diff --git a/rally/plugins/openstack/credential.py b/rally/plugins/openstack/credential.py
index 79c4990f..7ebf0da5 100644
--- a/rally/plugins/openstack/credential.py
+++ b/rally/plugins/openstack/credential.py
@@ -15,14 +15,12 @@
 
 from rally.common import logging
 from rally import consts
-from rally.deployment import credential
 from rally.plugins.openstack import osclients
 
 LOG = logging.getLogger(__file__)
 
 
-@credential.configure("openstack")
-class OpenStackCredential(credential.Credential):
+class OpenStackCredential(object):
     """Credential for OpenStack."""
 
     def __init__(self, auth_url, username, password, tenant_name=None,
diff --git a/rally/plugins/openstack/platforms/existing.py b/rally/plugins/openstack/platforms/existing.py
index 6f0fa7bc..123a11bb 100644
--- a/rally/plugins/openstack/platforms/existing.py
+++ b/rally/plugins/openstack/platforms/existing.py
@@ -173,3 +173,6 @@ class OpenStack(platform.Platform):
                 "services": osclients.Clients(active_user).list_services()
             }
         }
+
+    def _get_validation_context(self):
+        return {"users@openstack": {}}
diff --git a/tests/unit/plugins/openstack/test_credential.py b/tests/unit/plugins/openstack/test_credential.py
index b6bdc51c..c69f6c82 100644
--- a/tests/unit/plugins/openstack/test_credential.py
+++ b/tests/unit/plugins/openstack/test_credential.py
@@ -16,7 +16,7 @@
 import mock
 
 from rally import consts
-from rally.deployment import credential
+from rally.plugins.openstack import credential
 from tests.unit import test
 
 
@@ -24,8 +24,7 @@ class OpenStackCredentialTestCase(test.TestCase):
 
     def setUp(self):
         super(OpenStackCredentialTestCase, self).setUp()
-        cred_cls = credential.get("openstack")
-        self.credential = cred_cls(
+        self.credential = credential.OpenStackCredential(
             "foo_url", "foo_user", "foo_password",
             tenant_name="foo_tenant",
             permission=consts.EndpointPermission.ADMIN)