Willis (thumb) was a full practice participant Thursday, Bill Huber of SI.com reports.
Willis was limited in Wednesday's practice due to a right thumb injury, Matt Schneidman of The Athletic reports.
Willis completed 10 of 13 passes for 136 yards, rushed once for three yards and lost a fumble after replacing Jordan Love (elbow) in the second quarter of Sunday's 24-22 loss to the Bears.
Willis completed four of five pass attempts for 56 yards and a touchdown while rushing four times for 23 yards in Sunday's 30-27 win over Jacksonville.
Willis completed 13 of his 19 passes for 202 yards, one touchdown and no interceptions in Sunday's 30-14 win over the Titans. He added six rushes for 73 yards and an additional touchdown.
Willis will be the Packers' starting quarterback for Sunday's game at Tennessee with Jordan Love (knee) inactive, Mike Spofford of the team's official site reports.
Willis completed 12 of 14 passes for 122 yards with a touchdown and no interceptions and added six rushes for 41 yards in the Packers' 16-10 win over the Colts on Sunday.
Willis will start in place of QB Jordan Love (knee) with the latter inactive for Sunday's game versus the Colts, Mike Spofford of the Packers' official site reports.
Coach Matt LaFleur said Monday that Willis will start Sunday's game against the Colts over Sean Clifford if Jordan Love (knee) isn't cleared to play, Ryan Wood of USA Today reports.
Willis is expected to start at quarterback in the Packers' Week 2 game against the Colts on Sept. 15, Jay Glazer of Fox Sports reports.