>>13070228I did reverse image search. Is this the test?
https://openpsychometrics.org/tests/FSIQ/results.php?data=SWM4lI1803yZThat one has at least the results encoded in the URL so you can't just change the number on screen. If you look for the parameter in the URL, you can check if the link isn't copied from anywhere, so that's probably a bit more robust against cheating.