El Dorado Dreaming has been withdrawn from the Tea Rose Stakes at Randwick after returning an irregularity to a prohibited substance.

The winner of the Group One ATC Sires' Produce Stakes in the autumn, El Dorado Dreaming was tested on Tuesday after an inspection of Ben Smith's Newcastle stable.

Racing NSW stewards went to the stable after two other horses produced swab irregularities.

They suspended Smith after finding him guilty of refusing to give evidence and of giving false evidence regarding unidentifiable and unlabelled substances in his stable.

El Dorado Dreaming was transferred to Kris Lees and was set to run in his name on Saturday pending the results of the swab.

After the result of Tuesday's swab became known on Friday, stewards attempted to get a further urine sample from the filly to be analysed on race eve but were unable to obtain one.

Smith has applied for a stay of proceedings pending an inquiry but this has not yet been determined.

Fellow Group One winner In Her Time has also been transferred to Lees. She had a race day gallop at Newcastle on Friday and is scheduled to run in the Premiere Stakes on September 22 in preparation for the $13 million Everest.