l:            &sync.Mutex{},
				lastResponse: &kmsPluginHealthzResponse{},
			},
			wantTTL: kmsPluginHealthzNegativeTTL,
		},
	}

	for _, tt := range testCases {
		t.Run(tt.desc, func(t *testing.T) {
			_ = tt.probe.check()
			if tt.probe.ttl != tt.wantTTL {
				t.Fatalf("want ttl %v, got ttl %v", tt.wantTTL, tt.probe.ttl)
			}
		})
	}
}

	}
	w.ctx = nil
	w.done = true

	w.result <- connOrError{pc: pc, err: err, idleAt: idleAt}
	close(w.result)

	return true
}

// cancel marks w as no longer wanting a result (for example, due to cancellation).
// If a connection has been delivered already, cancel returns it with t.putOrCloseIdleConn.
func (w *wantConn) cancel(t *Transport, err error) {
	w.mu.Lock()