diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b143b97367..367b031ce5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,7 +4,7 @@ on:
   # run this workflow on pull_request activity
   # this includes opening and pushing more commits
   pull_request:
-    branches: [ master, 3.24.x, 3.21.x ]
+    branches: [ master, 3.27.x, 3.24.x ]
 
 jobs:
   style_check: