diff --git a/tcp_tests/helpers/ext.py b/tcp_tests/helpers/ext.py
index 98853f5..e525eea 100644
--- a/tcp_tests/helpers/ext.py
+++ b/tcp_tests/helpers/ext.py
@@ -23,6 +23,7 @@
         return collections.namedtuple('Enum', names)(*values)
     return collections.namedtuple('Enum', values)(*values)
 
+
 UNDERLAY_NODE_ROLES = enum(
     'salt_master',
     'salt_minion',
@@ -32,11 +33,13 @@
     'decapod_all',
 )
 
+
 NETWORK_TYPE = enum(
     'private',
     'admin'
 )
 
+
 SNAPSHOT = enum(
     'hardware',
     'underlay',
@@ -51,6 +54,7 @@
     'decapod_deployed',
 )
 
+
 LOG_LEVELS = enum(
     'INFO',
     'WARNING',