diff --git a/test-requirements.txt b/test-requirements.txt
index b0d5813..8e0ab0a 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -9,6 +9,7 @@ mock>=1.2 # BSD
 oslotest>=1.10.0 # Apache-2.0
 requests-mock>=0.7.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
+testtools>=1.4.0  # MIT
 
 # Files beyond this line are not in Global Requirements list
 # and must be added there.