Drive: testRegisteredSyncRootChildChange randomly failing

19:08:35 Running org.nuxeo.drive.hierarchy.permission.TestPermissionHierarchyFileSystemChanges
19:08:35 StorageConfiguration: Deploying JDBC using DatabaseH2
19:08:35 StorageConfiguration: Deploying a VCS repository
19:08:35 Tests run: 3, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 1.117 sec <<< FAILURE! - in org.nuxeo.drive.hierarchy.permission.TestPermissionHierarchyFileSystemChanges
19:08:35 testRegisteredSyncRootChildChange(org.nuxeo.drive.hierarchy.permission.TestPermissionHierarchyFileSystemChanges)  Time elapsed: 0.228 sec  <<< FAILURE!
19:08:35 java.lang.AssertionError: expected:<1> but was:<0>
19:08:35 	at org.junit.Assert.fail(Assert.java:88)
19:08:35 	at org.junit.Assert.failNotEquals(Assert.java:743)
19:08:35 	at org.junit.Assert.assertEquals(Assert.java:118)
19:08:35 	at org.junit.Assert.assertEquals(Assert.java:555)
19:08:35 	at org.junit.Assert.assertEquals(Assert.java:542)
19:08:35 	at org.nuxeo.drive.hierarchy.permission.TestPermissionHierarchyFileSystemChanges.testRegisteredSyncRootChildChange(TestPermissionHierarchyFileSystemChanges.java:268)