Running org.xnio.nio.test.FileSystemWatcherTestCase
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 20.025 sec <<< FAILURE! - in org.xnio.nio.test.FileSystemWatcherTestCase
testFileSystemWatcher(org.xnio.nio.test.FileSystemWatcherTestCase) Time elapsed: 20.025 sec <<< FAILURE!
java.lang.AssertionError: null
at org.junit.Assert.fail(Assert.java:86)
at org.junit.Assert.assertTrue(Assert.java:41)
at org.junit.Assert.assertNotNull(Assert.java:621)
at org.junit.Assert.assertNotNull(Assert.java:631)
at org.xnio.nio.test.FileSystemWatcherTestCase.checkResult(FileSystemWatcherTestCase.java:159)
at org.xnio.nio.test.FileSystemWatcherTestCase.testFileSystemWatcher(FileSystemWatcherTestCase.java:121)

This is on OS X if that makes a difference