diff --git a/test-requirements.txt b/test-requirements.txt
index 658aabab..05ba285a 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
-Babel>=2.3.4 # BSD
+Babel!=2.4.0,>=2.3.4 # BSD
 coverage>=4.0 # Apache-2.0
 mock>=2.0 # BSD
 mox3!=0.19.0,>=0.7.0 # Apache-2.0