diff --git a/.stestr.blacklist.functional b/.stestr.blacklist.functional
index 5e1b145c9..db3bd12f9 100644
--- a/.stestr.blacklist.functional
+++ b/.stestr.blacklist.functional
@@ -25,3 +25,4 @@ otcextensions.tests.functional.sdk.sfsturbo*
 otcextensions.tests.functional.osclient.vpc.v1.test_peering*
 otcextensions.tests.functional.sdk.waf.v1.test_domain*
 otcextensions.tests.functional.sdk.tms*
+otcextensions.tests.functional.osclient.kms*
diff --git a/otcextensions/sdk/kms/v1/key.py b/otcextensions/sdk/kms/v1/key.py
index 3b8c33ae0..bc2cffea5 100644
--- a/otcextensions/sdk/kms/v1/key.py
+++ b/otcextensions/sdk/kms/v1/key.py
@@ -57,7 +57,13 @@ class Key(_base.Resource):
     error_msg = resource.Body('error_msg')
 
     def fetch(self, session, requires_id=None,
-              base_path=None, error_message=None):
+              base_path=None, error_message=None,
+              skip_cache=False,
+              *,
+              resource_response_key=None,
+              microversion=None,
+              **params,
+              ):
         if not self.allow_fetch:
             raise exceptions.MethodNotSupported(self, "fetch")
         url = self.get_path
diff --git a/otcextensions/tests/functional/osclient/kms/__init__.py b/otcextensions/tests/functional/osclient/kms/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/otcextensions/tests/functional/osclient/kms/v1/test_cmk.py b/otcextensions/tests/functional/osclient/kms/v1/test_cmk.py
new file mode 100644
index 000000000..718ccd45a
--- /dev/null
+++ b/otcextensions/tests/functional/osclient/kms/v1/test_cmk.py
@@ -0,0 +1,27 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+import json
+
+from openstackclient.tests.functional import base
+
+
+class TestCmk(base.TestCase):
+    """Functional tests for KMS CMK. """
+
+    def test_cmk_list(self):
+        json_output = json.loads(self.openstack(
+            'kms cmk list -f json',
+            cloud='functest_cloud')
+        )
+        self.assertGreater(len(json_output), 0)
+        name = json_output[0]['key_alias']
+        self.openstack(f'kms cmk show {name}', cloud='terraform')