Daniel Juncadella will take part in "several" Friday practices for Force India after signing up as their reserve driver.
Along with his duties in the DTM series with Mercedes, the 22-year-old will also attend all grand prix weekends with Force India.
Juncadella will get behind the wheel of the VJM07 during some practice sessions, giving the Spaniard valuable track time and experience.
"Joining Sahara Force India is a dream come true," he said.
"It's a fantastic opportunity for me to learn and will hopefully take me a step closer to eventually racing in Formula One.
"To work with the team at the track and in the factory will give me some valuable experience and I will do my best to make a contribution to help the team achieve its goals in 2014."
Team principal Vijay Mallya welcomed the Spaniard, who will also be spending time in the team's simulator.
"Daniel is an exciting prospect and I am delighted to welcome him to Sahara Force India," he said.
"Over the last few years we have always tried to support young, talented drivers and we will continue down this path by giving Daniel the opportunity to drive the VJM07 on Friday mornings at selected races.
"Daniel will also play an important role in our simulator programme at the factory, which remains an increasingly important development tool."