There are two ways to remove the "Test Mode" text in the bottom right of your screen after adding - strap and -driver.

So if the question is, "How do I remove Test Mode message" you can also use the following command, run CMD as Admin.

"bcdedit -set TESTSIGNING off"

Then reboot your system, and your good. But you can also do what was instructed in the "Readme" File

Just wanted to share, if no one else mentioned it.