diff --git a/.github/workflows/manual-matrix-test.yml b/.github/workflows/manual-matrix-test.yml
index 266944d6..fca089a8 100644
--- a/.github/workflows/manual-matrix-test.yml
+++ b/.github/workflows/manual-matrix-test.yml
@@ -2,6 +2,9 @@ name: Manual Matrix Test
 
 on:
   workflow_dispatch:
+  pull_request:
+    branches:
+      - main
 
 jobs:
   changed-files: