Racing Victoria stewards are continuing investigations into a horse trained by Mike Moroney returning a positive test to a banned substance.

The Moroney-trained Equestria was tested following his win in a benchmark 64 class race at Bendigo on March 6.

Racing Analytical Services Limited reported a post-race urine sample contained Dexamethasone, a short acting corticosteroid.

The Flemington trainer was first informed of the irregularity on May 4.

Moroney has since been told of the confirmatory test result as stewards continue their investigations.

Credit: AAP