There was smoke, there was fire-and, most importantly, nothing on the launch pad appeared to blow up.
The company did not immediately provide details about the technical performance of the booster during the test.
America's SpaceX company has conducted a key test ahead of the maiden flight of its new rocket - the Falcon Heavy.
The exercise, known as a static test fire, is created to test the Heavy engine's health, and collect data on its flight readiness.
When it finally flies, the Heavy will be the world's most powerful operational rocket, generating more than 5 million pounds of thrust at liftoff from 27 Merlin engines - nine per core vehicle.
SpaceX will now review the data to determine whether it needs to hold another test before the official Falcon Heavy launch.
There is a question as to how many big ("heavy") rockets are needed to meet expected demand.
After years of delays, the Falcon Heavy from SpaceX was sacked up at launch pad 39-A.
But the new capability would mean the firm in future has no hard launching the biggest military and commercial telecommunications satellites - and still recover all three first-stage boosters. "Generated quite a thunderhead of steam". SpaceX later clarified that the Heavy will aim for an orbit around the sun that will, at times, put the auto the same distance from the sun as Mars.
Two of the three Heavy boosters have launched before. That honor belongs to the Saturn V, the NASA rocket that was used for the Apollo moon landings and was retired in 1973.
Musk has repeatedly downplayed expectations for the rocket's first flight, saying previous year, "There's a lot of risk associated with Falcon Heavy, a real good chance that that vehicle does not make it to orbit".
The three-booster heavy-lift rocket can carry payloads that weigh as much as a 737 jetliner, with fuel, passengers, crew and their luggage.