How to login intro the Wordpress admin?

I am trying to login in to my Wordpress site but seems like the login cannot be successful.

describe('Wordpress Login', function() {
    const browser = new Browser();
    before(function() {
        return browser.visit(baseUrl+'wp-login.php');
    });

    describe('Submit form', function() {
        before(function() {
            browser.fill('#user_login', 'my_username').fill('#user_pass', 'my_password');
            return browser.pressButton('#wp-submit');
        });

        it('Should be successful', function() {
            console.log(browser.text('title')); // My Wordpress ‹ Log In
            //browser.assert.success();
        });
    });
});

When I do log by browser.text('title')

its return My Wordpress ‹ Log In not Dashboard ‹ My Wordpress

That means it doesn't succeed. I try to use wait(), then(),setTimeout()` before checking so its error like :

Error: timeout of 10000ms exceeded. Ensure the done() callback is being called in this test.

Any idea ?