metrics := &cmapi.MetricValueList{}
		assert.NotNil(t, tc.metric.singleObject, "should have only requested a single-object metric when calling GetObjectMetricReplicas")
		gk := schema.FromAPIVersionAndKind(tc.metric.singleObject.APIVersion, tc.metric.singleObject.Kind).GroupKind()
		mapping, err := mapper.RESTMapping(gk)
		if err != nil {
			return true, nil, fmt.Errorf("unable to get mapping for %s: %v", gk.String(), err)