a phenomenon appeared with random test failing. The root-cause of this was tracked to be on the use of Kiwi:

[[expectFutureValue(theValue(finishedFlag)) shouldEventually] beYes];

which has default aggressive timeout of 1 sec. Occasionally some async methods may take some more time to run, which makes the test case to 'erroneous' fail.

Where it makes senses Kiwi's 'shouldEventuallyBeforeTimingOutAfter(x seconds)' should be used to avoid this.