diff --git a/plugins/outputs/kinesis/kinesis_test.go b/plugins/outputs/kinesis/kinesis_test.go
index b398d7e8a..6b1860abc 100644
--- a/plugins/outputs/kinesis/kinesis_test.go
+++ b/plugins/outputs/kinesis/kinesis_test.go
@@ -25,6 +25,19 @@ func TestFormatMetric(t *testing.T) {
 	}
 	require.NoError(t, err)
 
+	k := &KinesisOutput{
+		Format: "json",
+	}
+
+	valid_json := "{\"fields\":{\"value\":1},\"name\":\"docker\",\"tags\":{\"tag1\":\"value1\"},\"timestamp\":1257894000}"
+	func_json, err := FormatMetric(k, p)
+
+	if func_json != valid_json {
+		t.Error("Expected ", valid_json)
+		t.Error("Found ", func_json)
+	}
+	require.NoError(t, err)
+
 	k = &KinesisOutput{
 		Format: "custom",
 	}