Ghana assistant coach Maxwell Konadu believes Monday's defeat to club side Attram de Visser is a wake-up call ahead of their clash with Burkina Faso on Sunday.
The Team B outfit fell 3-1 to the academy side at the Accra Sports Stadium, five days before playing away to the Stallions in the second and final round of African Nations Championship qualifying.
Ashanti Gold's Shafiu Mumuni got the Black Stars' consolation, with Reginald Thompson (2x) and Godfred Odametey finding target for the underdogs.
“It was a good exercise," Konadu said.
"This is the first time we have been beaten and for me, it serves as a wake-up call, even though we didn’t start with the best of our available players.
“We needed to give other players the opportunity to see what they have got, so we now have a clearer idea of those making the trip [to Burkina Faso].
"It is good to see these players in match situations.
"At their clubs, they're fantastic but when they don the national colours, it is a different situation altogether."
Ghana depart for Burkina Faso on Wednesday for the first leg encounter.
The side are looking to make amends after missing out of the Chan tournament in Rwanda last year.
The next edition comes off in Kenya in 2018.