if err != nil {
		t.Fatalf("Failed to gather metrics: %s", err)
	}
	for _, mf := range metrics {
		if mf.GetName() == name {
			for _, m := range mf.GetMetric() {
				h := m.GetHistogram()
				count += h.GetSampleCount()
				sum += h.GetSampleSum()
			}
			return
		}
	}
	t.Fatalf("metric not found: %v", name)
	return 0, 0

			continue // Ignore other metrics.
		}
		for _, metric := range mf.GetMetric() {
			if !testutil.LabelsMatch(metric, labelFilter) {
				continue
			}
			counterSum += int(metric.GetHistogram().GetSampleCount())
		}
	}
	if wantCount != counterSum {
		t.Errorf("Wanted count %d, got %d for metric %s with labels %#+v", wantCount, counterSum, name, labelFilter)
		for _, mf := range metrics {
			if mf.GetName() == name {