ActiveResourceManagerTest#testWorkerRegistrationTimeoutNotCountingAllocationTime still fails on slow machines

Feb 14 18:50:01 18:50:01.283 [ERROR] Tests run: 18, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.665 s <<< FAILURE! -- in org.apache.flink.runtime.resourcemanager.active.ActiveResourceManagerTest
Feb 14 18:50:01 18:50:01.283 [ERROR] org.apache.flink.runtime.resourcemanager.active.ActiveResourceManagerTest.testWorkerRegistrationTimeoutNotCountingAllocationTime -- Time elapsed: 0.197 s <<< FAILURE!
Feb 14 18:50:01 java.lang.AssertionError: 
Feb 14 18:50:01 
Feb 14 18:50:01 Expecting
Feb 14 18:50:01   <CompletableFuture[Completed: 70e6587e5e4ba9f310031a96bdda2971]>
Feb 14 18:50:01 not to be done.
Feb 14 18:50:01 Be aware that the state of the future in this message might not reflect the one at the time when the assertion was performed as it is evaluated later on
Feb 14 18:50:01 	at org.apache.flink.runtime.resourcemanager.active.ActiveResourceManagerTest$15.lambda$new$3(ActiveResourceManagerTest.java:982)
Feb 14 18:50:01 	at org.apache.flink.runtime.resourcemanager.active.ActiveResourceManagerTest$Context.runTest(ActiveResourceManagerTest.java:1133)
Feb 14 18:50:01 	at org.apache.flink.runtime.resourcemanager.active.ActiveResourceManagerTest$15.<init>(ActiveResourceManagerTest.java:963)
Feb 14 18:50:01 	at org.apache.flink.runtime.resourcemanager.active.ActiveResourceManagerTest.testWorkerRegistrationTimeoutNotCountingAllocationTime(ActiveResourceManagerTest.java:946)
Feb 14 18:50:01 	at java.lang.reflect.Method.invoke(Method.java:498)
Feb 14 18:50:01 	at java.util.concurrent.RecursiveAction.exec(RecursiveAction.java:189)
Feb 14 18:50:01 	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
Feb 14 18:50:01 	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
Feb 14 18:50:01 	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
Feb 14 18:50:01 	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175)