What are the "additional actions" available for "Recovery Pending" databases?
Since this is a test server, the best choice would be simply to run RESTORE DATABASE [db_name] WITH RECOVERY; for each database that is in Recovery Pending state.  Check the Microsoft Docs page for RESTORE DATABASE with recovery only for further details.

This code will generate the statements for all databases in recovery pending:

SELECT 'RESTORE DATABASE ' + quotename(d.name) + ' WITH RECOVERY;'
FROM sys.databases d
WHERE d.state_desc = 'RECOVERY_PENDING'
ORDER BY d.name;