diff --git a/test/e2e-tests.sh b/test/e2e-tests.sh
index fd42f5a6458..b6f7bccdf3d 100755
--- a/test/e2e-tests.sh
+++ b/test/e2e-tests.sh
@@ -264,8 +264,6 @@ echo "- Docker is ${KO_DOCKER_REPO}"
 
 trap teardown EXIT
 
-install_ko
-
 if (( ! USING_EXISTING_CLUSTER )); then
   # Start Knative Serving.
 
@@ -289,8 +287,6 @@ else
 fi
 
 
-(( IS_PROW )) && gcr_auth
-
 # Clean up anything that might still be around...
 teardown_k8s_events_test_resources
 
diff --git a/test/library.sh b/test/library.sh
index d7544b1b42d..d470a6c24c8 100755
--- a/test/library.sh
+++ b/test/library.sh
@@ -33,12 +33,6 @@ readonly OG_K8S_CLUSTER="${K8S_CLUSTER_OVERRIDE}"
 readonly OG_K8S_USER="${K8S_USER_OVERRIDE}"
 readonly OG_KO_DOCKER_REPO="${KO_DOCKER_REPO}"
 
-# Returns a UUID
-function uuid() {
-  # uuidgen is not available in kubekins images
-  cat /proc/sys/kernel/random/uuid
-}
-
 # Simple header for logging purposes.
 function header() {
   echo "================================================="
@@ -96,31 +90,6 @@ function acquire_cluster_admin_role() {
       --user=$1
 }
 
-# Authenticates the current user to GCR in the current project.
-function gcr_auth() {
-  echo "Authenticating to GCR"
-  # kubekins-e2e images lack docker-credential-gcr, install it manually.
-  # TODO(adrcunha): Remove this step once docker-credential-gcr is available.
-  gcloud components install docker-credential-gcr
-  docker-credential-gcr configure-docker
-  echo "Successfully authenticated"
-}
-
-# Installs ko in $OUTPUT_GOBIN
-function install_ko() {
-  GOBIN="${OUTPUT_GOBIN}" go install ./vendor/github.com/google/go-containerregistry/cmd/ko
-}
-
-# Runs ko; prefers using the one installed by install_ko().
-# Parameters: $1..$n - arguments to ko
-function ko() {
-  if [[ -e "${OUTPUT_GOBIN}/ko" ]]; then
-    "${OUTPUT_GOBIN}/ko" $@
-  else
-    ko $@
-  fi
-}
-
 # Waits until a namespace no longer exists
 # Parameters: $1 - namespace.
 function wait_until_namespace_does_not_exist() {