What's the difference between win 10 test mode and normal mode? How to turn off win 10 test mode? Solution system test mode refers to the system disabling driver forced signature mode, which is used to turn off the system driver signature and install some unsigned drivers and programs. Right-click the start button, select the command prompt (administrator), open the life prompt, enter: bcdedit /set testsigning off, and then press enter to execute, and then exit the mode of testing Win 10.