In an answer to a previous question, What exactly are Quantum XOR Games?, ahelwer states:
One application of xor games is self-testing: when running algorithms on an untrusted quantum computer, you can use xor games to verify that the computer isn't corrupted by an adversary trying to steal your secrets!
In an answer to a different previous question, How to benchmark a quantum computer? (which includes a link to Using a simple puzzle game to benchmark quantum computers by James Wootton), DaftWullie suggests blind quantum computation as a general strategy.
How can XOR games be used to perform blind quantum computations to benchmark quantum computers?