diff --git a/tests/integration/saml2/test_01_sso.py b/tests/integration/saml2/test_01_sso.py
index 8df84662..6efe8a56 100644
--- a/tests/integration/saml2/test_01_sso.py
+++ b/tests/integration/saml2/test_01_sso.py
@@ -40,3 +40,14 @@ url http://localhost:10002
 find 'Logged in'
 ''')
 
+def test_sso_ispassive():
+    twill.commands.reset_browser()
+    twill.execute_string('''
+go http://localhost:10002
+fv 1 is_passive true
+submit
+url http://localhost:10002
+find 'Unknown authentication failure'
+''')
+
+