diff --git a/.github/workflows/test-and-deploy-ipv4only.yaml b/.github/workflows/test-and-deploy-ipv4only.yaml
index 3a464864..f6266dfc 100644
--- a/.github/workflows/test-and-deploy-ipv4only.yaml
+++ b/.github/workflows/test-and-deploy-ipv4only.yaml
@@ -74,6 +74,7 @@ jobs:
       - run: |
           cmdeploy init staging-ipv4.testrun.org
           sed -i 's#disable_ipv6 = False#disable_ipv6 = True#' chatmail.ini
+          sed -i 's/#\s*mtail_address/mtail_address/' chatmail.ini
 
       - run: cmdeploy run --verbose --skip-dns-check
 
diff --git a/.github/workflows/test-and-deploy.yaml b/.github/workflows/test-and-deploy.yaml
index cd600a65..d38a8869 100644
--- a/.github/workflows/test-and-deploy.yaml
+++ b/.github/workflows/test-and-deploy.yaml
@@ -74,7 +74,9 @@ jobs:
       - name: run deploy-chatmail offline tests 
         run: pytest --pyargs cmdeploy 
 
-      - run: cmdeploy init staging2.testrun.org
+      - run: |
+          cmdeploy init staging2.testrun.org
+          sed -i 's/#\s*mtail_address/mtail_address/' chatmail.ini
 
       - run: cmdeploy run --verbose --skip-dns-check