An electronic device includes a housing, a communication circuit positioned inside the housing, and including a first port for a first frequency band and a second port for a second frequency band, a first antenna positioned inside the housing or forming a part of the housing, a second antenna positioned inside the housing or forming a part of the housing, a test port positioned inside the housing or at least partially exposed through the housing, and a switching circuit configured to selectively connect one or more of the first port or the second port to one or more of the first antenna, the second antenna, or the test port.