diff --git a/test-requirements.txt b/test-requirements.txt
index 97d223b..f2b2a57 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -9,6 +9,7 @@ ddt>=1.2.1 # MIT
 oslotest>=3.2.0 # Apache-2.0
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.4.0 # MIT
+tooz[etcd3gw]>=2.8.0 # Apache-2.0
 stestr>=2.2.0 # Apache-2.0
 #
 # These are included to constrain the range of possible versions