[denimnerd42]

If the test is taken on personal laptops it's almost impossible to stop cheating. You can easily take video capture and send it out via 5g modem on a completely separate computer hidden inside of the laptop. Then you can receive answers back in very discreet ways like nearly imperceptible LEDs.

Same reason DRM-data rights management or DLP-data loss protection technologies are rather pointless against determined attackers. Anything that is permitted to be viewed can be copied.