--- borgbackup-1.4.0/src/borg/testsuite/locking.py.orig
+++ borgbackup-1.4.0/src/borg/testsuite/locking.py
@@ -35,6 +35,7 @@
         time.sleep(timeout * 1.5)
         assert t.timed_out()
 
+    @pytest.mark.skip(reason="fails: https://www.illumos.org/issues/16432")
     def test_notimeout_sleep(self):
         timeout, sleep = None, 0.5
         t = TimeoutTimer(timeout, sleep).start()