diff --git a/Lib/test/test_csv.py b/Lib/test/test_csv.py
index c718ee1203cbe0..ce5c03659f1979 100644
--- a/Lib/test/test_csv.py
+++ b/Lib/test/test_csv.py
@@ -1103,6 +1103,12 @@ class mydialect(csv.Dialect):
         mydialect.quoting = None
         self.assertRaises(csv.Error, mydialect)
 
+        mydialect.quoting = 42
+        with self.assertRaises(csv.Error) as cm:
+            mydialect()
+        self.assertEqual(str(cm.exception),
+                         'bad "quoting" value')
+
         mydialect.doublequote = True
         mydialect.quoting = csv.QUOTE_ALL
         mydialect.quotechar = '"'