r := NewJwksResolver(JwtPubKeyEvictionDuration, JwtPubKeyRefreshInterval, JwtPubKeyRefreshIntervalOnFailure, testRetryInterval)
	defer r.Close()
	serverDelay := 100 * time.Millisecond
	ms, err := test.StartNewServerWithHandlerDelay(serverDelay)
	defer ms.Stop()
	if err != nil {
		t.Fatal("failed to start a mock server")
	}

	mockCertURL := ms.URL + "/oauth2/v3/certs"

	cases := []struct {