Controversial welfare drug test plans have been revived by Social Services Minister Dan Tehan, who wants opponents to "be brave" and support them.
Controversial plans to drug test welfare recipients will help reassure taxpayers their money isn't being used to subsidise drug dealers, the federal government says.
The coalition introduced laws into parliament on Wednesday to set up a trial in which people on welfare will be drug tested and offered treatment.
"The community has a right to expect that taxpayer-funded welfare payments are not being used to fund drug addiction, and that job seekers do all they can to get a job," Social Services Minister Dan Tehan told parliament on Wednesday.
"We don't want our welfare system subsidising drug dealers."
Mr Tehan said the trial would be rolled out across three sites in NSW, Queensland and Western Australia from April, if it passes parliament.
The government will provide up to $10 million for additional drug and alcohol treatment support across the three sites.
There will also be $1 million for an independent, third party evaluation of the trial which Mr Tehan said would prevent "unintended consequences".
He said the proposal wasn't about penalising people with drug abuse issues.
"It is about finding new and better ways of identifying these jobseekers and ensuring they are referred to the support and treatment they need," he said.
Anyone who tests positive will be shunted onto cashless welfare cards, while those who fail more than once will be referred to medical professionals for treatment.
Jobseekers who refuse a drug test will have their payments cancelled and they'll be barred from reapplying for four weeks.
Mr Tehan has urged opponents to "be brave" and back the trial.
The Turnbull government had originally hoped to drug test 5000 Newstart and Youth Allowance recipients across three trial sites in NSW, Queensland and Western Australia from January.
But the government acknowledged in December it did not have the numbers in the Senate to pass it, and the trial was stripped out of a welfare reform bill.
Labor said there was no change to its opposition to the proposed laws.
Greens leader Richard Di Natale said the government hadn't consulted its own drug and alcohol advisory group about the proposal because they didn't want to hear the truth that it was cruel and wasteful.
"If the government knows that its own experts won't support its plan, why should they expect anyone else to?" Senate Di Natale said in a statement.
Penington Institute chief executive John Ryan called for the bill to be scrapped.
"These are people who rely on these social security payments for the bare necessities and this plan risks pushing them into crime or homelessness," he said.