diff --git a/tests/unit/completion/test_completer.py b/tests/unit/completion/test_completer.py
index 3a8bf7b3f..bfb1f0718 100644
--- a/tests/unit/completion/test_completer.py
+++ b/tests/unit/completion/test_completer.py
@@ -195,6 +195,9 @@ def test_completion_item_next(completer_obj, cmd, completion_widget_stub,
     (':foo |', 'bar', True, 2, ':foo bar|'),
     (':foo |', 'bar', True, 1, ':foo bar |'),
     (':foo | bar', 'baz', False, 1, ':foo baz| bar'),
+    (':foo |', 'bar baz', True, 1, ":foo 'bar baz' |"),
+    (':foo |', '', True, 1, ":foo '' |"),
+    (':foo |', None, True, 1, ":foo |"),
 ])
 def test_selection_changed(before, newtxt, count, quick_complete, after,
                            completer_obj, cmd, completion_widget_stub,