Do tests expire? Should I throw them away?

Tests eventually expire. When tests expire, they will be less able to correctly detect the presence of SARS-CoV-2, the virus that causes COVID-19. Different tests have different recommended shelf lives. Check the test packaging for the expiration date. Using an expired test is not harmful or dangerous, but your results may be less accurate. If the tests have been exposed to high heat or extreme cold, you should discard them to avoid a potentially inaccurate test result.