Quebec's Court of Appeal has rejected the latest attempt from Tony Accurso to avoid testifying before the Charbonneau Commission.
Accurso was subpoenaed a year ago and has repeatedly launched legal challenges in hopes he would not appear before the corruption inquiry.
One challenge went to the Supreme Court of Canada which refused to hear the case.
On May 1 Quebec's Superior Court refused to quash the subpoena, and last week the Court of Appeal agreed it would hear the case.
Upon reviewing the petition, the Appeal court justice rejected the challenge.
Accurso is charged with multiple counts of fraud, corruption, and other charges stemming from allegedly bribing public officials to win contracts for his construction companies.
Many politicians and civil servants have been photographed vacationing with Accurso, especially on his former yacht The Touch -- and some of those people have already testified before the commission.
The Charbonneau commission will hear from witnesses for another three weeks and then take a break from public hearings for the summer, giving Accurso to still win his case by outlasting the inquiry, which is scheduled to wrap up in December.
Accurso has 60 days to file an appeal with the Supreme Court of Canada.
His first criminal trial begins in November.
