diff --git a/ui/server.py b/ui/server.py
index 29479d9..85063cb 100644
--- a/ui/server.py
+++ b/ui/server.py
@@ -124,6 +124,15 @@ class _TestCases(unittest.TestCase):
 		r = self.requests.put('/store', data=persona.get_identity().encode())
 		self.assertEqual(r.status_code, 201)
 
+		# that an object with a bad signature
+		badsigobj = persona.get_identity().new_version()
+
+		# when stored
+		r = self.requests.put('/store', data=badsigobj.encode())
+
+		# is rejected
+		self.assertEqual(r.status_code, 401)
+
 		# that when stored
 		self.medaserver.store()