The invention concerns a test method for a transmitter-receiver circuit. This transmitter-receiver circuit includes an antenna, connected to a processing unit, arranged for receiving signals and converting their frequency. The transmitter-receiver circuit also includes a power amplifier connected to said antenna and arranged for sending transmission signals. The transmitter-receiver circuit also includes a test module, characterized in that it includes the steps consisting in: a) electrically connecting the test module to the processing unit of the transmitter-receiver circuit; b) testing the operation of the transmitter-receiver circuit in a first operating mode, which can be either a data transmission mode or a data reception mode, using the test module; c) testing the operation of the transmitter-receiver circuit in a second operating mode, which can be either a data reception mode or a data transmission mode, using the test module; and d) electrically disconnecting the test module from the processing unit.