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ERROR: test_40_cache (test_20_LVM.UdisksLVMTest)
Basic LVM cache test
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Traceback (most recent call last):
  File "/root/rpmbuild/BUILD/udisks-2.9.4/src/tests/dbus-tests/test_20_LVM.py", line 333, in test_40_cache
    lv.CacheAttach('udisks_test_cache_lv', self.no_options, dbus_interface=self.iface_prefix + '.LogicalVolume')
  File "/usr/lib64/python3.9/site-packages/dbus/proxies.py", line 72, in __call__
    return self._proxy_method(*args, **keywords)
  File "/usr/lib64/python3.9/site-packages/dbus/proxies.py", line 141, in __call__
    return self._connection.call_blocking(self._named_service,
  File "/root/rpmbuild/BUILD/udisks-2.9.4/src/tests/dbus-tests/udiskstestcase.py", line 42, in call_long
    return call(*args, **kwargs)
  File "/usr/lib64/python3.9/site-packages/dbus/connection.py", line 652, in call_blocking
    reply_message = self.send_message_with_reply_and_block(
dbus.exceptions.DBusException: org.freedesktop.UDisks2.Error.Failed: Error converting volume: Process reported exit code 5:   WARNING: Converting udisks_test_cache_vg/udisks_test_cache_lv to cache pool's data volume with metadata wiping.
  THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)
  Volume group "udisks_test_cache_vg" has insufficient free space (0 extents): 2 required.
  Failed to set up spare metadata LV for pool.
  LV udisks_test_cache_vg/udisks_test_cache_lv could not be converted to a cache pool.