diff --git a/Lib/lib-tk/Tkinter.py b/Lib/lib-tk/Tkinter.py
index 529a3e4..6ad0cf1 100644
--- a/Lib/lib-tk/Tkinter.py
+++ b/Lib/lib-tk/Tkinter.py
@@ -3411,7 +3411,7 @@
         bounding box may refer to a region outside the
         visible area of the window.
         """
-        return self.tk.call(self._w, 'bbox', index)
+        return self._getints(self.tk.call(self._w, 'bbox', index)) or None
 
     def delete(self, first, last=None):
         """Delete one or more elements of the spinbox.
diff --git a/Lib/lib-tk/test/test_tkinter/test_widgets.py b/Lib/lib-tk/test/test_tkinter/test_widgets.py
index 1380a73..cfbc0b3 100644
--- a/Lib/lib-tk/test/test_tkinter/test_widgets.py
+++ b/Lib/lib-tk/test/test_tkinter/test_widgets.py
@@ -454,6 +454,18 @@
         widget = self.create()
         self.checkBooleanParam(widget, 'wrap')
 
+    def test_bbox(self):
+        widget = self.create()
+        bbox = widget.bbox(0)
+        self.assertEqual(len(bbox), 4)
+        for item in bbox:
+            self.assertIsInstance(item, int)
+
+        self.assertRaises(Tkinter.TclError, widget.bbox, 'noindex')
+        self.assertRaises(Tkinter.TclError, widget.bbox, None)
+        self.assertRaises(TypeError, widget.bbox)
+        self.assertRaises(TypeError, widget.bbox, 0, 1)
+
 
 @add_standard_options(StandardOptionsTests)
 class TextTest(AbstractWidgetTest, unittest.TestCase):