diff --git a/tcp_tests/settings.py b/tcp_tests/settings.py
index 347e8e6..6a4a885 100644
--- a/tcp_tests/settings.py
+++ b/tcp_tests/settings.py
@@ -82,6 +82,7 @@
 TEMPEST_PATTERN = os.environ.get('TEMPEST_PATTERN', 'tempest')
 TEMPEST_TIMEOUT = int(os.environ.get('TEMPEST_TIMEOUT', 60 * 60 * 6))
 TEMPEST_THREADS = int(os.environ.get('TEMPEST_THREADS', 2))
+TEMPEST_EXTRA_ARGS = os.environ.get('TEMPEST_EXTRA_ARGS', '')
 TEMPEST_TARGET = os.environ.get('TEMPEST_TARGET', 'gtw01')
 SALT_VERSION = os.environ.get('SALT_VERSION', '2017.7')