In an example, a scan flip-flop includes a first transistor and a second transistor coupled to a data input. The scan flip-flop includes a third transistor coupled to a clock input and a fourth transistor coupled to an inverse clock input. The scan flip-flop includes a fifth transistor coupled to a scan enable input and the first transistor, and includes a sixth transistor coupled to an inverse scan enable input and the second transistor. The scan flip-flop includes an input multiplexer that includes a seventh transistor and eighth transistor coupled to the scan data input, a ninth transistor coupled to the scan enable input, and a tenth transistor coupled to the inverse scan enable input. The input multiplexer includes a first diode-connected transistor coupled between a first voltage rail and the seventh transistor, and includes a second diode-connected transistor coupled between a second voltage rail and the eighth transistor.