With the legalization of cannabis still underway, failing a drug test in your prohibited state is totally a valid concern. But if you're using CBD-only products, you don't have much to worry about. Drug tests are looking for THC, the psychoactive cannabinoid that's identified as a Schedule I drug in the eyes of the DEA, not CBD. In all US states except for Indiana, CBD is completely legal. However, there are risks.
CBD concentrates are created differently by every company — some are derived from hemp, while others are from marijuana; some oils are pure CBD, while others contain small traces of THC. It's important to read the labels before purchasing. According to Herb, you would need to consume 1,000 to 2,000 mg of CBD in one day for a drug test to pick it up. That means you'd have to down an entire bottle or two of CBD oil, which is not recommended to begin with. The typical dose is around two droppers, or roughly 92 mg of extract. So unless you consume a whole lot of CBD, you should be in the clear. And even then, it'll show up as a false positive that could potentially be verified.
You'll also want to look out for trusted brands, such as Select and Charlotte's Web, for quality assurance. Most reliable companies will even offer third-party lab results for transparency. Moral of the story: stick with pure CBD products just to err on the safe side.