Tory MP Mark Francois has said any attempt by Labour and the SNP to create an alliance in an effort to oust Boris Johnson would be “transparent” and “ridiculous”.
His comments come in the wake of shadow chancellor John McDonnell pledging that the Labour Party would not block a second Scottish independence referendum.
“I believe such an attempt will be seen for the transparent, ridiculous exercise that it would be," Mr Francois told talkRADIO's Julia Hartley-Brewer.
“Labour and the SNP are normally at each other’s throats in Scotland, but both desperate to overturn the will of the British people."
The Scottish first minister Nicola Sturgeon has hinted at forming an "alliance" with Labour to “lock the Tories out of government”.
And Labour leader Jeremy Corbyn has already promised that his party will table a vote of no confidence “at an appropriate time” when the government returns to Westminster after the summer recess.
However, Mr Francois said he believes the Prime Minister would win a vote of confidence, adding that it would “show Jeremy Corbyn up for the charlatan that the bloke’s been all his life".
As well as winning a confidence vote, the MP for Rayleigh and Wickford and Brexiteer has predicted that the Prime Minister will succeed in delivering Brexit by the Halloween deadline.
“I don’t think these people are bluffing, I voted for Boris because he promised me that we would leave on October 31 come hell or high water – I believe the Prime Minister.”