diff --git a/tcp_tests/helpers/ext.py b/tcp_tests/helpers/ext.py
new file mode 100644
index 0000000..5771eae
--- /dev/null
+++ b/tcp_tests/helpers/ext.py
@@ -0,0 +1,50 @@
+#    Copyright 2016 Mirantis, Inc.
+#
+#    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 collections
+
+from enum import IntEnum
+
+
+def enum(*values, **kwargs):
+    names = kwargs.get('names')
+    if names:
+        return collections.namedtuple('Enum', names)(*values)
+    return collections.namedtuple('Enum', values)(*values)
+
+UNDERLAY_NODE_ROLE = enum(
+    'salt-master',
+    'salt-minion',
+)
+
+NETWORK_TYPE = enum(
+    'private',
+    'public'
+)
+
+SNAPSHOT = enum(
+    'hardware',
+    'underlay',
+    'tcp_deployed',
+    'os_deployed',
+)
+
+LOG_LEVELS = enum(
+    'INFO',
+    'WARNING',
+    'ERROR',
+    'CRITICAL',
+    'DEBUG',
+    'NOTE'
+)