Sander Stad shows how to test database restorations en masse using dbatools:
Testing your backups is a tedious job and it takes a lot of time which I as a DBA don’t have. I don’t have the time to restore a database, run a DBCC command for every database that’s backed up.
There is a solution and it’s called “Test-DbaLastBackup” which is part of the dbatools module.