Boss Gary Bowyer was pleased with how the players coped with the heat and humidity in Saturday's draw with Bradford City.
The match at the Coral Windows Stadium was played with a decent tempo throughout despite temperatures on the pitch touching 90 degrees.
Rovers were without several first team stars but the manager felt the squad performed well considering, with several staking a claim for a starting position come the big season kick-off against Cardiff City.
"The temperatures were very difficult for both teams, but I thought I thought both teams did well in the searing heat," said the Rovers boss.
"I thought it was a good workout again, it is all about getting the minutes and we've extended the minutes again from Wednesday for the majority of them.
"We had a little bit of a sickness bug go through one or two and one or two were sore so we ended up with six missing.
"What it did do is it presented a chance for us to have a look at the whole squad and for others to put a case forward and I thought some did that and some didn't.
"In this heat we said you've to make a conscious effort to keep the ball and I thought that is what we tried to do.
"Rudy was missing, Browny was missing, so we didn't have that big option up there and we are going to have to learn how to play a different way and I thought they took the challenge on and passed it well at times."
Rovers are back in action this Wednesday night when they take on Bury at the JD Stadium, kick-off 7.45pm.
Tickets are currently on sale from the Roverstore at Ewood, the Oneroverstore in Blackburn town centre and online at www.onerovers.co.uk. Fans can also pay on the night of the game at the turnstiles. Price are £10 Adults, £5 concessions.