diff --git a/test-requirements.txt b/test-requirements.txt
index 519088ae6eb0..993607716efa 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -19,4 +19,4 @@ sphinx>=1.1.2,!=1.2.0,<1.3
 oslosphinx>=2.2.0  # Apache-2.0
 oslotest>=1.1.0  # Apache-2.0
 testrepository>=0.0.18
-testtools>=0.9.34
+testtools>=0.9.34,!=1.4.0