diff --git a/bin/close-subsplit-prs.yml b/bin/close-subsplit-prs.yml
index 2fd8d7430..f2a3ea9e4 100644
--- a/bin/close-subsplit-prs.yml
+++ b/bin/close-subsplit-prs.yml
@@ -2,6 +2,10 @@
 name: Close sub-split PRs
 
 on:
+  pull_request:
+    branches:
+      - 2.x
+      - 3.x
   schedule:
     - cron: '30 7 * * *'
 
diff --git a/src/AwsS3V3/.github/workflows/close-subsplit-prs.yaml b/src/AwsS3V3/.github/workflows/close-subsplit-prs.yaml
index 2fd8d7430..f2a3ea9e4 100644
--- a/src/AwsS3V3/.github/workflows/close-subsplit-prs.yaml
+++ b/src/AwsS3V3/.github/workflows/close-subsplit-prs.yaml
@@ -2,6 +2,10 @@
 name: Close sub-split PRs
 
 on:
+  pull_request:
+    branches:
+      - 2.x
+      - 3.x
   schedule:
     - cron: '30 7 * * *'