Dear Personnel, It seems that the OST is failing due to a storage issue [1]. The failure is on the test_verify_and_remove_cloned_vm test which is not changed on the patch [2] . The engine log prints the error: 2020-12-01 13:07:48,297+01 ERROR [org.ovirt.engine.core.bll.storage.domain.AttachStorageDomainToPoolCommand] (default task-1) [] An error occurred while fetching unregistered disks from Storage Domain id '26d55c27-bf61-4f01-b5a3-d9a6a01c3e8a'2020-12-01 13:07:48,298+01 DEBUG [org.ovirt.engine.core.bll.storage.domain.AttachStorageDomainToPoolCommand] (default task-1) [] Skipping format update for domain '26d55c27-bf61-4f01-b5a3-d9a6a01c3e8a' (type 'ImportExport') and returns the following error: 2020-12-01 13:17:46,784+01 ERROR [org.ovirt.engine.api.restapi.resource.AbstractBackendResource] (default task-2) [] Operation Failed: [Cannot remove VM. The VM is performing an operation on a Snapshot. Please wait for the operation to finish, and try again.] Maybe there is a recent change causing a regression here? [1] https://jenkins.ovirt.org/job/ovirt-system-tests_standard-check-patch/14137/ [2] https://github.com/oVirt/ovirt-system-tests/blob/master/basic-suite-master/t... With Best Regards. Steven.