diff --git a/docs/eventing/samples/sinkbinding/README.md b/docs/eventing/samples/sinkbinding/README.md
index 5df301ccad5..5788b2a351d 100644
--- a/docs/eventing/samples/sinkbinding/README.md
+++ b/docs/eventing/samples/sinkbinding/README.md
@@ -122,7 +122,6 @@ apiVersion: batch/v1beta1
 kind: CronJob
 metadata:
   name: heartbeat-cron
-spec:
 spec:
   # Run every minute
   schedule: "* * * * *"
diff --git a/docs/eventing/samples/sinkbinding/heartbeats-source.yaml b/docs/eventing/samples/sinkbinding/heartbeats-source.yaml
index d7d25048321..5d293c885ce 100644
--- a/docs/eventing/samples/sinkbinding/heartbeats-source.yaml
+++ b/docs/eventing/samples/sinkbinding/heartbeats-source.yaml
@@ -16,7 +16,6 @@ apiVersion: batch/v1beta1
 kind: CronJob
 metadata:
   name: heartbeat-cron
-spec:
 spec:
   # Run every minute
   schedule: "* * * * *"
diff --git a/docs/eventing/samples/sinkbinding/sinkbinding.yaml b/docs/eventing/samples/sinkbinding/sinkbinding.yaml
index 10f49956af3..0bbe3b5dc9b 100644
--- a/docs/eventing/samples/sinkbinding/sinkbinding.yaml
+++ b/docs/eventing/samples/sinkbinding/sinkbinding.yaml
@@ -29,3 +29,7 @@ spec:
       apiVersion: serving.knative.dev/v1
       kind: Service
       name: event-display
+  ceOverrides:
+    extensions:
+      sink: bound
+