diff --git a/docs/fedora-deps.md b/docs/fedora-deps.md
index 29b477f12..484f409d2 100644
--- a/docs/fedora-deps.md
+++ b/docs/fedora-deps.md
@@ -42,7 +42,7 @@ Packages required for UI development
 Packages required for tests
 ---------------------------
 
-    $ sudo yum install pyflakes python-pep8 python-requests rpmlint
+    $ sudo yum install pyflakes python-pep8 python-requests rpmlint python-mock
 
     # For RHEL systems, install the additional packages:
     $ sudo yum install python-unittest2
diff --git a/docs/opensuse-deps.md b/docs/opensuse-deps.md
index a6086da4c..eee39f9f2 100644
--- a/docs/opensuse-deps.md
+++ b/docs/opensuse-deps.md
@@ -31,3 +31,4 @@ Packages required for tests
 ---------------------------
 
     $ sudo zypper install python-pyflakes python-pep8 python-requests rpmlint
+                          python-mock
diff --git a/docs/ubuntu-deps.md b/docs/ubuntu-deps.md
index cdffc596d..36079984e 100644
--- a/docs/ubuntu-deps.md
+++ b/docs/ubuntu-deps.md
@@ -30,4 +30,4 @@ Packages required for UI development
 Packages required for tests
 ---------------------------
 
-    $ sudo apt-get install pep8 pyflakes python-requests
+    $ sudo apt-get install pep8 pyflakes python-requests python-mock