diff --git a/pkg/adapter/apiserver/delegate.go b/pkg/adapter/apiserver/delegate.go
index fdea48f91dd..b6616e786da 100644
--- a/pkg/adapter/apiserver/delegate.go
+++ b/pkg/adapter/apiserver/delegate.go
@@ -131,3 +131,8 @@ func (a *resourceDelegate) Replace([]interface{}, string) error {
 func (a *resourceDelegate) Resync() error {
 	return nil
 }
+
+// Implements cache.Store
+func (a *resourceDelegate) Bookmark(obj interface{}) error {
+	return nil
+}
diff --git a/pkg/adapter/apiserver/delegate_test.go b/pkg/adapter/apiserver/delegate_test.go
index d2d978b1f5a..15308bfa15b 100644
--- a/pkg/adapter/apiserver/delegate_test.go
+++ b/pkg/adapter/apiserver/delegate_test.go
@@ -71,6 +71,7 @@ func TestResourceStub(t *testing.T) {
 	d.GetByKey("")
 	d.Replace(nil, "")
 	d.Resync()
+	d.Bookmark(nil)
 }
 
 func TestFilterFails(t *testing.T) {
diff --git a/pkg/adapter/apiserver/filter.go b/pkg/adapter/apiserver/filter.go
index a475fc0765c..f80b517bbf8 100644
--- a/pkg/adapter/apiserver/filter.go
+++ b/pkg/adapter/apiserver/filter.go
@@ -95,3 +95,8 @@ func (c *controllerFilter) Replace([]interface{}, string) error {
 func (c *controllerFilter) Resync() error {
 	return nil
 }
+
+// Implements cache.Store
+func (c *controllerFilter) Bookmark(obj interface{}) error {
+	return nil
+}
diff --git a/pkg/adapter/apiserver/filter_test.go b/pkg/adapter/apiserver/filter_test.go
index c579f0d3a83..75444fc0b60 100644
--- a/pkg/adapter/apiserver/filter_test.go
+++ b/pkg/adapter/apiserver/filter_test.go
@@ -95,6 +95,18 @@ func TestControllerDeleteEventWithGoodControllerNoAPIVersion(t *testing.T) {
 	validateSent(t, tc, sources.ApiServerSourceDeleteRefEventType)
 }
 
+func TestControllerStub(t *testing.T) {
+	c, _ := makeController("v1", "Pod")
+
+	c.List()
+	c.ListKeys()
+	c.Get(nil)
+	c.GetByKey("")
+	c.Replace(nil, "")
+	c.Resync()
+	c.Bookmark(nil)
+}
+
 func makeController(apiVersion, kind string) (*controllerFilter, *adaptertest.TestCloudEventsClient) {
 	delegate, tc := makeRefAndTestingClient()
 	return &controllerFilter{
diff --git a/pkg/adapter/apiserver/ref_test.go b/pkg/adapter/apiserver/ref_test.go
index 43241e73b8e..1f5706b24fc 100644
--- a/pkg/adapter/apiserver/ref_test.go
+++ b/pkg/adapter/apiserver/ref_test.go
@@ -68,4 +68,5 @@ func TestRefStub(t *testing.T) {
 	d.GetByKey("")
 	d.Replace(nil, "")
 	d.Resync()
+	d.Bookmark(nil)
 }