Timing for Teil 1 Goethe b2 sprechen

Hi everyone!

I'm currently preparing for the Sprechen exam which is in one month from now. One issue i keep facing is that i always end up talking over the time limit (Circa 4 Minuten). I'm trying to keep it at 4 mins but i just keep reaching 6 mins. In the real exam will i be stopped immediately if speak for more than 4 mins or is it ok to talk for 6 minutes?