Halo 4 public testing is expected to begin this month

The final game in The Master Chief Collection will be playable for the first time on PC this month. With ODST out the door, 343 Industries is now getting Halo 4 ready for its debut, which means more public tests. 

Halo 4 ‘flighting’, as 343 Industries calls it, is expected to start this month, though a specific date has yet to be announced. The first test will focus on putting some new features and quality of life improvements through their paces and gathering feedback. 

source: gamezpot.com