T he Food and Drug Administration warned consumers Monday to not use Cue Health’s at-home Covid-19 tests. This follows an FDA warning letter to the company last week that said Cue was not following the conditions stipulated in the emergency use authorizations for its tests.

Anyone experiencing problems with the test, including suspected false results, can report it to the FDA. According to the FDA, Cue Health changed the formulation of the part of the test that detects SARS-CoV-2. It also updated the test to detect and correct for failures.