gating

A gate is a check that blocks. Its only job is to go red when it should.

The characteristic failure is not a wrong check — a wrong check gets noticed. It is a check that cannot fail, which reports PASS forever and is indistinguishable from a working one from the outside. That is what makes this different from ordinary testing: the object under suspicion is the check.

When NOT to use this skill

Scope is ONE check and whether it can be made to fail.