diff --git a/test-requirements.txt b/test-requirements.txt
index 7eb9c2d1..ed21859f 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,7 +8,7 @@ coverage>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 requests-mock>=1.1 # Apache-2.0
 mock>=2.0 # BSD
-mox3>=0.7.0 # Apache-2.0
+mox3!=0.19.0,>=0.7.0 # Apache-2.0
 oslosphinx>=4.7.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0
 python-openstackclient>=3.3.0 # Apache-2.0