diff --git a/beets/plugins.py b/beets/plugins.py
index eaaf9e9f7..2ee5f88f2 100755
--- a/beets/plugins.py
+++ b/beets/plugins.py
@@ -144,7 +144,7 @@ class BeetsPlugin(object):
 
             >>> @MyPlugin.listen("imported")
             >>> def importListener(**kwargs):
-            >>>     pass
+            ...     pass
         """
         def helper(func):
             if cls.listeners is None:
diff --git a/test/test_plugins.py b/test/test_plugins.py
new file mode 100644
index 000000000..a7590432f
--- /dev/null
+++ b/test/test_plugins.py
@@ -0,0 +1,68 @@
+# This file is part of beets.
+# Copyright 2014, Thomas Scholtes.
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+
+from mock import patch
+from _common import unittest
+from helper import TestHelper
+
+from beets import plugins
+from beets.library import Item
+from beets.dbcore import types
+
+
+class PluginTest(unittest.TestCase, TestHelper):
+
+    def setUp(self):
+        # FIXME the mocking code is horrific, but this is the lowest and
+        # earliest level of the plugin mechanism we can hook into.
+        self._plugin_loader_patch = patch('beets.plugins.load_plugins')
+        self._plugin_classes = set()
+        load_plugins = self._plugin_loader_patch.start()
+
+        def myload(names=()):
+            plugins._classes.update(self._plugin_classes)
+        load_plugins.side_effect = myload
+        self.setup_beets()
+
+    def tearDown(self):
+        self._plugin_loader_patch.stop()
+        self.unload_plugins()
+        self.teardown_beets()
+
+    def test_flex_field_type(self):
+        class RatingPlugin(plugins.BeetsPlugin):
+            item_types = {'rating': types.Float()}
+
+        self.register_plugin(RatingPlugin)
+        self.config['plugins'] = 'rating'
+
+        item = Item(path='apath', artist='aaa')
+        item.add(self.lib)
+
+        # Do not match unset values
+        out = self.run_with_output('ls', 'rating:1..3')
+        self.assertNotIn('aaa', out)
+
+        self.run_command('modify', 'rating=2', '--yes')
+
+        # Match in range
+        out = self.run_with_output('ls', 'rating:1..3')
+        self.assertIn('aaa', out)
+
+        # Don't match out of range
+        out = self.run_with_output('ls', 'rating:3..5')
+        self.assertNotIn('aaa', out)
+
+    def register_plugin(self, plugin_class):
+        self._plugin_classes.add(plugin_class)