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There is the "official website" of JK Rowling, in which you can create an account and make personnality tests, like knowing in which house you are.
Here is the link : https://www.wizardingworld.com
It's with that website that I finally discovered I was in Ravenclaw ant not in Hufflepuff... But I qualify myself as a divergent (hufflepuff and ravenclaw) According to the saga, it doesn't depends of the hat, it depends of your will from the bottom of your heart...