After the
Second World War Tester moved to Australia and embarked on careers in radio, theatre and television. After
television broadcasting began in Australia Tester soon found work hosting the localised version of the British panel game show ''
What's My Line?'' and in a variety of children's programmes including
Cabbage Quiz and
Kaper Kops with
Reg Gorman and
Rod Hull. He spent 15 years at
Channel Nine, taking charge of children's programming, and became more involved behind the scenes in production and publicity. He later moved to
Reg Grundy Productions, but eventually left the industry entirely due to a dislike of the overall management culture. Tester was the compere of "Desmond and the Channel 9-Pins," an Australian children's television series which aired from 1957 to 1962 on Sydney station TCN-9. He introduced the
Bee Gees for their first TV appearance in 1960. By 1961 Tester had retired from appearing on screen on the series, but continued to write, produce and direct the show. In 1974 he revived his stage acting career on the advice of
Hayes Gordon and appeared in numerous productions including productions by playwrights
Arthur Miller and John Ewing. He also had occasional minor roles in various films, such as
Barry McKenzie Holds His Own (1974) and
The Wild Duck (1983). ==Personal life and death==