diff --git a/keystone/tests/unit/contrib/federation/test_utils.py b/keystone/tests/unit/contrib/federation/test_utils.py
index 03e24c6265..7eee36b34c 100644
--- a/keystone/tests/unit/contrib/federation/test_utils.py
+++ b/keystone/tests/unit/contrib/federation/test_utils.py
@@ -676,6 +676,12 @@ class MappingRuleEngineTests(unit.BaseTestCase):
                           mapping_utils.validate_mapping_structure,
                           mapping)
 
+    def test_mapping_validation_with_bad_local_type_user_in_assertion(self):
+        mapping = mapping_fixtures.MAPPING_BAD_LOCAL_TYPE_USER_IN_ASSERTION
+        self.assertRaises(exception.ValidationError,
+                          mapping_utils.validate_mapping_structure,
+                          mapping)
+
     def test_mapping_validation_no_local(self):
         mapping = mapping_fixtures.MAPPING_MISSING_LOCAL
         self.assertRaises(exception.ValidationError,
diff --git a/keystone/tests/unit/mapping_fixtures.py b/keystone/tests/unit/mapping_fixtures.py
index 9afeaea16c..2d77d1867c 100644
--- a/keystone/tests/unit/mapping_fixtures.py
+++ b/keystone/tests/unit/mapping_fixtures.py
@@ -1406,6 +1406,36 @@ MAPPING_BAD_LOCAL_SETUP = {
     ]
 }
 
+MAPPING_BAD_LOCAL_TYPE_USER_IN_ASSERTION = {
+    "rules": [
+        {
+            "local": [
+                {
+                    "user": {
+                        "name": "{0}",
+                        "groups": "{1}"
+                    }
+                }
+            ],
+            "remote": [
+                {
+                    "type": "openstack_user"
+                },
+                {
+                    "type": "openstack_groups"
+
+                },
+                {
+                    "type": "openstack_roles",
+                    "any_one_of": [
+                        "Admin"
+                    ]
+                }
+            ]
+        },
+    ]
+}
+
 MAPPING_GROUPS_WITH_EMAIL = {
     "rules": [
         {