A Michigan woman was forced to quarantine in an airplane bathroom for five hours after she tested positive while in the air.

Marisa Fotieo took the rapid test when her throat started feeling sore, Today reports. The flight had about 150 people who traveled from Chicago to Reykjavik, Iceland on Dec. 20.

“I just took my rapid test and I brought it into the bathroom, and within what felt like two seconds there were two lines,” Fotieo told Today. meaning it was positive. “My biggest fear was giving it to [the passengers].”