Health check priority

i’v used new features about active health check and passive health check.
My question is :i configure active check on a api, then i use passive check through /upstream/targets/10.1.2.3:1234/unhealthy 。but i found it not work. The request still jumps to the unhealthy target which i manual configured.when i configure passive and active on one api, active check‘s priority is better then passive check.
How could I down a target no matter whether he is really healthy or not?