diff --git a/pkg/apis/messaging/v1/subscription_validation_test.go b/pkg/apis/messaging/v1/subscription_validation_test.go
index e31086eba6..a330806b6b 100644
--- a/pkg/apis/messaging/v1/subscription_validation_test.go
+++ b/pkg/apis/messaging/v1/subscription_validation_test.go
@@ -217,6 +217,21 @@ func TestSubscriptionSpecValidation(t *testing.T) {
 			},
 		},
 		want: apis.ErrMissingField("subscriber.ref.name"),
+	}, {
+		name: "missing name in Subscriber.Ref",
+		c: &SubscriptionSpec{
+			Channel:    getValidChannelRef(),
+			Subscriber: getValidDestination(),
+			Reply: &duckv1.Destination{
+				Ref: &duckv1.KReference{
+					Namespace:  namespace,
+					Name:       "",
+					Kind:       channelKind,
+					APIVersion: channelAPIVersion,
+				},
+			},
+		},
+		want: apis.ErrMissingField("reply.ref.name"),
 	}}
 
 	for _, test := range tests {