The Dutch winger has become a forgotten man at the DW Stadium, slipping alarmingly down the pecking order.
The Latics have therefore agreed to let the 26-year-old head off to France in an effort to find a new club.
Valenciennes have confirmed that they will be taking a look at De Ridder, with a place available in their squad for a creative influence.
"He is on trial for at least one week," Valenciennes chairman Francis Decourriere told L'Equipe.
"The injury to Gaetan Bong has also hurt us and left us a little short."