PartitionAndMerge tests on org.infinispan.partitionhandling key locking failure

All tests fail with a very similar errors:
PessimisticTxPartitionAndMergeDuringPrepareTest.testPrimaryOwnerIsolatedPartitionWithDiscard
java.lang.AssertionError: Expected key 'MagicKey#k1

{1A21/87888FEB/115@PessimisticTxPartitionAndMergeDuringPrepareTest-NodeV-20227}

' to be locked on cache 'Cache 'pes-cache'@PessimisticTxPartitionAndMergeDuringPrepareTest-NodeV-20227'
at org.infinispan.test.AbstractCacheTest.assertLocked(AbstractCacheTest.java:86)
at org.infinispan.partitionhandling.PessimisticTxPartitionAndMergeDuringPrepareTest.checkLocksDuringPartition(PessimisticTxPartitionAndMergeDuringPrepareTest.java:75)
at org.infinispan.partitionhandling.BasePessimisticTxPartitionAndMergeTest.doTest(BasePessimisticTxPartitionAndMergeTest.java:79)
at org.infinispan.partitionhandling.PessimisticTxPartitionAndMergeDuringPrepareTest.testPrimaryOwnerIsolatedPartitionWithDiscard(PessimisticTxPartitionAndMergeDuringPrepareTest.java:41)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

OptimisticTxPartitionAndMergeDuringRollbackTest.testOriginatorIsolatedPartitionWithDiscard
java.lang.AssertionError: Expected key 'MagicKey#k2

{1940/06F6AF9C/15@OptimisticTxPartitionAndMergeDuringRollbackTest-NodeO-20123}

' to be locked on cache 'Cache 'opt-cache'@OptimisticTxPartitionAndMergeDuringRollbackTest-NodeO-20123'
at org.infinispan.test.AbstractCacheTest.assertLocked(AbstractCacheTest.java:86)
at org.infinispan.partitionhandling.OptimisticTxPartitionAndMergeDuringRollbackTest.checkLocksDuringPartition(OptimisticTxPartitionAndMergeDuringRollbackTest.java:84)
at org.infinispan.partitionhandling.BaseOptimisticTxPartitionAndMergeTest.doTest(BaseOptimisticTxPartitionAndMergeTest.java:80)
at org.infinispan.partitionhandling.OptimisticTxPartitionAndMergeDuringRollbackTest.testOriginatorIsolatedPartitionWithDiscard(OptimisticTxPartitionAndMergeDuringRollbackTest.java:33)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)

Additional tests with very similar failures:
PessimisticTxPartitionAndMergeDuringPrepareTest.testPrimaryOwnerIsolatedPartition
PessimisticTxPartitionAndMergeDuringRollbackTest.testOriginatorIsolatedPartitionWithDiscard
OptimisticTxPartitionAndMergeDuringCommitTest.testOriginatorIsolatedPartition
OptimisticTxPartitionAndMergeDuringCommitTest.testOriginatorIsolatedPartitionWithDiscard