diff --git a/test-requirements.txt b/test-requirements.txt
index 8278d76ac8..4d80ef517f 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -25,7 +25,7 @@ wrapt>=1.7.0 # BSD License
 # Install these to generate sphinx autodocs
 aodhclient>=0.7.0 # Apache-2.0
 gnocchiclient>=2.7.0 # Apache-2.0
-python-barbicanclient>=4.0.0 # Apache-2.0
+python-barbicanclient!=4.5.0,>=4.0.0 # Apache-2.0
 python-congressclient<2000,>=1.3.0 # Apache-2.0
 python-designateclient>=1.5.0 # Apache-2.0
 python-heatclient>=1.6.1 # Apache-2.0