I can't load EV Code Signed drivers on Windows Test mode

Question

hi, MS

I've got the driver load error w/ our EV Code Signing drivers.

I can't load our drivers which signed as EV Code Signing drivers on Windows Test mode.

I have set test mode using "bcdedit -set testsigning on" etc... refer to below

I can load test signed drivers, but can't EV Code Signing drivers.

Of course, MS code signed drivers is no problem also.

Why EV Code Signed drivers can't be loaded on Windows Test mode?

Thanks in advance.