diff --git a/test-requirements.txt b/test-requirements.txt
index 699c4b95aa..a77df98cc6 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -19,4 +19,5 @@ sphinxmark # Apache-2.0
 lxml>=2.3,!=3.7.0  # BSD
 
 # For translations
-Babel>=2.3.4  # BSD
+# Babel 2.4.0 is broken, fixed in 2.4.1
+Babel>=2.3.4,!=2.4.0  # BSD