Following the test in Auckland, Adamson was selected to play for Australia in all three matches of the Super League Test series against Great Britain in England. He was selected in the second row for the first test at London's famous Wembley Stadium which saw Australia win 38–14. He kept his place in the side for the second test at Old Trafford, won 20–12 by the Lions, and was relegated to the bench for the deciding test at Elland Road in Leeds as the Australian's wrapped up the series with a 37–20 win. While the games are regarded as full test matches by the Rugby League International Federation, the Australian Rugby League refuse to acknowledge the tests played under the Super League due to the Super League war, and in their official records the games are not recorded.