diff --git a/.github/workflows/build-and-archive-debian-package.yml b/.github/workflows/build-and-archive-debian-package.yml
index 9173d5c..faf779b 100644
--- a/.github/workflows/build-and-archive-debian-package.yml
+++ b/.github/workflows/build-and-archive-debian-package.yml
@@ -60,7 +60,7 @@ jobs:
           name: ${{ env.filename }}
           path: ${{ steps.build-debian-package.outputs.deb-package }}
   slack-workflow-status:
-    if: ${{ always() && (github.repository_owner == 'WLAN-Pi') }}
+    if: ${{ always() && (github.repository_owner == 'WLAN-Pi') && (github.event.pull_request.head.repo.full_name == github.repository) }}
     name: Post Workflow Status to Slack
     needs:
       - sbuild
diff --git a/.github/workflows/deploy-to-packagecloud.yml b/.github/workflows/deploy-to-packagecloud.yml
index 0ab1070..1f6755d 100644
--- a/.github/workflows/deploy-to-packagecloud.yml
+++ b/.github/workflows/deploy-to-packagecloud.yml
@@ -82,7 +82,7 @@ jobs:
           packagecloud-distrib: debian/${{ matrix.distro }}
           packagecloud-token: ${{ secrets.PACKAGECLOUD_TOKEN }}
   slack-workflow-status:
-    if: ${{ always() && (github.repository_owner == 'WLAN-Pi') }}
+    if: ${{ always() && (github.repository_owner == 'WLAN-Pi') && (github.event.pull_request.head.repo.full_name == github.repository) }}
     name: Post workflow status to Slack
     needs:
       - sbuild
diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index e141026..5a8a1cd 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -53,7 +53,7 @@ jobs:
         tox
 
   slack-workflow-status:
-    if: ${{ always() && (github.repository_owner == 'WLAN-Pi') }}
+    if: ${{ always() && (github.repository_owner == 'WLAN-Pi') && (github.event.pull_request.head.repo.full_name == github.repository) }}
     name: Post Workflow Status to Slack
     needs:
       - python