diff --git a/internal/testdata/metric.go b/internal/testdata/metric.go
index df3cddd2ddd..553b50c22cd 100644
--- a/internal/testdata/metric.go
+++ b/internal/testdata/metric.go
@@ -173,6 +173,9 @@ func GeneratMetricsAllTypesWithSampleDatapoints() pdata.Metrics {
 }
 
 func initCounterIntMetric(im pdata.Metric) {
+	// TODO: this is currently setting a float value, once
+	// Sum supports setting either Int or Double, ensure this test
+	// is updated to set an Int value.
 	initMetric(im, TestCounterIntMetricName, pdata.MetricDataTypeSum)
 
 	idps := im.Sum().DataPoints()