For the cc-pVDZ-F12 orbital set, sufficient accuracy in the density fitting can be attained with cc-pV(D+d)Z+1g/JKFit. However, this auxiliary basis is larger than cc-pVTZ/JKFit and produces slightly larger errors, thus it does not represent a logical choice. In the majority of cases, augmenting the auxiliary sets with diffuse functions leads to only minor improvements and is difficult to recommend, although we do note that none of the molecules in the test set is likely to have diffuse electronic distributions. For the cc-pVTZ-F12 orbital set, the smallest auxiliary basis to reach the two orders of magnitude threshold is cc-pV(Q+d)Z/JKFit and, as the orbital basis uses the s and p primitives from cc-pVQZ, there is some underlying justification for this choice.