Star jockey William Pike led This'll Testya ($1.40) to victory in the $20,000 Country Comfort Perth Maiden (1100 metres) on Sunday afternoon.
In first place past the 800-metre mark and the turn, the bay mare held her position on the home straight.
The race favourite finished a full 4.6 lengths ahead of second-placed Tinto Belle and Pip.
Rider Jason Whiting and Bruce Watkins-trained River Beau ($6) produced a stellar performance in the 1100m Moshi Moshi Marketing Maiden.
Moving up from fourth to first on the straight, the bay gelding narrowly beat out race favourite Jakestar.
Led by rider Willie White, Malakhai ($8) secured the $11,800 first prize in the Furphy - Refreshing Ale Maiden (1675m).
After settling in fifth, Malakhai moved up the field before taking the lead.
The bay gelding crossed the line ahead of Orasky, Dreamy Alice, and The Divine Wind.
Bay colt Exclusive Zulu (race favourite at $2.50) led from start to finish in the 1400m TABtouch - Better your Bet Maiden.
Justin Warwick-trained Too Fat Too Slow placed second, ahead of Night Session and Vital Call.
Rider Lucy Warwick and First Black ($7.50) came from behind to win the 2000m Qube Bulk Transport Handicap.
Alyawaare Miss ($71) took out the Suez Recycling and Recovery Handicap (1000m), before Nelson's Flight ($3.60, race favourite) conquered the 1400m Capel Vale Winery Handicap.
The Bunbury Turf Club will host another day of racing action on Thursday, November 28.