Do I need my parent with me when I take my drivers test?

I'm 16 and I live in Nevada and Ive had my learners permit for the required 6 months and when I got my permit my mom signed the liability form. My question is do I need her to be there again when I get my license to sign the form again or could I just have a friend with a registered vehicle with insurance to take me or would they have to be over 21?Do I need my parent with me when I take my drivers test?
Your parent or legal guardian.

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