Kraigg Brathwaite has stepped down as West Indies Test captain ahead of their upcoming home season, while Shai Hope has replaced Rovman Powell as the T20I captain in addition to his responsibilities as the ODI captain.
Cricket West Indies said they would name a new Test captain "in the coming weeks".
"Kraigg Brathwaite has officially stepped down as Test captain, having first indicated his intention to do so to CWI leadership earlier this year ahead of the completion of the West Indies' successful tour of Pakistan," the board said in a statement. "Understanding the importance of continuity, Brathwaite wanted to ensure the team had a period of transition before his departure.
"As a result, he has submitted his resignation ahead of the home series against Australia, giving the new leadership time to establish itself. This series will be particularly special, allowing Brathwaite, who is two matches shy of 100 Test matches, to double down on his batting without added responsibility."