diff --git a/debian/changelog b/debian/changelog
index 5eb5afc7383..f1ac2a2ca48 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,6 +2,7 @@ cloud-init (22.1-43-gbf94945f-0ubuntu1~20.04.1) UNRELEASED; urgency=medium
 
   * d/control:
     - add python3-responses for unittests
+    - add python3-pytest-mock for unittests
     - add Suggests: ssh-import-id
   * refresh patches:
    + debian/patches/retain-apt-partner-pocket.patch
diff --git a/debian/control b/debian/control
index 76a71c0f9a1..22283adf71e 100644
--- a/debian/control
+++ b/debian/control
@@ -18,6 +18,7 @@ Build-Depends: debhelper (>= 9.20160709),
                python3-netifaces,
                python3-oauthlib,
                python3-pytest,
+               python3-pytest-mock,
                python3-requests,
                python3-serial,
                python3-setuptools,