Lynn, who is combining his Williams Formula One commitments with a full time GP2 campaign with DAMS, is set to drive on Wednesday with Bottas driving on Tuesday.
It will be his first run in a contemporary F1 car since the in-season test in Spain earlier this season when he shared the car with Felipe Massa.
Mercedes: Esteban Ocon
Red Bull: Pierre Gasly
Williams: Valtteri Bottas and Alex Lynn
Toro Rosso: Carlos Sainz and Sergio Sette Camara
Manor: Rio Haryanto and Jordan King
Haas: Santino Ferrucci
Pirelli: Pascal Wehrlein (Driving a 2014 Mercedes F1 W05 Hybrid)
Bahrain International Circuit - Winter testing