I was at a party of a friend of mine, I was dancing and then I decided to go outside a little bit to catch some air, and then there was this girl outside, she was pretty and I'd say a 7 and I sat right next to her. We spent like 2 minutes without exchanging a word and then I decide to initiate a small talk and place some jokes, the convo starts getting interesting, and then this is where she decides to drop the "Are you always that serious " question. Then I asked her why does she think I'm serious, and then she starts saying that all times she saw me I was calm and not so talkative because again it was not the first time I met the girl, it was like the 3rd time but it was that day that we did first talk openly to each other.

So my question is this a shit test when a girl says that I'm a serious guy? If it is, how would you do to avoid falling it?