--- a/eric6/E5Gui/E5MessageBox.py	Mon Oct 05 19:51:55 2020 +0200
+++ b/eric6/E5Gui/E5MessageBox.py	Tue Oct 06 17:52:44 2020 +0200
@@ -133,7 +133,7 @@
     messageBox.setText(text)
     messageBox.setStandardButtons(buttons)
     messageBox.setDefaultButton(defaultButton)
-    messageBox.exec_()
+    messageBox.exec()
     clickedButton = messageBox.clickedButton()
     if clickedButton is None:
         return QMessageBox.NoButton