Tests of the cockpit safety device are ongoing, despite a decision by Formula 1's Strategy Group prior to the German Grand Prix for its introduction to be delayed until 2018.

Amid a push by the FIA to get all teams to test it at least once over the remainder of this season, Hulkenberg will join Mercedes' Rosberg in running the device at Spa-Francorchamps for an installation lap on Friday.

A test at the Belgian GP venue was deemed as quite important by the FIA because of the undulating circuit, which would expose any major visibility problems with the Halo.

One of the issues that has been highlighted as a potential difficulty is how easy it would be for drivers to maintain their view of the track through the sweeping Eau Rouge corner.