We have two ways of testing PCB. For small batch, it is tested by probe flying. For mass production,we will open an e-test fixture to test it. once second one piece, it is very fast. You can see how it runs from the video.

Prototype Orders:

Flying-Probe E-Test is always very fast and economical  for small volume and prototype orders . No matter you request or not in small orders, all PCBs we made will be Probe fly tested.  Fail rate of test will be less than 1%.

Production Orders:

We use testing fixtures for more than 3 square meters orders. The tester will check out whether there is  short circuits, open circuits, and make sure the nets of the PCB we made is the same as the nets in your Gerber. After testing is complete, the fail rate of your boards will be less than 0.1%.