def METHOD_NAME(self):
    '''
        Test the is_mbi_format_synthetic(mbi) function.
    '''
    # Test synthetic
    mbi = "4S10A00AA00"
    self.assertTrue(is_mbi_format_synthetic(mbi))
    # Test real
    mbi = "4T10A00AA00"
    self.assertFalse(is_mbi_format_synthetic(mbi))