diff --git a/test-requirements.txt b/test-requirements.txt
index 6f38df39f..14952423e 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,6 +5,7 @@
 hacking<0.12,>=0.10.2 # Apache-2.0
 
 coverage>=4.0 # Apache-2.0
+ddt>=1.0.1 # MIT
 docutils>=0.11 # OSI-Approved Open Source, Public Domain
 mock>=2.0 # BSD
 python-subunit>=0.0.18 # Apache-2.0/BSD