Abstract: A well testing apparatus includes a separator, a well control assembly upstream of the separator, and a fluid management assembly downstream of the separator. At least one of the well control assembly or the fluid management assembly can include flow control equipment, a controller for controlling actuation of the flow control equipment, and a human-machine interface that enables an operator to monitor or control operation of the well control assembly or the fluid management assembly. The human-machine interface can be positioned with the flow control equipment so as to enable an operator to directly sense contextual clues about operation of the well control assembly or the fluid management assembly independent of the human-machine interface while using the human-machine interface. Additional systems, methods, and devices are also disclosed.