diff --git a/.github/workflows/pull_request.yaml b/.github/workflows/pull_request.yaml
index c1357f39d..6cb4a521b 100644
--- a/.github/workflows/pull_request.yaml
+++ b/.github/workflows/pull_request.yaml
@@ -4,9 +4,11 @@ on:
   push:
     branches:
       - main
+      - 2.3.x
   pull_request:
     branches:
       - main
+      - 2.3.x
 
 jobs:
   test: