diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index 13a366a..a900264 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -7,6 +7,9 @@ on:
   pull_request:
     branches:
       - master
+      - 19.x
+      - 18.x
+      - 17.x
 jobs:
   buildAndTest:
     runs-on: ubuntu-latest