When astronauts Butch Wilmore and Suni Williams lifted off from Cape Canaveral Space Force Station in Florida on June 5, they thought they’d be back in plenty of time for the Juneteenth holiday.

The two were test-driving Boeing’s newest spaceship, called Starliner. All they had to do was put it through its paces, dock briefly with the International Space Station (ISS), and come home. The entire mission was supposed to last around a week.

Instead, a series of leaks and malfunctions have caused NASA to indefinitely delay the duo’s return.

Just whatever you do, don’t say they’re stranded.