Raspentino, 23, is a free agent after leaving Ligue 2 side Nantes following a debut season where he scored seven goals in 28 appearances.
"We've agreed a deal in principle with the player," the club said on their website. "He's been out of contract following the past season with Nantes, and as a local lad from Marignane, he will get to know the team at our training camp in Switzerland."
A pacy forward who has spend most of his career in the amateur divisions, Raspentino is regarded as a raw talent for the future who can make an impact from the bench.
He is eligible to play for both France and Algeria.