That's according to a tweet that Elon Musk sent out on Sunday.
The first tunnel is almost done— Elon Musk (@elonmusk) October 22, 2018
Musk announced on Twitter that the test track near Los Angeles will open December 10.
Virgin Hyperloop One is a rival concept that also seeks to move humans and materials at high speeds through a tube or tunnel system.
Just this month, the company released the first-ever hyperloop feasibility study that touts the economic benefits of tube travel.
Virgin Hyperloop One would connect Kansas City and St Louis -- normally a four-hour drive -- in under 30 minutes, and a ticket would cost less than a gallon of gas.