Pomodoro Clock working fine but failing timer tests

Tell us what’s happening:
Hi all, at the moment my Pomodoro Clock seems to work fine compared to the given example, but it is failing all the tests related to the timer, I wonder if this is because I’m using JS setInterval() function, thank you for reading and hopefully you can help me!

Your code so far

Link to codepen: https://codepen.io/saro928/pen/NWqvKME?editors=0010

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36.

Challenge: Build a Pomodoro Clock

Link to the challenge: