Driving licence Kl.3 (pink) extend to unrestricted CE

Hello, I would like to purchase the FS class CE for heavy vehicles. I have the old FS class 3 (since 1994). This would cover the new classes C1, C1E and by application also CE(79). For the extension to unrestricted CE I need corresponding theoretical blocks and a theory test, training rides and mandatory drives, so far it is clear to me. What is not clear if I also have to take a driving test. Is the driving test by the practically for C1E carried out driving test (di e yes for Kl.3 only took place by car) for this purpose valid or I must prove to an examiner my driving skills on heavy vehicle. Greeting Daniel