},
		{
			testName: "envoy metrics tls nil",
			key:      "envoy_metrics_service_tls",
			option:   option.EnvoyMetricsServiceTLS(nil, &model.BootstrapNodeMetadata{}),
			expected: nil,
		},
		{
			testName: "envoy metrics tls",
			key:      "envoy_metrics_service_tls",
			option: option.EnvoyMetricsServiceTLS(&networkingAPI.ClientTLSSettings{
				Mode: networkingAPI.ClientTLSSettings_ISTIO_MUTUAL,

	// Add options for Envoy metrics.
	if config.EnvoyMetricsService != nil && config.EnvoyMetricsService.Address != "" {
		opts = append(opts, option.EnvoyMetricsServiceAddress(config.EnvoyMetricsService.Address),
			option.EnvoyMetricsServiceTLS(config.EnvoyMetricsService.TlsSettings, metadata),
			option.EnvoyMetricsServiceTCPKeepalive(config.EnvoyMetricsService.TcpKeepalive))
	} else if config.EnvoyMetricsServiceAddress != "" { // nolint: staticcheck