diff --git a/pkg/reconciler/broker/broker_test.go b/pkg/reconciler/broker/broker_test.go
index 3081a50c299..b8cd4fe14bc 100644
--- a/pkg/reconciler/broker/broker_test.go
+++ b/pkg/reconciler/broker/broker_test.go
@@ -48,6 +48,7 @@ import (
 	eventingv1 "knative.dev/eventing/pkg/apis/eventing/v1"
 	eventingv1alpha1 "knative.dev/eventing/pkg/apis/eventing/v1alpha1"
 	"knative.dev/eventing/pkg/apis/feature"
+	v1 "knative.dev/eventing/pkg/apis/messaging/v1"
 	"knative.dev/eventing/pkg/auth"
 	fakeeventingclient "knative.dev/eventing/pkg/client/injection/client/fake"
 	"knative.dev/eventing/pkg/client/injection/ducks/duck/v1/channelable"
@@ -405,6 +406,48 @@ func TestReconcile(t *testing.T) {
 					WithDLSNotConfigured(),
 					WithBrokerEventPoliciesReadyBecauseOIDCDisabled()),
 			}},
+		}, {
+			Name: "Propagate annotations",
+			Key:  testKey,
+			Objects: []runtime.Object{
+				makeDLSServiceAsUnstructured(),
+				NewBroker(brokerName, testNS,
+					WithBrokerClass(eventing.MTChannelBrokerClassValue),
+					WithBrokerConfig(config()),
+					WithInitBrokerConditions,
+					WithBrokerAnnotation(v1.AsyncHandlerAnnotation, "true")),
+				createChannel(withChannelReady),
+				imcConfigMap(),
+				NewEndpoints(filterServiceName, systemNS,
+					WithEndpointsLabels(FilterLabels()),
+					WithEndpointsAddresses(corev1.EndpointAddress{IP: "127.0.0.1"})),
+				NewEndpoints(ingressServiceName, systemNS,
+					WithEndpointsLabels(IngressLabels()),
+					WithEndpointsAddresses(corev1.EndpointAddress{IP: "127.0.0.1"})),
+			},
+			WantStatusUpdates: []clientgotesting.UpdateActionImpl{{
+				Object: NewBroker(brokerName, testNS,
+					WithBrokerClass(eventing.MTChannelBrokerClassValue),
+					WithBrokerConfig(config()),
+					WithBrokerAnnotation(v1.AsyncHandlerAnnotation, "true"),
+					WithBrokerReady,
+					WithDLSNotConfigured(),
+					WithBrokerAddressURI(brokerAddress),
+					WithChannelAddressAnnotation(triggerChannelURL),
+					WithChannelAPIVersionAnnotation(triggerChannelAPIVersion),
+					WithChannelKindAnnotation(triggerChannelKind),
+					WithChannelNameAnnotation(triggerChannelName),
+					WithBrokerEventPoliciesReadyBecauseOIDCDisabled()),
+			}},
+			WantPatches: []clientgotesting.PatchActionImpl{
+				{
+					ActionImpl: clientgotesting.ActionImpl{
+						Namespace: testNS,
+					},
+					Name:  fmt.Sprintf("%s-kne-trigger", brokerName),
+					Patch: []byte(`[{"op":"add","path":"/metadata/annotations/messaging.knative.dev~1async-handler","value":"` + "true" + `"}]`),
+								},
+			},
 		}, {
 			Name: "Successful Reconciliation with a Channel with CA certs",
 			Key:  testKey,
diff --git a/pkg/reconciler/testing/v1/broker.go b/pkg/reconciler/testing/v1/broker.go
index e4bfa7141e4..b04ed910d96 100644
--- a/pkg/reconciler/testing/v1/broker.go
+++ b/pkg/reconciler/testing/v1/broker.go
@@ -61,6 +61,15 @@ func WithBrokerFinalizers(finalizers ...string) BrokerOption {
 	}
 }
 
+func WithBrokerAnnotation(key, value string) BrokerOption {
+	return func(b *v1.Broker) {
+		if b.Annotations == nil {
+			b.Annotations = map[string]string{}
+		}
+		b.Annotations[key] = value
+	}
+}
+
 func WithBrokerResourceVersion(rv string) BrokerOption {
 	return func(b *v1.Broker) {
 		b.ResourceVersion = rv