Seen a few times in recent builds:

ServiceTest > testManyServicesRunConcurrently FAILED
    org.junit.runners.model.TestTimedOutException: test timed out after 2000 milliseconds
        at java.base@18/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@18/java.util.concurrent.locks.LockSupport.park(LockSupport.java:211)
        at java.base@18/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:715)
        at java.base@18/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1047)
        at java.base@18/java.util.concurrent.CountDownLatch.await(CountDownLatch.java:230)
        at app//test.javafx.concurrent.ServiceTest.testManyServicesRunConcurrently(ServiceTest.java:204)