Part 1 (testing with path applied)

• in Admin Console:
  1. login to the Admin Console
  2. go to the Configuration → Website → Scheduled Tasks section
  3. delete any scheduled task, but remember which one
• in DB:
  1. rename any of the non-critical DB columns (e.g. SiteDomainLimitation) in the ScheduledTasks table by adding _ in front of it's name
• in Admin Console:
  1. go to the Tools → System Tools section
  2. trigger Unit Config Cache rebuild by using the Reset button under the Reset Parsed and Cached System Data heading
  3. go to the Configuration → Website → Scheduled Tasks section
  4. confirm, that previously deleted scheduled task record was recreated
  5. restore original name of the above-renamed column

Part 2 (testing without patch applied)

1. revert the patch, that was applied
2. repeat the Part 1 plan
3. (instead of original confirm, ...) confirm, that you'll get an exception about attempt use an absent column in the ScheduledTasks DB table