def METHOD_NAME(
    decoy: Decoy,
    mock_core: TemperatureModuleCore,
    subject: TemperatureModuleContext,
) -> None:
    """It should get the module's unique serial number."""
    decoy.when(mock_core.get_serial_number()).then_return("abc-123")
    result = subject.serial_number
    assert result == "abc-123"