diff --git a/.words b/.words
index c839c1f35..561453ce9 100644
--- a/.words
+++ b/.words
@@ -27,6 +27,7 @@ localhost
 mutex
 prefetching
 protobuf
+prometheus
 repin
 serializable
 teardown
diff --git a/clientv3/example_metrics_test.go b/clientv3/example_metrics_test.go
index 52d7af6ca..802a2af1f 100644
--- a/clientv3/example_metrics_test.go
+++ b/clientv3/example_metrics_test.go
@@ -46,7 +46,7 @@ func ExampleClient_metrics() {
 	// get a key so it shows up in the metrics as a range RPC
 	cli.Get(context.TODO(), "test_key")
 
-	// listen for all prometheus metrics
+	// listen for all Prometheus metrics
 	ln, err := net.Listen("tcp", ":0")
 	if err != nil {
 		log.Fatal(err)
@@ -61,7 +61,7 @@ func ExampleClient_metrics() {
 		<-donec
 	}()
 
-	// make an http request to fetch all prometheus metrics
+	// make an http request to fetch all Prometheus metrics
 	url := "http://" + ln.Addr().String() + "/metrics"
 	resp, err := http.Get(url)
 	if err != nil {
diff --git a/clientv3/integration/metrics_test.go b/clientv3/integration/metrics_test.go
index b309d5b03..cd45500ba 100644
--- a/clientv3/integration/metrics_test.go
+++ b/clientv3/integration/metrics_test.go
@@ -44,7 +44,7 @@ func TestV3ClientMetrics(t *testing.T) {
 		err  error
 	)
 
-	// listen for all prometheus metrics
+	// listen for all Prometheus metrics
 	donec := make(chan struct{})
 	go func() {
 		defer close(donec)