Dishwasher appliances configured to receive cleaning agent dispensers are provided. A dishwasher appliance includes a tub that defines a wash chamber for receipt of articles for washing, the tub comprising a plurality of sidewalls. The dishwasher appliance further includes a rack assembly arranged in the wash chamber, and a sump for collecting fluid from the wash chamber. The dishwasher appliance further includes a door movable between a closed position and an open position, the door including an inner wall further defining the wash chamber when the door is in the closed position. The dishwasher appliance further includes a dispenser mounting assembly disposed within the wash chamber, the dispenser mounting assembly configured to receive the cleaning agent dispenser.