diff --git a/test/test_signature.py b/test/test_signature.py
index <HASH>..<HASH> 100644
--- a/test/test_signature.py
+++ b/test/test_signature.py
@@ -239,7 +239,7 @@ cp ${_input} ${_dest}
         env.config['sig_mode'] = 'default'
         Base_Executor(wf).run()
         
-        self.assertLess(time.time() - start, 2)
+        self.assertLess(time.time() - start, 3)
         #
         # change script a little bit
         script = SoS_Script('# comment\n' + text)
Fix another timing issue for Travis CI