Hi, Many projects are using data_utils library which is provided by Tempest for creating test resources with random resource names. Now the library is provided as stable interface (tempest.lib) and old unstable interface (tempest.common) will be removed after most projects are switching to the new one. We can see remaining projects from https://review.openstack.org/#/q/status:open+branch:master+topic:tempest-data_utils I hope these patches also can be merged before the patch(https://review.openstack.org/#/c/444472/) which removes the old one to keep all gates stable. Thanks Ken Ohmichi