diff --git a/doc/requirements.txt b/doc/requirements.txt
index f34464e..599ae31 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -7,7 +7,6 @@
 # be installed in a specific order.
 #
 # Requirements for docs
-mock>=2.0.0 # BSD
 openstackdocstheme>=2.2.1 # Apache-2.0
 reno>=3.1.0 # Apache-2.0
 sphinx>=2.0.0,!=2.1.0 # BSD
diff --git a/lower-constraints.txt b/lower-constraints.txt
index 744048f..9909160 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -39,7 +39,6 @@ jsonschema==2.6.0
 keystoneauth1==3.4.0
 linecache2==1.0.0
 MarkupSafe==1.0
-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 0f72350..f070d4a 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -10,5 +10,4 @@
 hacking>=3.0.1,<3.1.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
-mock>=2.0.0 # BSD
 testtools>=2.3.0 # MIT