St Mirren chief executive Tony Fitzpatrick said:
"We’ve learned at first hand within our club the importance of the testing regimen and 100% adherence to all social distancing and hygiene protocols.
"It is bitterly disappointing that our game tomorrow has been postponed, but it underlines the hugely damaging consequences of even one player disregarding the new rules. We absolutely support the stance of the SFA and the SPFL in this matter.
"These necessary steps are there to protect our game, our players and the very future of every single club in the country.
"The stakes could not be higher and that is why as a club we will be constantly reinforcing the need for personal responsibility and vigilance. The Scottish game simply cannot afford to shoot itself in the foot."