symfony2 LDAP Logout Action

Question

After a few hours I got a working LDAP-Login, based on the 'new' symfony2 ldap component from November 11, 2015 (see here). Also I followed the docs about the log out. But everytime I request on that logout function, nothing seems to happen. The user is still logged in.

This is my code:

app/config/security.yml

security:
    firewalls:
        main:
            pattern:   ^/
            stateless: true
            http_basic_ldap:
                service: service.key
                dn_string: "{username}@example.tld"
            logout:
            path: /logout

Bundle/Resources/config/routing.yml

vendor_bundlename_logout:
    path: /logout

Depending on this answere my question is: Do I have to manage the logout by myself with incorret login credentials? Or did I missconfigured the logout aspect in the security.yml?