--- a/test/session_common.py	Mon Jul 25 16:39:31 2022 -0400
+++ b/test/session_common.py	Mon Jul 25 17:20:20 2022 -0400
@@ -59,3 +59,32 @@
         self.sessions.set('random_key', text='nope')
         self.assertEqual(self.sessions.get('random_key', 'text'), 'nope')
 
+    # overridden in dbm and memory backends
+    def testUpdateTimestamp(self):
+        def get_ts_via_sql(self):
+            sql = '''select %(name)s_time from %(name)ss
+                 where %(name)s_key = '%(session)s';'''% \
+                     {'name': self.sessions.name,
+                      'session': 'random_session'}
+
+            self.sessions.cursor.execute(sql)
+            db_tstamp = self.sessions.cursor.fetchone()
+            return db_tstamp
+
+        # make sure timestamp is older than one minute so update will apply
+        timestamp = time.time() - 62
+        self.sessions.set('random_session', text='hello, world!',
+                          __timestamp=timestamp)
+
+        self.sessions.updateTimestamp('random_session')
+        # this doesn't work as the rdbms backends have a
+        # session_time, otk_time column and the timestamp in the
+        # session marshalled payload isn't updated. The dbm
+        # backend does update the __timestamp value so it works
+        # for dbm.
+        #self.assertNotEqual (self.sessions.get('random_session',
+        #                                       '__timestamp'),
+        #                     timestamp)
+
+        # use 61 to allow a fudge factor
+        self.assertGreater(get_ts_via_sql(self)[0] - timestamp, 61)