It had initially been suggested that the test, which takes place on July 17-19, would be closed to fans.
However, following discussions with the Formula One Teams' Association (FOTA), tickets for all three days are now available.
As well as on-track action from the 10 teams involved, teams have also agreed that show cars will be put on display at the end of each day.
The young driver test has been in the headlines recently, with Mercedes banned from it because of its secret Pirelli test, and some teams now pushing to let their race drivers take part to help F1's current tyre crisis.
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