SAT test without last name

Hi, my name is Ravi and I have applied for SAT in August. I don’t have any last name so CB told me to put NONAME in the last name field and it worked. I know I am not the only person without a last name who applied for this test, I am just a little bit worried what will happen on the test day, is there anyone who faced the same problem when applying for SAT and what was your experience on the test day? Sorry for the grammatical mistakes.

I think the critical issue is whether your stated name matches the name on your ID.

https://collegereadiness.collegeboard.org/sat/taking-the-test/id-requirements

“If you need to make a change to your name after registering, please contact Customer Service at least 30 days prior to your intended test date. Middle names and initials are optional on your documents; however, if provided, the middle initial must exactly match the first letter of your middle name on your ID.”

The other thing would be to bring a copy of the email from the CB.

I have talked to CB customer rep they told me that all staff knows what NONAME means and there should be no problem in entering the test centre but, when I fill my answer sheet do I need to bubble NONAME as my last name or leave it blank?