diff --git a/apis/test/example/v1alpha1/doc.go b/apis/test/example/v1alpha1/doc.go
index fa5248c074..e3b0d4ddb8 100644
--- a/apis/test/example/v1alpha1/doc.go
+++ b/apis/test/example/v1alpha1/doc.go
@@ -15,5 +15,5 @@ limitations under the License.
 */
 
 // +k8s:deepcopy-gen=package
-// +groupName=sample.knative.dev
+// +groupName=example.knative.dev
 package v1alpha1
diff --git a/apis/test/example/v1alpha1/zz_generated.deepcopy.go b/apis/test/example/v1alpha1/zz_generated.deepcopy.go
index 3f3022004c..80d979adb4 100644
--- a/apis/test/example/v1alpha1/zz_generated.deepcopy.go
+++ b/apis/test/example/v1alpha1/zz_generated.deepcopy.go
@@ -2,7 +2,7 @@
 // +build !ignore_autogenerated
 
 /*
-Copyright 2020 The Knative Authors
+Copyright 2022 The Knative Authors
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
diff --git a/apis/test/pub/v1alpha1/doc.go b/apis/test/pub/v1alpha1/doc.go
index fa5248c074..b17817b28a 100644
--- a/apis/test/pub/v1alpha1/doc.go
+++ b/apis/test/pub/v1alpha1/doc.go
@@ -15,5 +15,5 @@ limitations under the License.
 */
 
 // +k8s:deepcopy-gen=package
-// +groupName=sample.knative.dev
+// +groupName=pub.knative.dev
 package v1alpha1
diff --git a/apis/test/pub/v1alpha1/zz_generated.deepcopy.go b/apis/test/pub/v1alpha1/zz_generated.deepcopy.go
index ef838bbfa4..b23519b695 100644
--- a/apis/test/pub/v1alpha1/zz_generated.deepcopy.go
+++ b/apis/test/pub/v1alpha1/zz_generated.deepcopy.go
@@ -2,7 +2,7 @@
 // +build !ignore_autogenerated
 
 /*
-Copyright 2020 The Knative Authors
+Copyright 2022 The Knative Authors
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
diff --git a/hack/generate-knative.sh b/hack/generate-knative.sh
index 931e0a425c..f48966789f 100755
--- a/hack/generate-knative.sh
+++ b/hack/generate-knative.sh
@@ -18,7 +18,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-# generate-groups generates everything for a project with external types only, e.g. a project based
+# generate-knative generates everything for a project with external types only, e.g. a project based
 # on CustomResourceDefinitions.
 
 if [ "$#" -lt 4 ] || [ "${1}" == "--help" ]; then
diff --git a/hack/update-codegen.sh b/hack/update-codegen.sh
index 4f9ffea2a6..a50b18f594 100755
--- a/hack/update-codegen.sh
+++ b/hack/update-codegen.sh
@@ -20,16 +20,8 @@ set -o pipefail
 
 source $(dirname $0)/../vendor/knative.dev/hack/codegen-library.sh
 
-# If we run with -mod=vendor here, then generate-groups.sh looks for vendor files in the wrong place.
-export GOFLAGS=-mod=
-
 echo "=== Update Codegen for $MODULE_NAME"
 
-# generate the code with:
-# --output-base    because this script should also be able to run inside the vendor dir of
-#                  k8s.io/kubernetes. The output-base is needed for the generators to output into the vendor dir
-#                  instead of the $GOPATH directly. For normal projects this can be dropped.
-
 group "Kubernetes Codegen"
 
 # Knative Injection
diff --git a/injection/README.md b/injection/README.md
index d7c80adaed..cbc204f95e 100644
--- a/injection/README.md
+++ b/injection/README.md
@@ -257,15 +257,6 @@ To make generating stubs simple, we have harnessed the Kubernetes
 code-generation tooling to produce `injection-gen`. Similar to how you might
 ordinarily run the other `foo-gen` processed:
 
-```shell
-CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${REPO_ROOT}; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
-
-${CODEGEN_PKG}/generate-groups.sh "deepcopy,client,informer,lister" \
-  github.com/knative/sample-controller/pkg/client github.com/knative/sample-controller/pkg/apis \
-  "samples:v1alpha1" \
-  --go-header-file ${REPO_ROOT}/hack/boilerplate/boilerplate.go.txt
-```
-
 To run `injection-gen` you run the following (replacing the import path and api
 group):
 
diff --git a/test/test-reconciler-codegen.sh b/test/test-reconciler-codegen.sh
index c6bb3e20c1..ad0dd88f59 100755
--- a/test/test-reconciler-codegen.sh
+++ b/test/test-reconciler-codegen.sh
@@ -30,30 +30,25 @@ rm -rf $(dirname $0)/genclient
 
 header "Test Generated Reconciler Builds."
 
-chmod +x ${CODEGEN_PKG}/generate-groups.sh
+source "${CODEGEN_PKG}/kube_codegen.sh"
 
-${CODEGEN_PKG}/generate-groups.sh "deepcopy,client,informer,lister" \
-  ${GENCLIENT_PKG} knative.dev/pkg/apis/test \
-  "example:v1alpha1" \
-  --go-header-file ${REPO_ROOT_DIR}/hack/boilerplate/boilerplate.go.txt
+kube::codegen::gen_helpers \
+  --boilerplate "${REPO_ROOT_DIR}/hack/boilerplate/boilerplate.go.txt" \
+  "${REPO_ROOT_DIR}/apis/test"
+
+kube::codegen::gen_client \
+  --boilerplate "${REPO_ROOT_DIR}/hack/boilerplate/boilerplate.go.txt" \
+  --output-dir "${REPO_ROOT_DIR}/test/genclient" \
+  --output-pkg "${GENCLIENT_PKG}" \
+  --with-watch \
+  "${REPO_ROOT_DIR}/apis/test"
 
 # Knative Injection
 ${KNATIVE_CODEGEN_PKG}/hack/generate-knative.sh "injection" \
   ${GENCLIENT_PKG} knative.dev/pkg/apis/test \
-  "example:v1alpha1" \
+  "example:v1alpha1,pub:v1alpha1" \
   --go-header-file ${REPO_ROOT_DIR}/hack/boilerplate/boilerplate.go.txt \
-  --force-genreconciler-kinds "Foo"
-
-${CODEGEN_PKG}/generate-groups.sh "deepcopy,client,informer,lister" \
-  ${GENCLIENT_PKG}/pub knative.dev/pkg/apis/test \
-  "pub:v1alpha1" \
-  --go-header-file ${REPO_ROOT_DIR}/hack/boilerplate/boilerplate.go.txt
-
-# Knative Injection
-${KNATIVE_CODEGEN_PKG}/hack/generate-knative.sh "injection" \
-  ${GENCLIENT_PKG}/pub knative.dev/pkg/apis/test \
-  "pub:v1alpha1" \
-  --go-header-file ${REPO_ROOT_DIR}/hack/boilerplate/boilerplate.go.txt
+  --force-genreconciler-kinds "Foo,Bar"
 
 if ! go build -v $(dirname $0)/genclient/... ; then
     exit 1