N – 2 repetition costs are one of the most straightforward indications of the involvement of inhibitory processes in task switching. In the present study, we implemented a modified task switching paradigm with two kinds of cues. One type of cue consisted of a standard task cue indicating which task to perform in the upcoming trial, while in half of the trials, this cue was preceded by another cue (pre-cue) which reduced the set of candidate tasks from three to two in Experiment I, and from four to three or from four to two in Experiment II. Results revealed a significant interaction of Task Sequence and Pre-Cue: n – 2 repetition costs were visible with three candidate tasks, while they were reduced to zero if the set of candidate tasks was reduced to two. This result is interpreted in terms of an establishment of antagonistic constraints among the two remaining tasks, thereby facilitating task set activation and reducing the need for inhibition.