What does the error message "1 timer(s) still in the queue" indicate in an Angular/Karma unit test?

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This error message indicates that there is a timer function that has not been executed yet in the unit test. This might mean that the test did not wait long enough for a particular action to finish before moving to the next step, or there might be an issue with the asynchronous code in the test. The timer(s) in the queue need to be cleared before the test is completed.