diff --git a/.gitlab/ci/integration/slack.yml b/.gitlab/ci/integration/slack.yml
index 7ce7b6439..31ef4a9cf 100644
--- a/.gitlab/ci/integration/slack.yml
+++ b/.gitlab/ci/integration/slack.yml
@@ -1,8 +1,15 @@
 slack:
   extends:
     - .template_integration
+  rules:
+    - if: $CI_MERGE_REQUEST_ID
+      when: never
+    - if: '$CI_COMMIT_BRANCH =~ /^private/'
+      when: manual
+      allow_failure: true
+    - when: always
   script:
     - bundle exec rake zammad:db:unseeded
     - echo "gem 'slack-api'" >> Gemfile.local
     - bundle install -j $(nproc)
-    - bundle exec rails test test/integration/slack_test.rb
\ No newline at end of file
+    - bundle exec rails test test/integration/slack_test.rb