The FDA is warning people not to use two unauthorized at-home COVID-19 tests.

First up is the Celltrion USA Inc. DiaTrust COVID-19 Ag Rapid Test, which comes in green-and-white packaging.

The other is the SD Biosensor Inc. Standard Q COVID-19 AG Home Test, packaged in a white-and-magenta box.

Neither test has been approved for use in the U.S. and could produce a false result, the FDA says.