diff --git a/tempest/api/identity/v3/test_tokens.py b/tempest/api/identity/v3/test_tokens.py
index d5bed96..b410da6 100644
--- a/tempest/api/identity/v3/test_tokens.py
+++ b/tempest/api/identity/v3/test_tokens.py
@@ -34,6 +34,7 @@
         # it to be 'default'
         token_id, resp = self.non_admin_token.get_token(
             user_id=user_id,
+            username=username,
             user_domain_id=user_domain_id,
             password=password,
             auth_data=True)
@@ -49,9 +50,19 @@
         self.assertGreater(expires_at, now)
 
         subject_id = resp['user']['id']
-        self.assertEqual(subject_id, user_id)
+        if user_id:
+            self.assertEqual(subject_id, user_id)
+        else:
+            # Expect a user ID, but don't know what it will be.
+            self.assertGreaterEqual(len(subject_id), 0,
+                                    'Expected user ID in token.')
 
         subject_name = resp['user']['name']
-        self.assertEqual(subject_name, username)
+        if username:
+            self.assertEqual(subject_name, username)
+        else:
+            # Expect a user name, but don't know what it will be.
+            self.assertGreaterEqual(len(subject_name), 0,
+                                    'Expected user name in token.')
 
         self.assertEqual(resp['methods'][0], 'password')