Declan Kidney's first game as Ireland coach will be familiar surroundings as Canada visit Thomond Park on November 8, while New Zealand and Argentina will also take on the host nation at Croke Park on November 15 and 22 respectively.
McNaughton said: "We're of the understanding that the South African Test is not going to go ahead. We keep on trying to get updates ourselves from the people who are trying to organise the game, including the people in the IRFU.
"Our understanding is that the game won't be taking place but it's not out the door yet. If it doesn't go ahead, we don't anticipate arranging another Test in its place."