Nicola Sturgeon has said the candidates standing to succeed her as First Minister have "to expect scrutiny of their views".
It follows a storm over comments made by Kate Forbes on issues including same-sex marriage and children born out of wedlock.
Humza Yousaf, the frontrunner to become the next SNP leader, has also faced questions over why he missed the final vote on the legislation that legalised gay weddings in 2014.
