False negatives?

Danielle💁🏼‍♀️🐶🐶

This might sound stupid, but I'm new to ovulation test. I sporadically used them. What I do learn about them, I learn on here. I started using Walmart brand test then switched to first response tests. My question is, can they give a false negative? Could the amount of urine cause a difference? Could the brand cause a difference?