Apparatuses and methods for comparing a sense current representative of a number of failing memory cells of a group of memory cells and a reference current representative of a reference number of failing memory cells is provided. One such apparatus includes a comparator configured to receive the sense current and to receive the reference current. The comparator includes a sense current buffer configured to buffer the sense current and the comparator is further configured to provide an output signal having a logic level indicative of a result of the comparison.