Harlequins may be unbeaten this season but director of rugby Conor O'Shea believes he will find out exactly where his team are when they host Toulouse at the Stoop on Friday evening.
The Amlin Challenge Cup Champions have won all 14 of their outings this season, including their opening two Heineken Cup games against Connacht and Gloucester.
They now face back-to-back games against Toulouse, who O'Shea reckons are the greatest side in 'Heineken Cup history.'
"We'll see where we are as a team on Friday," he told BBC.
"They're the greatest side in Heineken Cup history.
"It's the ultimate test - they can pick two sides packed full of full internationals, world-class superstars.
"If you're not going to enjoy playing rugby in that kind of environment, you shouldn't be around."
"We're not suddenly a great side if we manage to win and we're not a bad side if we lose, but for the club, the supporters and the players, this is where you want to be - Toulouse, on a Friday night at a packed Stoop. Could you ask for better?"
"Yes, we've won a few games but you don't win anything in December, you put yourself in the position to win things in May.
"The guys are very down to earth and know that if we take our eye off the ball we'll come a cropper and suddenly all the good work will come to nothing.
"If anyone in this place thinks they've done anything to date, they're sorely mistaken. But the group, led by Chris Robshaw, will not allow that to happen."