"database_commonkey": lambda value, _: isinstance(value, str)
and len(value) > 1,
"log_level": lambda value, _: isinstance(value, str)
- and (value == "INFO" or value == "DEBUG"),
+ and value in ("INFO", "DEBUG"),
"auth_backend": lambda value, _: isinstance(value, str)
and (value == "internal" or value == "keystone"),
"site_url": lambda value, _: isinstance(value, str)