Nevada public health officials have increased testing at the construction site of Allegiant Stadium, which has led to more cases of COVID-19.

There were 15 active cases of coronavirus among workers who have been there, according to the company in charge of the project.

On May 1, there were 16 positive cases reported at the site, though the reporting makes it unclear whether there’s crossover between those sets of numbers.

Despite delays, the Raiders remain confident the stadium will be ready to open by the end of July.