Next time a copper confiscates your drugs, don't be so sure they'll be getting handed into the police station's evidence room.

We're saying this because three Western Australia police officers tested positive for ecstasy and methamphetamine after apparently taking them at the Perth leg of Stereosonic.

Two men and one woman were part of a 200-strong drugs test at the beginning of the week after their seniors received a tip-off they'd been indulging at the mega event where Claude VonStroke, Hannah Wants and Duke Dumont were part of the line-up.

Even though they'll be getting a massive telling off, they won't be liable to a charge unfortunately because they weren't actually caught with anything. Where's the justice there?

Still, they probably won't be on the Christmas card list of Western Australia Police Commissioner Karl O'Callaghan.

He said: "I am aware that they were targeted tests based on intelligence we had received some information about these officers. At some stage they must have obtained it (the drugs) from somebody so that is a concern for me."

The war on party drugs isn't going too well when even the coppers are having a dabble, eh?