diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bab5342..77132c8 100755
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -35,7 +35,7 @@ jobs:
         database: ['mariadb', 'pgsql']
         include:
           - php: '8.2'
-            moodle-branch: 'main'
+            moodle-branch: 'MOODLE_403_STABLE'
             database: 'pgsql'
 
     steps: