diff --git a/src/Mod/Part/TestPartGui.py b/src/Mod/Part/TestPartGui.py
index dc207cc831..3efaedfd54 100644
--- a/src/Mod/Part/TestPartGui.py
+++ b/src/Mod/Part/TestPartGui.py
@@ -96,7 +96,7 @@ class SectionCutTestCases(unittest.TestCase):
         dw = findDockWidget("Section Cutting")
         if dw:
             box = dw.findChild(QtWidgets.QDialogButtonBox)
-            button = box.button(box.Close)
+            button = box.button(QtWidgets.QDialogButtonBox.Close)
             button.click()
         else:
             print ("No Section Cutting panel found")