Van der Mark suffered a fractured leg in a mountain bike accident earlier this month, which is likely to result in the Dutch rider missing the opening round of the new season at Aragon on April 8-10.
Scott Redding was left to represent the factory BMW team alone in last week's Misano test, but the German marque has now recruited three-time IDM title-winner Mikhalchik for this week's two-day test at Barcelona and the Dorna-supported official test at Aragon that precedes the curtain-raiser.
