  We propose to experimentally test non-deterministic time evolution in quantum
mechanics by consecutive measurements of non-commuting observables on the same
prepared state. While in the standard theory the measurement outcomes are
uncorrelated, in a super-deterministic hidden variables theory the measurements
would be correlated. We estimate that for macroscopic experiments the
correlation time is too short to have been noticed yet, but that it may be
possible with a suitably designed microscopic experiment to reach a parameter
range where one would expect a super-deterministic modification of quantum
mechanics to become relevant.
