diff --git a/.github/workflows/build-and-test-arm.yml b/.github/workflows/build-and-test-arm.yml
index d61e7f92e983..2f356c696eb6 100644
--- a/.github/workflows/build-and-test-arm.yml
+++ b/.github/workflows/build-and-test-arm.yml
@@ -6,6 +6,9 @@ on:
       - 'v[0-9]+.[0-9]+.[0-9]+*'
   merge_group:
   pull_request:
+    types: [opened, synchronize, reopened, labeled, unlabeled]
+    branches:
+      - main
 env:
   TEST_RESULTS: testbed/tests/results/junit/results.xml
   # Make sure to exit early if cache segment download times out after 2 minutes.