London Welsh coach Lyn Jones says Saturday's trip to Leicester will determine how much they've improved since the start of the season.
The Exiles faced Leicester in their Aviva Premiership opener in September, with the Tigers easing to a 38-15 victory.
However, Welsh have since held their own in their debut season in the top flight and are currently 10 points clear of bottom club Sale.
Jones believes his side learnt a lot in the defeat to Leicester but he is expecting a stiff test at Welford Road, despite the hosts being minus their international contingent.
"We're keen to see how much we've improved since we played Leicester in September; that game was a line in the sand for us," said Jones.
"It was a tough day for us but we've come on a little bit since then and we're keen to see exactly just how far we've improved.
"Leicester and all of the teams in the top half of the table prepare for this period of the season, when the national sides are at full complement with members of their squad, so we don't expect any weakness in the Leicester side we play on Saturday.
"We've improved certain aspects of our game and we're looking to carry those forward against Leicester."