diff --git a/internal/cmd/oohelperd/handler.go b/internal/cmd/oohelperd/handler.go
index 4b3d343..4129210 100644
--- a/internal/cmd/oohelperd/handler.go
+++ b/internal/cmd/oohelperd/handler.go
@@ -74,7 +74,7 @@ func (h *handler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	elapsed := time.Since(started)
 	metricWCTaskDurationSeconds.Observe(float64(elapsed.Seconds()))
 	if err != nil {
-		metricRequestsCount.WithLabelValues("400", "measurement_failed").Inc()
+		metricRequestsCount.WithLabelValues("400", "wctask_failed").Inc()
 		w.WriteHeader(400)
 		return
 	}
diff --git a/internal/cmd/oohelperd/metrics.go b/internal/cmd/oohelperd/metrics.go
index 73325ce..f8468b2 100644
--- a/internal/cmd/oohelperd/metrics.go
+++ b/internal/cmd/oohelperd/metrics.go
@@ -27,7 +27,7 @@ var (
 	// metricWCTaskDurationSeconds summarizes the duration of the web connectivity measurement task.
 	metricWCTaskDurationSeconds = promauto.NewSummary(prometheus.SummaryOpts{
 		Name: "oohelperd_wctask_duration_seconds",
-		Help: "Summarizes the time to perform a test-helper measurement (in seconds)",
+		Help: "Summarizes the time to complete the Web Connectivity measurement task (in seconds)",
 		// See https://grafana.com/blog/2022/03/01/how-summary-metrics-work-in-prometheus/
 		//
 		// TODO(bassosimone,FedericoCeratto): investigate whether using