The Curiosity rover's drive system is working well, NASA has announced after several tests.
These included going forward about 4.5 metres (15 feet), rotating 120 degrees and then reversing about 2.5 metres (8 feet).
The mission's lead rover driver, Matt Heverly, said: "We have a fully functioning mobility system with lots of amazing exploration ahead."
Its first drive is scheduled for early September.
NASA's Mars rover Curiosity beamed Will.i.am's new song, Reach for the Stars, to earth.
The Black Eyed Peas rapper will debut his latest single Reach For The Stars on Mars tonight.
NASA has named the spot where its Curiosity rover landed on Mars 'Bradbury Landing' after the celebrated science-fiction author Ray Bradbury