Cardiff welcome Biarritz Olympique to the Arms Park on Saturday evening boosted by their demolition of Bridgend.
And Cardiff coach, former Wales captain Dai Young, has named himself amongst the replacements for the big match.
"This is going to be a big test of where we are on the European stage. We still have a lot of things to work on but we are playing the sort of rugby that will help us compete against most teams.
"We play Biarritz at home and then go to Ulster and we know we have to step up a few rungs on the ladder if we are going to compete with the likes of Biarritz," said Young.
"We have a young team that is still developing and gaining experience and, hopefully, the only way for us will be up."
Cardiff make five changes from the side that beat Bridgend. Jamie Robinson, Matt Allen and Iestyn Harris return to a back-line that includes Rhys Williams, and Craig Morgan.
Peter Rogers will play at loose-head, and in a positional switch Nack Walne moves back to the wing from outside centre.
Cardiff: Rhys Williams; Nick Walne, Jamie Robinson, Matt Allen, Craig Morgan; Iestyn Harris, Ryan Powell; Peter Rogers, Andrew Lewis, Ken Fourie, Heino Senekal, John Tait, Rob Appleyard, Dan Baugh, Martyn Willaims (captain)
David Young, Greg Woods, Adam Jones, Dan McShane, Richard Smith, Nicky Robinson, Anthony Sullivan.
Wales Head Coach Rob Howley talks to WRU TV's Sebastian Barrett about the 36-man squad he has just named for the forthcoming Under Armour series, which includes two uncapped players, Ospreys duo Sam Davies and Rory Thornton.
Head coach Rowland Phillips is deligthed he can now call BT Sport Cardiff Arms Park home for his Wales Women's side, who launch their international season next month with games against Scotland and UK Armed Forces in the heart of the capital city.
Wales Sevens star Sam Cross has put his home town club of Brynmawr on the map after winning a silver medal at the Rio Olympics with Team GB. His club have now honoured him by naming their players bar after him, as WRU TV discovered at the official launch, recently.
One of the newest members of the Principality Premiership, Bargoed admit it's proving to be a steep learning curve at the highest level, but are determined to become a force to be reckoned with. WRU TV visited the club last weekend when they took on Llanelli.
Table-topping Aberavon travel to north Wales to tackle RGC 1404 as both teams defend unbeaten starts to the season in the Principality Premiership. WRU TV's Graeme Gillespie visited the Wizards to see how their preparations were going for the game of the weekend.
The Half a Game initiative is currently sweeping across Wales and proving a major success. The scheme aims to give every young player at least half a game every weekend. WRU TV recently visited a festival in Narberth where clubs have fully embraced the initiative.
Both Bargoed and Swansea were seeking their first win of the Principality Premiership season this afternoon. It proved a fruitful day for the hosts - not only did they win, but Bargoed claimed a try bonus point.
Cardiff managed to keep their unbeaten record at home intact, but only just as Bridgend made them work extremely hard before the Blue and Blacks secured a hard fought Principality Premiership win at the BT Sport Arms Park last night.
Former Wales back row Andy Powell gives a guided tour of The Wern, home of Merthyr RFC, who are determined to prove a lot of people wrong and make their mark in their first season in the Principality Premiership.