To test a selection or all the versions for the selected backup job, open the Test Backup window by pressing the Test button from the application's toolbar (or using the keyboard shortcut F9).
You can also test a backup execution if you switch to Backup View, right-click on a version and select Test.
While performing the operation, a Test icon appears in front of the icon of the backup job being tested.
If the test was executed automatically after backup and it failed, the Error icon appears in front of the backup job icon. Read the log file for details about the errors (View->Job Logs->Last Test log). The icon will disappear when the backup job will be successful.