This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/cups:2.4.11
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/cups:2.4.11-3.1156
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/cups:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.