The thing about alcohol is that once it's in your system it's not really possible to get it out, this is true for both blood and urine and all the stuff you might hear about taking showers or exercising or drinking lots of water (or dieuretics) to get the alcohol out doesn't really work. If you drank within 24 hours of a urine test, you will most likely fail the alcohol test (Determining How Long Alcohol Stays In Your Urine System | Addict Help).However, unless you are in some sort of treatment program or applying for really specific jobs that tests specifically for alcohol, you might not be tested for alcohol at all. your average drug test won't include alcohol, it'll only test for illegal substances.