SpaceX is still working toward a test fire of a Falcon 9 rocket at Cape Canaveral today, a spokesperson has confirmed to Inverse. He couldn’t give a precise time — the nature of testing is uncertainty, he said.

The test fire of the rocket’s engines had originally been scheduled for yesterday.

The launch, expected approximately three days after a successful test fire, will carry 11 satellites that belong to communications company ORBCOMM into orbit.

It will be SpaceX’s first launch since June 28, when a Falcon 9 that was loaded with a Dragon capsule with cargo for the International Space Station blew apart two minutes after liftoff. That incident was the first failure in SpaceX’s 19 missions to date.

Photos via Stuart Rankin / Flickr