diff --git a/test-requirements.txt b/test-requirements.txt
index 2c12ea9fbf..ea628c4129 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -13,7 +13,7 @@ psycopg2
 python-ironicclient>=0.2.1
 python-subunit>=0.0.18
 testrepository>=0.0.18
-testtools>=0.9.36
+testtools>=0.9.36,!=1.2.0,!=1.4.0
 
 # Doc requirements
 sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3