if err != nil {
			return true, nil, fmt.Errorf("failed to convert label selector specified in test client")
		}
		assert.Equal(t, selector, listAction.GetListRestrictions().Labels, "the metric selector should have matched the one specified")

		metrics := emapi.ExternalMetricValueList{}

		for _, level := range tc.metric.levels {
			metric := emapi.ExternalMetricValue{