The sniffles you get during a test by tilting your head downward and allowing your sinuses to drain out toward your nose (causing a runny nose). This is worsened by allergies or a recent illness. The only known cure for the Test Sniffles are to slump your back and shift your legs foward so that your head stays upright and your eyes peer downward.
I was failing an English test when I realized that suddenly, everyone in the room was sniffling. I quickly jumped out the window and drove home to submit a definition on Urban Dictionary before anyone else. I decided to call this phenomenon "Test Sniffles"