The Reds' Head Coach wants to take the lessons from midweek into Saturday's trip to Derby County in the Sky Bet Championship.
Heading into the weekend, the Reds boss first gave an update on the health of a number of his players.
It was positive news for two from Ismaël's squad whilst others will need a little longer.
Valérien told us: “We have some tests for Cauley Woodrow and Callum Brittain and if those two come through okay, then they will hopefully be available for our last session tomorrow.
“If that goes well, they’d be in contention at the weekend.
“I’m optimistic about it. We have to be careful and sure about them, but I think they’re looking good for Saturday. I have a good feeling about the guys.
“But Jordan (Williams) and Romal (Palmer) will definitely be missing again. We’re looking at them returning after the international break.”
After opening up his Reds tenure with back-to-back victories, it was back down to Earth with a bump in midweek.
A 3-0 defeat in Wales against Cardiff City opened the new man's eyes a little as he attempts to make sure that kind of display remains a one-off.
“The intensity wasn’t there.” Explained Ismaël.
“We lost a lot of balls, the front was not good enough. Against such an opponent, who play in that way, our performance wasn’t anything close to what it needed to be.
“But this is a process for everyone. I have taken a lot from the game. We’re always learning and I had confirmation from Cardiff about a few things, decisions, that we will take into future games against these opponents.
“Now we look forward to the game on Saturday.”
Next up for Barnsley is the much shorter road-trip, down the M1 to Derby.
But for Sheffield Wednesday's now-reduced points deduction, the Rams would be rooted to the bottom of the Championship table.
They've started the campaign in poor form and are yet to win on home soil this season.
The boss expects a challenge regardless but feels a confident and brave display will see the Reds head into the international break with positivity.
“I want to see more courage from my team.” Valérien said.
“We know that Derby are struggling at the moment, but they have a roster of quality players that should be in the top five in the division.
“It’s a bad moment for them, but this is a long season.
“I want us to go there on Saturday and make it unpleasant for Derby. We have to transfer our plan into action, to go there and win, and then we move into the break in good confidence.”