diff --git a/cmd/nginx/main.go b/cmd/nginx/main.go
index 0018b435e..58efb26c7 100644
--- a/cmd/nginx/main.go
+++ b/cmd/nginx/main.go
@@ -121,7 +121,10 @@ func main() {
 	reg := prometheus.NewRegistry()
 
 	reg.MustRegister(prometheus.NewGoCollector())
-	reg.MustRegister(prometheus.NewProcessCollector(os.Getpid(), ""))
+	reg.MustRegister(prometheus.NewProcessCollector(prometheus.ProcessCollectorOpts{
+		PidFn:        func() (int, error) { return os.Getpid(), nil },
+		ReportErrors: true,
+	}))
 
 	mc, err := metric.NewCollector(conf.ListenPorts.Status, reg)
 	if err != nil {
diff --git a/internal/ingress/metric/collectors/testutils.go b/internal/ingress/metric/collectors/testutils.go
index b00940336..912e454d6 100644
--- a/internal/ingress/metric/collectors/testutils.go
+++ b/internal/ingress/metric/collectors/testutils.go
@@ -137,8 +137,8 @@ func (s metricSorter) Swap(i, j int) {
 }
 
 func (s metricSorter) Less(i, j int) bool {
-	sort.Sort(prometheus.LabelPairSorter(s[i].Label))
-	sort.Sort(prometheus.LabelPairSorter(s[j].Label))
+	sort.Sort(labelPairSorter(s[i].Label))
+	sort.Sort(labelPairSorter(s[j].Label))
 
 	if len(s[i].Label) != len(s[j].Label) {
 		return len(s[i].Label) < len(s[j].Label)
@@ -181,3 +181,19 @@ func normalizeMetricFamilies(metricFamiliesByName map[string]*dto.MetricFamily)
 	}
 	return result
 }
+
+// labelPairSorter implements sort.Interface. It is used to sort a slice of
+// dto.LabelPair pointers.
+type labelPairSorter []*dto.LabelPair
+
+func (s labelPairSorter) Len() int {
+	return len(s)
+}
+
+func (s labelPairSorter) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}
+
+func (s labelPairSorter) Less(i, j int) bool {
+	return s[i].GetName() < s[j].GetName()
+}