The Connecticut Supreme Court has affirmed a lower court ruling that restaurant delivery drivers can’t be paid below minimum wage just because they receive tips.

The 7-0 April 4 decision by the state’s high court is a blow for Amaral Brothers Inc., which filed a petition with the state Labor Department in 2013 seeking a determination that it could pay its approximately 40 delivery drivers below the minimum wage, which is now $10.10 an hour. Amaral Brothers operates Domino’s pizza franchises in Groton and Mystic.