diff --git a/oslo_log/_options.py b/oslo_log/_options.py
index 141c0d49..ce47c863 100644
--- a/oslo_log/_options.py
+++ b/oslo_log/_options.py
@@ -167,8 +167,8 @@ log_opts = [
                help='Prefix each line of exception output with this format. '
                     'Used by oslo_log.formatters.ContextFormatter'),
     cfg.StrOpt('logging_user_identity_format',
-               default='%(user)s %(project)s '
-                       '%(domain)s %(user_domain)s %(project_domain)s',
+               default='%(user)s %(project)s %(domain)s %(system_scope)s '
+                       '%(user_domain)s %(project_domain)s',
                help='Defines the format string for %(user_identity)s that '
                     'is used in logging_context_format_string. '
                     'Used by oslo_log.formatters.ContextFormatter'),
diff --git a/oslo_log/tests/unit/test_log.py b/oslo_log/tests/unit/test_log.py
index 2159315b..041d5cfb 100644
--- a/oslo_log/tests/unit/test_log.py
+++ b/oslo_log/tests/unit/test_log.py
@@ -71,6 +71,7 @@ handlers=
 def _fake_context():
     ctxt = context.RequestContext(user_id="myuser",
                                   user_name="myuser",
+                                  system_scope="myscope",
                                   domain="mydomain",
                                   project_id="mytenant",
                                   project_name="mytenant",
@@ -957,9 +958,9 @@ class ContextFormatterTestCase(LogTestBase):
         ctxt.request_id = '99'
         message = 'test'
         self.log.info(message, context=ctxt)
-        expected = ("HAS CONTEXT [%s %s %s %s %s %s]: %s\n" %
+        expected = ("HAS CONTEXT [%s %s %s %s %s %s %s]: %s\n" %
                     (ctxt.request_id, ctxt.user, ctxt.project_id, ctxt.domain,
-                     ctxt.user_domain, ctxt.project_domain,
+                     ctxt.system_scope, ctxt.user_domain, ctxt.project_domain,
                      str(message)))
         self.assertEqual(expected, self.stream.getvalue())
 
@@ -1254,7 +1255,11 @@ class DomainTestCase(LogTestBase):
         super(DomainTestCase, self).setUp()
         self.config(logging_context_format_string="[%(request_id)s]: "
                                                   "%(user_identity)s "
-                                                  "%(message)s")
+                                                  "%(message)s",
+                    logging_user_identity_format="%(user)s %(project)s "
+                                                 "%(user_domain)s "
+                                                 "%(project_domain)s "
+                                                 "%(domain)s")
         self.mylog = log.getLogger()
         self._add_handler_with_cleanup(self.mylog)
         self._set_log_level_with_cleanup(self.mylog, logging.DEBUG)
@@ -1273,7 +1278,8 @@ class DomainTestCase(LogTestBase):
 
     def test_domain_in_log_msg(self):
         ctxt = _fake_context()
-        user_identity = ctxt.get_logging_values()['user_identity']
+        user_identity = (self.CONF.logging_user_identity_format %
+                         ctxt.get_logging_values())
         self.assertIn(ctxt.domain, user_identity)
         self.assertIn(ctxt.project_domain, user_identity)
         self.assertIn(ctxt.user_domain, user_identity)
diff --git a/releasenotes/notes/add-system_scope-to-logging_user_identity_format-0581ce5070740375.yaml b/releasenotes/notes/add-system_scope-to-logging_user_identity_format-0581ce5070740375.yaml
new file mode 100644
index 00000000..dfde314c
--- /dev/null
+++ b/releasenotes/notes/add-system_scope-to-logging_user_identity_format-0581ce5070740375.yaml
@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    Default value of the ``[DEFAULT] logging_user_identity_format`` option has
+    been updated and now includes system scope information by default.
diff --git a/requirements.txt b/requirements.txt
index 04331e45..a5626e8b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 
 pbr>=3.1.1 # Apache-2.0
 oslo.config>=5.2.0 # Apache-2.0
-oslo.context>=2.20.0 # Apache-2.0
+oslo.context>=2.21.0 # Apache-2.0
 oslo.i18n>=3.20.0 # Apache-2.0
 oslo.utils>=3.36.0 # Apache-2.0
 oslo.serialization>=2.25.0 # Apache-2.0