diff --git a/castellan/tests/functional/key_manager/test_barbican_key_manager.py b/castellan/tests/functional/key_manager/test_barbican_key_manager.py
index fb391d7d..9a04c240 100644
--- a/castellan/tests/functional/key_manager/test_barbican_key_manager.py
+++ b/castellan/tests/functional/key_manager/test_barbican_key_manager.py
@@ -18,7 +18,9 @@ Functional test cases for the Barbican key manager.
 
 Note: This requires local running instances of Barbican and Keystone.
 """
+
 import abc
+import unittest
 
 from keystoneauth1 import identity
 from keystoneauth1 import session
@@ -26,7 +28,6 @@ from oslo_config import cfg
 from oslo_context import context
 from oslo_utils import uuidutils
 from oslotest import base
-from testtools import testcase
 
 from castellan.common.credentials import keystone_password
 from castellan.common.credentials import keystone_token
@@ -59,7 +60,7 @@ class BarbicanKeyManagerTestCase(test_key_manager.KeyManagerTestCase):
         except Exception as e:
             # When we run functional-vault target, This test class needs
             # to be skipped as barbican is not running
-            raise testcase.TestSkipped(str(e))
+            raise unittest.SkipTest(str(e))
 
     def tearDown(self):
         super(BarbicanKeyManagerTestCase, self).tearDown()
diff --git a/castellan/tests/functional/key_manager/test_vault_key_manager.py b/castellan/tests/functional/key_manager/test_vault_key_manager.py
index 180189e0..f8546fbd 100644
--- a/castellan/tests/functional/key_manager/test_vault_key_manager.py
+++ b/castellan/tests/functional/key_manager/test_vault_key_manager.py
@@ -15,14 +15,15 @@ Functional test cases for the Vault key manager.
 
 Note: This requires local running instance of Vault.
 """
+
 import os
+import unittest
 import uuid
 
 from oslo_config import cfg
 from oslo_utils import uuidutils
 from oslotest import base
 import requests
-from testtools import testcase
 
 from castellan.common import exception
 from castellan.key_manager import vault_key_manager
@@ -39,7 +40,7 @@ class VaultKeyManagerTestCase(test_key_manager.KeyManagerTestCase,
 
         if ('VAULT_TEST_URL' not in os.environ or
                 'VAULT_TEST_ROOT_TOKEN' not in os.environ):
-            raise testcase.TestSkipped('Missing Vault setup information')
+            raise unittest.SkipTest('Missing Vault setup information')
 
         key_mgr._root_token_id = os.environ['VAULT_TEST_ROOT_TOKEN']
         key_mgr._vault_url = os.environ['VAULT_TEST_URL']
@@ -90,7 +91,7 @@ class VaultKeyManagerAppRoleTestCase(VaultKeyManagerTestCase):
 
         if ('VAULT_TEST_URL' not in os.environ or
                 'VAULT_TEST_ROOT_TOKEN' not in os.environ):
-            raise testcase.TestSkipped('Missing Vault setup information')
+            raise unittest.SkipTest('Missing Vault setup information')
 
         self.root_token_id = os.environ['VAULT_TEST_ROOT_TOKEN']
         self.vault_url = os.environ['VAULT_TEST_URL']