diff --git a/tests/test_web.py b/tests/test_web.py
index 0766b41..02310ba 100644
--- a/tests/test_web.py
+++ b/tests/test_web.py
@@ -110,3 +110,5 @@ class TestValidators(flask_testing.TestCase):
             '/', data=json.dumps({'foo': 'bar'}), content_type='application/json').data)
         self.assertEqual(b"'abc' is not of type 'number'", self.client.post(
             '/', data=json.dumps({'name': 'bar', 'age': 'abc'}), content_type='application/json').data)
+        self.assertEqual(b'ok', self.client.post(
+            '/', data=json.dumps({'name': 'bar', 'age': 55}), content_type='application/json').data)