diff --git a/src/calibre/gui2/preferences/template_functions.py b/src/calibre/gui2/preferences/template_functions.py
index a5d0a3b974..59b80a76e8 100644
--- a/src/calibre/gui2/preferences/template_functions.py
+++ b/src/calibre/gui2/preferences/template_functions.py
@@ -505,7 +505,11 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
 
 
 if __name__ == '__main__':
-    from calibre import Application
+    from calibre.gui2 import Application
+    from calibre.gui2.ui import get_gui
+    from calibre.library import db
     app = Application([])
+    app.current_db = db()
+    get_gui.ans = app
     test_widget('Advanced', 'TemplateFunctions')
     del app