The days of a full week of remote work are over for many Apple employees.

The company is now threatening action against staff who aren’t attending work in office at least three times a week.

For now, employees who don’t meet the attendance requirements will receive escalating warnings.

Platformer’s Zoe Schiffer tweeted on Wednesday, “Apple is tracking employees attendance (via badge records) and will give employees escalating warnings if they don’t come in 3x per week. At Apple, some orgs are saying failure to comply could result in termination, but that doesn’t appear to be a company-wide policy.”

Last summer, Apple required all corporate employees to work in the office on at least three selected days starting September 5.

Those days are to include, Tuesday, Thursday and a third regular day selected by team leaders.

In the past, CEO Tim Cook described remote work as “the mother of all experiments.” He said it wasn’t necessarily a bad way of working, but the company has been putting pressure on workers to return to the office nonetheless.