diff --git a/lower-constraints.txt b/lower-constraints.txt
index d9329c5..c4bdc37 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -41,7 +41,6 @@ linecache2==1.0.0
 logilab-common==1.4.1
 MarkupSafe==1.0
 mccabe==0.2.1
-mock==2.0.0
 monotonic==1.4
 msgpack==0.5.6
 munch==2.2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 8fda5ef..5544d0e 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,7 +4,6 @@
 hacking>=3.0.1,<3.1.0 # Apache-2.0
 
 coverage>=4.5.1 # Apache-2.0
-mock>=2.0.0 # BSD
 oslo.config>=5.2.0 # Apache-2.0
 pylint==1.4.5 # GPLv2
 selenium>=3.11.0 # Apache-2.0