# Change the revision tag to reference the "1-8-1" revision
  istioctl tag set prod --revision 1-8-1 --overwrite

  # Make revision "1-8-1" the default revision, both resulting in that revision handling injection for "istio-injection=enabled"
  # and validating resources cluster-wide
  istioctl tag set default --revision 1-8-1

  # Rollout namespace "test-ns" to update workloads to the "1-8-1" revision