- TestAdministratorsLastSuperuser (D-09): A and B reduce each other on the
five paths while a test transaction holds the guard's advisory lock until
pg_locks shows both requests waiting; one succeeds, one gets last_superuser
- TestAdministratorsLastSuperuserConcurrent: ten unsynchronized rounds
- TestAdministratorsLifecycle (D-10) and TestAdministratorsRevocation (D-12),
two-row bulk selections included
- TestActionExtensionBoot (-short) and TestActionExtensionRun (D-14, D-15)
- TestRolesLifecycle (D-16, D-17), TestRolesPermissionCeiling (D-07)
- TestBackendScreensActivation (-short, D-01, D-04)
