Williams chief Pat Symonds is hopeful that the outfit can translate its form from testing into pace at this weekend's Spanish Grand Prix.
All eight days of pre-season testing took place at the Circuit de Barcelona-Catalunya, with Williams displaying encouraging pace earlier in the year.
Williams has yet to finish on the podium in 2016 and occupies fourth in the Constructors' championship, but Symonds is hopeful of an upturn in form this weekend.
"It is a circuit that is very reactive to climatic conditions, even over the course of a day, therefore the car characteristics we saw in the temperatures of February and March, may not necessarily be indicative of what we will see in May," he said.
"In general, we were happy with the car performance during testing, and hope we can repeat that level of competitiveness, or better, when it matters during the race weekend."
Felipe Massa is optimistic that Williams can edge into contention for the podium positions.
"If the car works well here, it will work well on most of the tracks," he explained.
"I’m looking forward to having a good race there and hope that we can keep improving race by race, and keep scoring points.
"To be able to fight for a podium would be great. We know it won’t be easy but we will try everything we can."