diff --git a/src/calibre/gui2/tweak_book/check.py b/src/calibre/gui2/tweak_book/check.py
index aa6bf86476..f843390343 100644
--- a/src/calibre/gui2/tweak_book/check.py
+++ b/src/calibre/gui2/tweak_book/check.py
@@ -83,6 +83,7 @@ class Check(QSplitter):
 
     def clear_at_startup(self):
         self.clear_help(_('Check has not been run'))
+        self.items.clear()
 
     def context_menu(self, pos):
         m = QMenu()