def METHOD_NAME(temp_cwd):
    """
    Test to check if r2d fails when an invalid port is specified in the port mapping
    """
    # Specifying builddir here itself to simulate passing in a run command
    # builddir passed in the function will be an argument for the run command
    args_list = ["-p", "75000:80", builddir, "ls"]
    assert not validate_arguments(builddir, args_list, "Port specification")