IIRC, they tested for a specific kind of space discretization that, if it wasn't for the SH, wouldn't be particularly easy to locate in hypothesis-space. (Actually, it wouldn't be terribly easy to locate in hypothesis-space even given the SH, if I understand this correctly.)
If it is... I hope they do not crash the system with the test.
http://www.huffingtonpost.co.uk/2012/12/12/physicists-universe-simulation-test-university-of-washington-matrix_n_2282745.html
Be sure to check out the actual reseach papers linked in the article! I would have linked to them directly, but the article is full of follow-on links of considerable interest.