  In a recent paper [arXiv:1301.2887] Ahrens et al. claim that our "(...)
experiment on qutrits does not test Klyachko et al.'s inequality, but an
inequality with extra correlations" and that the "(...) experiment cannot be
considered a proper test of a noncontextuality inequality, since the same
observable is measured with different setups in different contexts". We
disagree with these claims. In this note we briefly re-state how our test of
the non-contextuality inequality was constructed. We explain how we keep the
context of measurements when switching between different terms of the tested
inequality, and we argue that we did in fact test the Klyachko, Can, Binicioglu
and Shumovsky inequality. In doing so, we also clarify why our experiment is
indeed a proper test of noncontextual realism.
