1. A computer-implemented method for masking dynamic regions of a user interface for determining differences in the user interface, comprising: generating a mask for a first snapshot of the user interface, wherein the mask corresponds to a set of coordinates within the first snapshot; associating the mask with a set of snapshots according to a snapshot key, wherein the set of snapshots includes the first snapshot; and applying the mask to the set of snapshots such that the area of each snapshot that corresponds to the coordinates of the mask is ignored when the first snapshot is compared with another snapshot of the set of snapshots.