diff --git a/.github/workflows/manual.yml b/.github/workflows/manual.yml
index 3e6dc88..f5af719 100644
--- a/.github/workflows/manual.yml
+++ b/.github/workflows/manual.yml
@@ -19,7 +19,7 @@ jobs:
         uses: actions/checkout@v2.3.4
        
       - name: Prepare
-        run: sudo apt-get install zfsutils-linux && sudo pip3 install coverage unittest2
+        run: sudo apt-get install zfsutils-linux && sudo pip3 install coverage unittest2 mock
        
        
       - name: Regression test