Failing async tests at creating two accounts

gistfile1.txt

Tinytest.addAsync('test', function (test, done) {
    if (Meteor.isClient) {
        Accounts.createUser({
            username: 'user1',
            password: 'fruit'
        }, function (err) {
            Accounts.logout(function () {
                Accounts.createUser({
                    username: 'user2',
                    password: 'fruit'
                }, function (err) {if (err) console.log(err);});
            });
        });
    }

    Meteor.setTimeout(function () {
        test.isUndefined(Meteor.users.findOne({username: 'user1'}));
        test.isUndefined(Meteor.users.findOne({username: 'user2'}));
        done();
    }, 2000);
});