google';
    var uri = 'https://www.google.de';

    it('should assert the page title', function (browser) {
        browser.url(uri);
        browser.expect.element('title').to.be.present.before(2000);
        browser.assert.title(expectedTitle);
    });

    it('should verify title.text', function (browser) {
        browser.url(uri);
        browser.expect.element('title').to.be.present.before(2000);
        browser.expect.element('title').text.to.equal(expectedTitle);
    });

    it('should verify title.value', function (browser) {
        browser.url(uri);
        browser.expect.element('title').to.be.present.before(2000);
        browser.expect.element('title').value.to.equal(expectedTitle);
    });
});

The assert statement works as expected, but with both ways to use expect, I don't get the page title.

Conclusion:

Open Google
√ should assert the page title (4787ms)
1) should verify title.text
2) should verify title.value


1 passing (12s)
2 failing

1) Open Google should verify title.text:
    Expected element <title> text to equal: "Google" - Expected "equal 'Google'" but got: ""
    at Context.<anonymous> (C:\temp\nightwatch-test\test\google.js:14:18)

2) Open Google should title.value:
    Expected element <title> to have value equal: "Google" - Expected "equal 'Google'" but got: "null"
    at Context.<anonymous> (C:\temp\nightwatch-test\test\google.js:20:18)