Scotland head coach Gregor Townsend will be preparing his team to face a struggling Wales side but Tandy accepts there will be a familiarity on both sides.
“They know a lot about me and I know a lot about the coaching staff,” stated Tandy.
“They were amazing and we went through a lot with World Cups and amazing moments in the Six Nations.
“They know how I go about things too but it’s probably a case of not overthinking it and delving into too much detail, because you can outthink yourself.”
Instead of working for Townsend, this time Tandy will be in direct opposition to his former boss.
“It’ll be great to see him after the game,” stated Townsend.
“We’ve been sharing messages, not many this week, but in the first couple of games.
“We think very fondly of Steve. He spent a long time with us, so he’s been a big influence on our players.
“He was a massive help to me as a coach, and I’m sure after the game, whatever the result, we can have a few beers in the changing room.”
Tandy added: “It’ll definitely be different!”
“He was brilliant for me, taught me lots about international rugby, encouraged me to be better and helped my growth and development.
“He pushed me to be out of my comfort zone and I feel your best growth comes when you get uncomfortable.”
It has been uncomfortable so far for Tandy in his new role.
In his six games in charge, Wales have lost five and conceded 302 points and 42 tries.
So what are his expectations for his home country against the nation that gave him his international break?
“The expectation is to be better than we were last week,” stated Tandy.
“We understand how good Scotland are as well, they beat England comfortably and should have beaten the All Blacks.
“It’s there in black and white, we’ve only won two games in 25 so it’s not going to come with a click of a finger.
“We believe in this group and if we are better than we were last week, I think will get closer to where we want to be.”