diff --git a/CHANGELOG.md b/CHANGELOG.md
index 37749eb..e0f71d5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## Unreleased
 
+## 1.20.2 / 2024-10-15
+
+* [BUGFIX] testutil: Reverted functions using compareMetricFamilies are now failing if filtered metricNames are not in the input.
+
 ## 1.20.1 / 2024-08-20
 
 * [BUGFIX] process-collector: Fixed unregistered descriptor error when using process collector with `PedanticRegistry` on linux machines. #1587
@@ -18,7 +22,7 @@
 * [FEATURE] promlint: Add duplicated metric lint rule. #1472
 * [BUGFIX] promlint: Relax metric type in name linter rule. #1455
 * [BUGFIX] promhttp: Make sure server instrumentation wrapping supports new and future extra responseWriter methods. #1480
-* [BUGFIX] testutil: Functions using compareMetricFamilies are now failing if filtered metricNames are not in the input. #1424
+* [BUGFIX] **breaking** testutil: Functions using compareMetricFamilies are now failing if filtered metricNames are not in the input. #1424 (reverted in 1.20.2)
 
 ## 1.19.0 / 2024-02-27
 
diff --git a/VERSION b/VERSION
index 0044d6c..769e37e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.20.1
+1.20.2
diff --git a/prometheus/testutil/testutil.go b/prometheus/testutil/testutil.go
index fb1d51f..6f12001 100644
--- a/prometheus/testutil/testutil.go
+++ b/prometheus/testutil/testutil.go
@@ -158,6 +158,9 @@ func GatherAndCount(g prometheus.Gatherer, metricNames ...string) (int, error) {
 // ScrapeAndCompare calls a remote exporter's endpoint which is expected to return some metrics in
 // plain text format. Then it compares it with the results that the `expected` would return.
 // If the `metricNames` is not empty it would filter the comparison only to the given metric names.
+//
+// NOTE: Be mindful of accidental discrepancies between expected and metricNames; metricNames filter
+// both expected and scraped metrics. See https://github.com/prometheus/client_golang/issues/1351.
 func ScrapeAndCompare(url string, expected io.Reader, metricNames ...string) error {
 	resp, err := http.Get(url)
 	if err != nil {
@@ -185,6 +188,9 @@ func ScrapeAndCompare(url string, expected io.Reader, metricNames ...string) err
 
 // CollectAndCompare collects the metrics identified by `metricNames` and compares them in the Prometheus text
 // exposition format to the data read from expected.
+//
+// NOTE: Be mindful of accidental discrepancies between expected and metricNames; metricNames filter
+// both expected and collected metrics. See https://github.com/prometheus/client_golang/issues/1351.
 func CollectAndCompare(c prometheus.Collector, expected io.Reader, metricNames ...string) error {
 	reg := prometheus.NewPedanticRegistry()
 	if err := reg.Register(c); err != nil {
@@ -197,6 +203,9 @@ func CollectAndCompare(c prometheus.Collector, expected io.Reader, metricNames .
 // it to an expected output read from the provided Reader in the Prometheus text
 // exposition format. If any metricNames are provided, only metrics with those
 // names are compared.
+//
+// NOTE: Be mindful of accidental discrepancies between expected and metricNames; metricNames filter
+// both expected and gathered metrics. See https://github.com/prometheus/client_golang/issues/1351.
 func GatherAndCompare(g prometheus.Gatherer, expected io.Reader, metricNames ...string) error {
 	return TransactionalGatherAndCompare(prometheus.ToTransactionalGatherer(g), expected, metricNames...)
 }
@@ -205,6 +214,9 @@ func GatherAndCompare(g prometheus.Gatherer, expected io.Reader, metricNames ...
 // it to an expected output read from the provided Reader in the Prometheus text
 // exposition format. If any metricNames are provided, only metrics with those
 // names are compared.
+//
+// NOTE: Be mindful of accidental discrepancies between expected and metricNames; metricNames filter
+// both expected and gathered metrics. See https://github.com/prometheus/client_golang/issues/1351.
 func TransactionalGatherAndCompare(g prometheus.TransactionalGatherer, expected io.Reader, metricNames ...string) error {
 	got, done, err := g.Gather()
 	defer done()