Would this ever be disrespectful to your Jiu jitsu instructor?

Once I obtain my blue belt I'd like to go to a school by someone like Matt Serra or Renzo Gracie and roll with some of their blue belts so I can see what I can learn with them as well. I don't plan on leaving the school that I go to, I'd just like to see what I can learn from a few other guys and see if I actually earned my blue belt.