Unless the testing has deviated from the vacancy announcement from USAJOBS, candidates are required to pass a series of three tests. Typing speed, proofreading, and alpha/numeric filing. In regards to the typing speed they’re looking for a set amount of words per minute (wpm). If you’re not already typing daily on a keyboard then start now so that you can become comfortable. For the proofreading section an intro pocket reader for Freshmen English for college on Amazon/eBay with focus on punctuation and grammar will help you. For the alpha/numeric filing you need to just follow instructions.