The NSW government has lost its bid to stop parliamentary inquiries into state finances and capital works projects - including, possibly, its controversial stadiums plan.
The upper house on Thursday approved the creation of two new "super committees", with the support of Labor and the crossbench.
The Public Accountability Committee and the Public Works Committee were introduced by the Shooters, Fishers and Farmers Party.
The government's polarising $2.7 billion stadiums policy will likely fall into the sights of the capital works committee, marking another hurdle for Premier Gladys Berejiklian and her plans for the project.
The Liberal leader brushed off concerns about the committee on Wednesday, saying the parliament already had the power to investigate such projects.
During debate on the motions on Thursday, Energy Minister Don Harwin described the committees as "absolutely ridiculous".
"It is wrong and the government will oppose it as a matter of principal," Mr Harwin said of the Public Accountability Committee.