Can you help me understand when a quiz can be reliable but not necessarily valid?

Can you help me understand when a quiz can be reliable but not necessarily valid?

Sure! There is a quiz question where I say something similar to: I took an online quiz multiple times and kept getting the same result. 

I am asking you based on that one sentence and information to tell me what we know based on the fact that no matter how many times I took the quiz I am getting the same result.  I never mention whether or not the results were correct/accurate/describe me (it was a personality quiz). The only thing here is that I keep getting something again and again (reliable).