Pole position means that De Vries extends his championship lead from Nicholas Latifi, adding four more points to his total to bring it to 196 points.
Callum Ilott was unable to compete in the session, as his car came to a halt on the pit straight in the first few minutes. This compromised the first attempts of almost all drivers, as the first red flag of the session was brought out.
The Japanese driver looked to be the closest challenger to De Vries, but a mistake in the final chicane meant that he finished half a second down the road.
Closest challenger to De Vries in the championship battle, Nicholas Latifi lost out due to the red flag brought out in the closing stages of the session. The Canadian will hope for a chaotic race, as he starts from eleventh on the grid.
The stoppage was caused by a spin from Sean Gelael, who will start from sixteenth tomorrow.
Bahrain International Circuit - Winter testing