Professional proctored testing centers exist in many locations around the world now. It's not that complicated to have a couple people at the front, a method for physically screening test-takers, providing lockers for personal possessions, providing computers for test administration, and protocols for checking multiple points of identity for each test taker.

This hybrid model is vastly preferable to "true" remote test taking in which they try to do remote proctoring to the student's home using a camera and other tools.