According to The Athletic, the Blues revamped the visitors' changing room ahead of the 2-0 victory over Tottenham on Sunday.
This came after Liverpool and Brighton complained to the Premier League with fears that COVID-19 could be spread more easily in the facilities offered by the west London club.
It's understood that Graham Potter was disgruntled by the size of the away dressing room at Stamford Bridge after his side played out a 1-1 draw in west London in December.
Liverpool also aired their concerns after their trip to Stamford Bridge on January, which ended in a 2-2 draw.
Pep Lijnders, Jurgen Klopp's assistant, took charge of the team in the German's absence, but tested positive three days after the match.
The report suggests the Blues have expanded the size of the away dressing room by knocking through into the press room, making the media area smaller and giving opposition teams more space.
Meanwhile, the number of positive coronavirus tests in the Premier League has fallen to its lowest total since the start of December.
There were 16 new positive cases recorded in the latest round of testing from January 17 to 23, with 6,221 Covid-19 tests administered on players and club staff.
Only two positive Covid-19 tests were actually recorded between January 21 and 23 from the 2,090 tests conducted.
A Premier League statement read: "This is the fourth week in a row the number of positive results has decreased and the lowest number of positives in a week since December 5.
"The safety of everyone remains a priority and the Premier League is taking all precautionary steps in response to the impact of the Omicron variant.
"The League has reverted to its emergency measures and has increased testing of players and club staff."