diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e648414..0b58f33 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
       fail-fast: true
       matrix:
         php: ['8.1', '8.3']
-        moodle-branch: ['main']
+        moodle-branch: ['MOODLE_405_STABLE']
         database: [mariadb]
 
     steps: