Scottish Conservative leader Ruth Davidson has said Theresa May has her “full support” ahead of a vote on the prime minister’s future.
Ms Davidson, who is on maternity leave after giving birth last month, tweeted that Mrs May has “cojones of steel”.
Ten of her 13 Scottish Conservative MPs – including Scottish Secretary David Mundell – have said they will back the prime minister in the confidence vote.
The position of the remaining three MPs is not yet known.
They include Ross Thomson and Douglas Ross, who have both been critical of Mrs May’s Brexit deal in the past.
Theresa May faces no confidence vote
Tory MPs take sides ahead of crucial vote
Another MP – John Lamont – said he would not be commenting ahead of the vote as he is a member of the executive of the 1922 Committee of backbench Conservatives.
The confidence vote on Mrs May’s leadership was triggered when the required 48 letters calling for a contest were delivered.
Conservative MPs will vote from 18:00 until 20:00 on Wednesday, with the result expected an hour or so later. Mrs May needs to win a majority of the votes in order to continue as leader.
She has said she will contest the vote “with everything I have got”, and has warned that a new prime minister would have to scrap or extend Article 50, the mechanism taking Britain out of the EU on 29 March. Mrs May said this would delay or even stop Brexit. Losing the vote would trigger a Conservative leadership contest in which she could not stand.
There is also an option that even if Mrs May wins – but not overwhelmingly – she may decide to stand down.
Speaking outside 10 Downing Street on Wednesday morning, Mrs May said changing Conservative leader would “put our country’s future at risk and create uncertainty when we can least afford it”. She was later greeted with cheers from the Tory benches when she arrived in the Commons for prime minister’s questions.