https://www.gamespot.com/articles/pubgs-final-sanhok-map-test-extended/1100-6459423/

If you've yet to participate in PlayerUnknown's Battlegrounds' latest Sanhok test, you now have another opportunity to try the tropical map out before it arrives in the live game. The test was originally scheduled to end on June 4, but developer PUBG Corp. has extended it a few more days to June 7.

On Twitter, PUBG Corp. announced that the Sanhok test is now slated to run until Thursday at 7 AM PT / 10 AM ET / 3 PM BST. As before, it's open to all players who own PUBG on PC. To participate, you'll need to download the Experimental Server client from your Steam library.