The Pakistan national cricket team toured Australia in the 1999–2000 season and played 3 Test matches against Australia. Australia won the series 3-0.
Test series summary
Pakistan also competed in a tri-nation ODI tournament involving Australia and India they won 4 of their 8 round robin matches. In the best of three final with Australia they lost 2-0.
References
Pakistani cricket team in Australia in 1999–2000 Wikipedia(Text) CC BY-SA