diff --git a/appmetrics/emitter/prometheus/collector_test.go b/appmetrics/emitter/prometheus/collector_test.go
index 4045e3d7..f0a4ed3a 100644
--- a/appmetrics/emitter/prometheus/collector_test.go
+++ b/appmetrics/emitter/prometheus/collector_test.go
@@ -155,11 +155,13 @@ histogram_min 8
 		r := metrics.NewRegistry()
 		c := NewCollector(r, WithTimerQuantiles([]float64{0.5, 0.9, 0.95, 0.99}))
 
-		timer := metrics.NewRegisteredTimer("timer", r)
+		timer := metrics.NewCustomTimer(metrics.NewHistogram(metrics.NewUniformSample(64)), metrics.NewMeter())
 		for _, i := range []int64{10, 9, 15, 12, 20, 28, 8, 12, 20, 16, 17, 27, 11, 10, 20, 21, 19, 18, 10, 26} {
 			timer.Update(time.Duration(i) * time.Millisecond)
 		}
 
+		_ = r.Register("timer", timer)
+
 		expected := `
 # HELP timer_max_seconds metrics.Timer
 # TYPE timer_max_seconds untyped