diff --git a/go.mod b/go.mod
index 9cf136eb39..35904d311b 100644
--- a/go.mod
+++ b/go.mod
@@ -43,7 +43,7 @@ require (
 	github.com/hetznercloud/hcloud-go/v2 v2.29.0
 	github.com/ionos-cloud/sdk-go/v6 v6.3.4
 	github.com/json-iterator/go v1.1.12
-	github.com/klauspost/compress v1.18.1
+	github.com/klauspost/compress v1.18.2
 	github.com/kolo/xmlrpc v0.0.0-20220921171641-a4b6fa1dd06b
 	github.com/linode/linodego v1.60.0
 	github.com/miekg/dns v1.1.68
@@ -56,7 +56,7 @@ require (
 	github.com/ovh/go-ovh v1.9.0
 	github.com/prometheus/alertmanager v0.28.1
 	github.com/prometheus/client_golang v1.23.2
-	github.com/prometheus/client_golang/exp v0.0.0-20250914183048-a974e0d45e0a
+	github.com/prometheus/client_golang/exp v0.0.0-20251212205219-7ba246a648ca
 	github.com/prometheus/client_model v0.6.2
 	github.com/prometheus/common v0.67.4
 	github.com/prometheus/common/assets v0.2.0
diff --git a/go.sum b/go.sum
index 579e86ca58..0aa41a311b 100644
--- a/go.sum
+++ b/go.sum
@@ -302,8 +302,8 @@ github.com/keybase/go-keychain v0.0.1 h1:way+bWYa6lDppZoZcgMbYsvC7GxljxrskdNInRt
 github.com/keybase/go-keychain v0.0.1/go.mod h1:PdEILRW3i9D8JcdM+FmY6RwkHGnhHxXwkPPMeUgOK1k=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
-github.com/klauspost/compress v1.18.1 h1:bcSGx7UbpBqMChDtsF28Lw6v/G94LPrrbMbdC3JH2co=
-github.com/klauspost/compress v1.18.1/go.mod h1:ZQFFVG+MdnR0P+l6wpXgIL4NTtwiKIdBnrBd8Nrxr+0=
+github.com/klauspost/compress v1.18.2 h1:iiPHWW0YrcFgpBYhsA6D1+fqHssJscY/Tm/y2Uqnapk=
+github.com/klauspost/compress v1.18.2/go.mod h1:R0h/fSBs8DE4ENlcrlib3PsXS61voFxhIs2DeRhCvJ4=
 github.com/knadh/koanf/maps v0.1.2 h1:RBfmAW5CnZT+PJ1CVc1QSJKf4Xu9kxfQgYVQSu8hpbo=
 github.com/knadh/koanf/maps v0.1.2/go.mod h1:npD/QZY3V6ghQDdcQzl1W4ICNVTkohC8E73eI2xW4yI=
 github.com/knadh/koanf/providers/confmap v1.0.0 h1:mHKLJTE7iXEys6deO5p6olAiZdG5zwp8Aebir+/EaRE=
@@ -438,8 +438,8 @@ github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5Fsn
 github.com/prometheus/client_golang v1.4.0/go.mod h1:e9GMxYsXl05ICDXkRhurwBS4Q3OK1iX/F2sw+iXX5zU=
 github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h0RJWRi/o0o=
 github.com/prometheus/client_golang v1.23.2/go.mod h1:Tb1a6LWHB3/SPIzCoaDXI4I8UHKeFTEQ1YCr+0Gyqmg=
-github.com/prometheus/client_golang/exp v0.0.0-20250914183048-a974e0d45e0a h1:RF1vfKM34/3DbGNis22BGd6sDDY3XBi0eM7pYqmOEO0=
-github.com/prometheus/client_golang/exp v0.0.0-20250914183048-a974e0d45e0a/go.mod h1:FGJuwvfcPY0V5enm+w8zF1RNS062yugQtPPQp1c4Io4=
+github.com/prometheus/client_golang/exp v0.0.0-20251212205219-7ba246a648ca h1:BOxmsLoL2ymn8lXJtorca7N/m+2vDQUDoEtPjf0iAxA=
+github.com/prometheus/client_golang/exp v0.0.0-20251212205219-7ba246a648ca/go.mod h1:gndBHh3ZdjBozGcGrjUYjN3UJLRS3l2drALtu4lUt+k=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.2.0/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
diff --git a/storage/remote/write_handler_test.go b/storage/remote/write_handler_test.go
index 2610142db9..82cb000be7 100644
--- a/storage/remote/write_handler_test.go
+++ b/storage/remote/write_handler_test.go
@@ -1520,19 +1520,23 @@ func TestRemoteWriteHandler_ResponseStats(t *testing.T) {
 
 	for _, tt := range []struct {
 		msgType            remoteapi.WriteMessageType
+		payload            []byte
 		forceInjectHeaders bool
 		expectHeaders      bool
 	}{
 		{
 			msgType: remoteapi.WriteV1MessageType,
+			payload: payloadV1,
 		},
 		{
 			msgType:            remoteapi.WriteV1MessageType,
+			payload:            payloadV1,
 			forceInjectHeaders: true,
 			expectHeaders:      true,
 		},
 		{
 			msgType:       remoteapi.WriteV2MessageType,
+			payload:       payloadV2,
 			expectHeaders: true,
 		},
 	} {
@@ -1552,11 +1556,11 @@ func TestRemoteWriteHandler_ResponseStats(t *testing.T) {
 			if tt.forceInjectHeaders {
 				base := handler
 				handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-					base.ServeHTTP(w, r)
-
 					// Inject response header. This simulates PRWv1 server that uses PRWv2 response headers
 					// for confirmation of samples. This is not against spec and we support it.
-					w.Header().Set(rw20WrittenSamplesHeader, fmt.Sprintf("%d", len(appendable.samples)))
+					w.Header().Set(rw20WrittenSamplesHeader, "2")
+
+					base.ServeHTTP(w, r)
 				})
 			}
 
@@ -1565,14 +1569,9 @@ func TestRemoteWriteHandler_ResponseStats(t *testing.T) {
 			// Send message and do the parse response flow.
 			c := &Client{Client: srv.Client(), urlString: srv.URL, timeout: 5 * time.Minute, writeProtoMsg: tt.msgType}
 
-			payload := payloadV2
-			if tt.msgType == remoteapi.WriteV1MessageType {
-				payload = payloadV1
-			}
-			stats, err := c.Store(t.Context(), payload, 0)
+			stats, err := c.Store(t.Context(), tt.payload, 0)
 			require.NoError(t, err)
 
-			fmt.Println(stats)
 			if tt.expectHeaders {
 				require.True(t, stats.Confirmed)
 				require.Equal(t, len(appendable.samples), stats.Samples)