diff --git a/tests/hwsim/test_ap_hs20.py b/tests/hwsim/test_ap_hs20.py
index 49b9c65d0..102865e4a 100644
--- a/tests/hwsim/test_ap_hs20.py
+++ b/tests/hwsim/test_ap_hs20.py
@@ -403,7 +403,8 @@ def test_ap_hs20_username(dev, apdev):
     id = dev[0].add_cred_values({ 'realm': "example.com",
                                   'username': "hs20-test",
                                   'password': "password",
-                                  'domain': "example.com" })
+                                  'domain': "example.com",
+                                  'update_identifier': "1234" })
     interworking_select(dev[0], bssid, "home", freq="2412")
     interworking_connect(dev[0], bssid, "TTLS")
     check_sp_type(dev[0], "home")
diff --git a/tests/hwsim/wpasupplicant.py b/tests/hwsim/wpasupplicant.py
index 46f233e0a..9dfa037f8 100644
--- a/tests/hwsim/wpasupplicant.py
+++ b/tests/hwsim/wpasupplicant.py
@@ -217,7 +217,7 @@ class WpaSupplicant:
 
         not_quoted = [ "eap", "roaming_consortium",
                        "required_roaming_consortium", "sp_priority",
-                       "max_bss_load" ]
+                       "max_bss_load", "update_identifier" ]
         for field in not_quoted:
             if field in params:
                 self.set_cred(id, field, params[field])