Pomodoro clock: Tests fail

Test case 10

Pomodoro has paused but time continued elapsing: expected ‘57’ to equal ‘58’
AssertionError: Pomodoro has paused but time continued elapsing: expected ‘57’ to equal ‘58’

Test case 13

Timer has reached zero but didn’t switch to Break time: expected ‘Session’ to not equal ‘Session’
AssertionError: Timer has reached zero but didn’t switch to Break time: expected ‘Session’ to not equal ‘Session’

But it seems working fine. If you have any ideas I would greatly appreciate your feedback.
Demo link:
https://codepen.io/dasith91/full/rNVaVpy