As we near completion of the 2.9 milestone, it’s that time of dev cycle again, when we ask all you community developers who’ve been putting off contributing to core to dust off your dev environments and help us get closer to being release-ready. How? Bug hunts! Yes, that time-honored tradition (in the time of WordPress, anyway) of everyone pitching in to test patches and report the results, working on solutions to major bugs, and helping to clear out Trac has come around again, and we’re scheduling not one, but two bug hunts over the next couple of weeks to ensure that everyone has enough time to prepare and participate
Follow this link:
Upcoming Bug Hunts!

