diff --git a/config_defaults.yml b/config_defaults.yml
index d22d2686..7dfe9140 100644
--- a/config_defaults.yml
+++ b/config_defaults.yml
@@ -5,6 +5,7 @@
   pidfile_workaround: false
   additional_packages: ''
   acceptance_tests: true
+  main_branches: ['main', 'master']
 # PDK creates this
 .github/workflows/puppet-lint.yml:
   delete: true
diff --git a/moduleroot/.github/workflows/ci.yml.erb b/moduleroot/.github/workflows/ci.yml.erb
index 5d66b666..3486151d 100644
--- a/moduleroot/.github/workflows/ci.yml.erb
+++ b/moduleroot/.github/workflows/ci.yml.erb
@@ -4,7 +4,13 @@
 
 name: CI
 
-on: pull_request
+on:
+  pull_request: {}
+  push:
+    branches:
+<%- @configs['main_branches'].each do |main_branch| -%>
+      - <%= main_branch %>
+<%- end -%>
 
 concurrency:
   group: ${{ github.ref_name }}