diff --git a/test-requirements.txt b/test-requirements.txt
index 2da1163..6197985 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -14,7 +14,7 @@ coverage>=4.0 # Apache-2.0
 django-nose>=1.4.4 # BSD
 flake8<2.6.0,>=2.5.4 # MIT
 mock>=2.0 # BSD
-mox3>=0.7.0 # Apache-2.0
+mox3!=0.19.0,>=0.7.0 # Apache-2.0
 nose # LGPL
 nose-exclude # LGPL
 nosehtmloutput>=0.0.3 # Apache-2.0