Nancy boss Patrick Gabriel has warned his players they cannot afford to relax now they are out of the relegation zone.
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The visitors head to Valenciennes on Saturday having taken 13 points from a possible 15 to move a point above the bottom three in Ligue 1.
Their current form is as good as any side in the division, but Gabriel knows there is still plenty of work to do.
"Today, for the first time in a long time, we have our head out of the water but nothing has been accomplished," said Gabriel.
"There is no relief because they are all aware of what is at stake. The fight for survival will go on to the end. I expect to fight until the final day in Brest.
"This trip to Valenciennes is important, but no more or less than the other four games left this season.
"Every weekend, we are told that this is the key. This is false. After Valenciennes, there will still be 12 points left to take."
Valenciennes are six points ahead of Nancy in 12th place, but still not yet out of the woods in a tight bottom half of the table.
Centre-back Lindsay Rose told the club website: "Mathematically, we are not yet safe. We have 40 points, which is a good thing, but to be sure of staying up we must still win a game.
"The (1-0) victory in Reims (last weekend) was good for morale, but we are still concerned with the upcoming matches."