Third party companies that have been dragged into the U.S. Department of Justice’s fight to undo the merger of two social commerce businesses are clamoring to make sure that they don’t suffer anticompetitive effects themselves.

The fate of Bazaarvoice’s 2012 acquisition of its main rival, PowerReviews, will be decided in a bench trial before U.S. District Judge William Orrick III that begins Monday. The DOJ alleges that the merger extinguished competition in the market for online product reviews and ratings.