MSPs have been urged to stand up for the integrity of the Scottish Parliament and support calls for Michael Matheson to resign in a vote on Wednesday.
The Scottish Conservatives are bringing forward a vote on the former health secretary’s future as an MSP, which will call for parliament to demand that he quits.
There will also be a further vote in parliament this week on the sanctions facing Michael Matheson.
The Scottish Parliament Corporate Body has found Mr Matheson broke the MSP Code of Conduct.
This week, the cross-party Standards Committee recommended that Mr Matheson be banned from the chamber for 27 days and docked his salary for 54 days.
Yet John Swinney has said he will refuse to support the sanctions, which would mean Mr Matheson faces no penalty for making a false expenses claim for £11,000 and lying to the press, public and parliament.
Scottish Conservative leader Douglas Ross said: “We are bringing forward a vote calling on Michael Matheson to resign because his actions are clearly unacceptable for any MSP.
“In any other line of work, Michael Matheson would lose his job. MSPs cannot put themselves on a higher pedestal than others. We must be held to the same standards.
“However anyone in the chamber in other parties feels about Michael Matheson personally, the fact is he made a false claim for £11,000 of taxpayers’ money and then lied about it to the public, press and parliament.
“A cross-party group found he broke the MSP Code of Conduct and polls show that the public overwhelmingly agree that he should resign.
“MSPs must stand up for the integrity of the Scottish Parliament and restore public trust by voting in favour of our motion calling for Michael Matheson’s resignation.”