McLaren's engine supplier Honda will be bringing updates to boost performance during the Spanish Grand Prix this weekend.
Honda has denied, however, that it has used any of its allocated tokens for the updates.
The Japanese manufacturer was given nine tokens it can use throughout the season to develop its power unit.
After the first four races of 2015, Honda is starting to ramp up its efforts, and will bring an updated engine to the first European race in Barcelona.
Honda boss Yasuhisa Arai is confident the updates will show the company continues to makes progress after a difficult start to the season.
"The short break before the Spanish GP has been good for Honda, to calmly reflect on what has happened in the first four races, to analyse what we have done well or not so well, and to make preparations ahead of the European races," said Arai.
"We hope that Spain will see another incremental step forward for Honda, in which we've prepared updates on the power unit to help with driveability and reliability.
"And like us, McLaren has had a productive two weeks and will be bringing more updates to test at the track and we'll see how the car will run together as one.
"We're confident that every step we take together as a team is in the right direction, and hopefully this weekend will once again prove our continuing progress."
McLaren is set to score a point this year, with Fernando Alonso's 11th place finish in Bahrain as its best result so far.