diff --git a/nova/api/openstack/auth.py b/nova/api/openstack/auth.py
index acd0338cd7d3..bbaf74d20de0 100644
--- a/nova/api/openstack/auth.py
+++ b/nova/api/openstack/auth.py
@@ -74,7 +74,7 @@ class NoAuthMiddleware(NoAuthMiddlewareBase):
         return self.base_call(req, True, always_admin=False)
 
 
-class NoAuthMiddlewareV2_17(NoAuthMiddlewareBase):
+class NoAuthMiddlewareV2_18(NoAuthMiddlewareBase):
     """Return a fake token if one isn't specified.
 
     This provides a version of the middleware which does not add
diff --git a/nova/tests/functional/api_paste_fixture.py b/nova/tests/functional/api_paste_fixture.py
index 5dfa4848a2e7..3dd4d16061e3 100644
--- a/nova/tests/functional/api_paste_fixture.py
+++ b/nova/tests/functional/api_paste_fixture.py
@@ -63,5 +63,5 @@ class ApiPasteNoProjectId(ApiPasteV21Fixture):
             "paste.filter_factory = nova.api.openstack.auth:"
             "NoAuthMiddleware.factory",
             "paste.filter_factory = nova.api.openstack.auth:"
-            "NoAuthMiddlewareV2_17.factory")
+            "NoAuthMiddlewareV2_18.factory")
         target_file.write(line)
diff --git a/nova/tests/functional/api_sample_tests/api_sample_base.py b/nova/tests/functional/api_sample_tests/api_sample_base.py
index 92c6e2c597d6..d70a8ebbd9f5 100644
--- a/nova/tests/functional/api_sample_tests/api_sample_base.py
+++ b/nova/tests/functional/api_sample_tests/api_sample_base.py
@@ -84,7 +84,7 @@ class ApiSampleTestBaseV21(testscenarios.WithScenarios,
             '_legacy_v2_code': True,
             '_additional_fixtures': [
                 api_paste_fixture.ApiPasteLegacyV2Fixture]}),
-        # test v2.16 code without project id
+        # test v2.18 code without project id
         ('v2_1_noproject_id', {
             'api_major_version': 'v2.1',
             '_project_id': False,
diff --git a/nova/tests/unit/api/openstack/compute/test_auth.py b/nova/tests/unit/api/openstack/compute/test_auth.py
index 928af29450e7..ae5c6552c42f 100644
--- a/nova/tests/unit/api/openstack/compute/test_auth.py
+++ b/nova/tests/unit/api/openstack/compute/test_auth.py
@@ -35,7 +35,7 @@ class TestNoAuthMiddleware(testscenarios.WithScenarios, test.NoDBTestCase):
             'auth_middleware': auth.NoAuthMiddleware}),
         ('no_project_id', {
             'expected_url': 'http://localhost/v2.1',
-            'auth_middleware': auth.NoAuthMiddlewareV2_17}),
+            'auth_middleware': auth.NoAuthMiddlewareV2_18}),
     ]
 
     def setUp(self):
diff --git a/releasenotes/notes/optional_project_id-6aebf1cb394d498f.yaml b/releasenotes/notes/optional_project_id-6aebf1cb394d498f.yaml
index 6bce851bb28e..94fb1335e556 100644
--- a/releasenotes/notes/optional_project_id-6aebf1cb394d498f.yaml
+++ b/releasenotes/notes/optional_project_id-6aebf1cb394d498f.yaml
@@ -1,7 +1,7 @@
 ---
 features:
 
-  - Provides API 2.17, which makes the use of project_ids in API urls
+  - Provides API 2.18, which makes the use of project_ids in API urls
     optional.
 
 upgrade: