A computing device for indicating a physical layer error is described. The computing device includes a processor and instructions stored in memory that is in electronic communication with the processor. The computing device generates a command for a testing device. The command includes a directive to capture at least one physical layer signal corresponding to a communications interface between a first electronic device and a second electronic device. The computing device also obtains data representing the at least one physical layer signal. The computing device additionally stores the data in a storage device to obtain stored data. The stored data indicates any physical layer error.