KENNEDY SPACE CENTER, Fla. — NASA will conduct a major test this weekend that will determine whether its colossal Space Launch System rocket is ready to blast off for a trip around the moon.

WATCH: Space Coast’s busy weeks ahead include launches to ISS, wet dress rehearsal for flight around moon

Launch teams will take their places for a “wet dress rehearsal” ahead of the Artemis 1 mission.

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Artemis 1 is a planned uncrewed flight test around the moon, and the two-day test will ensure that teams are ready to launch.

Photos: NASA crews move forward with last major tests of SLS rocket at Kennedy Space Center

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NASA crews move forward with last major tests of SLS rocket at Kennedy Space Center

The Artemis 1 wet dress rehearsal started Friday with a call to stations at the Kennedy Space Center’s Launch Control Center.

WATCH: NASA looks ahead to more trips to the moon beyond Artemis I

The wet dress rehearsal is the last major test ahead of the Artemis 1 launch.

NASA will not set a date for the launch of Artemis 1 until after its review of the wet dress rehearsal.

Time-lapse: NASA fully assembles SLS rocket ahead of Artemis mission to moon (WFTV)

Once the testing is complete, teams will drain the rocket and roll the SLS rocket back to the Vehicle Assembly Building.

WATCH: NASA’s Artemis 1 moon rocket to make first historic journey to the launch pad

NASA said activity at the launch pad won’t be visible during the majority of the testing, but some venting of the rocket may be seen on Sunday.

See more in the video above.

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