diff --git a/metrics/cloudwatch/cloudwatch_test.go b/metrics/cloudwatch/cloudwatch_test.go
index d36d9b2..025242a 100644
--- a/metrics/cloudwatch/cloudwatch_test.go
+++ b/metrics/cloudwatch/cloudwatch_test.go
@@ -79,6 +79,9 @@
 	}
 	if err := teststat.TestCounter(counter, valuef); err != nil {
 		t.Fatal(err)
+	}
+	if err := teststat.TestCounter(counter, valuef); err != nil {
+		t.Fatal("Fill and flush counter 2nd time: ", err)
 	}
 	if err := testDimensions(svc, name, label, value); err != nil {
 		t.Fatal(err)