diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7c932fb..ac2bd14 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - master
+      - php5.x-master
   pull_request:
   schedule:
     - cron: '0 17 * * *'