"Pomodoro Clock" fails at 9 out of 29 tests

Hi, My “Pomodoro Clock” app fails at 9 out of 29 tests. Here is the link of the app. Any hints or suggestions will be highly appreciated.
Thanks in advance.

Your clock never reaches 0 seconds. It goes from 1 second to counting the break time which is when the alarm sounds. your clock digits need to reach 00:00. It’s an off by one error.

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Thanks for the feedback. Now it passes all the tests.