diff --git a/model/labels_test.go b/model/labels_test.go
index e66e3316..31717b4e 100644
--- a/model/labels_test.go
+++ b/model/labels_test.go
@@ -142,6 +142,11 @@ func TestValidationScheme_IsLabelNameValid(t *testing.T) {
 			legacyValid: false,
 			utf8Valid:   false,
 		},
+		{
+			ln:          "dot.in.name",
+			legacyValid: false,
+			utf8Valid:   true,
+		},
 		{
 			ln:          "",
 			legacyValid: false,
diff --git a/model/metric_test.go b/model/metric_test.go
index e3573ed2..8a8bec95 100644
--- a/model/metric_test.go
+++ b/model/metric_test.go
@@ -348,6 +348,11 @@ func TestValidationScheme_IsMetricNameValid(t *testing.T) {
 			legacyValid: false,
 			utf8Valid:   false,
 		},
+		{
+			mn:          "dot.in.name",
+			legacyValid: false,
+			utf8Valid:   true,
+		},
 	}
 	for _, s := range scenarios {
 		t.Run(fmt.Sprintf("%s,%t,%t", s.mn, s.legacyValid, s.utf8Valid), func(t *testing.T) {