Have an extra home test on hand if you do this. DH and I did our Optum tests before our last cruise and DH's did not work (the solution did not move up the test strip). Optum said they'd mail a new one overnight, but they did not send it to the address he requested, but to our home address (we were already at port city). Luckily, a nearby Walgreens was able to get him in last minute for a NAAT. Stressful, though.