diff --git a/.github/workflows/build_docker_images.yml b/.github/workflows/build_docker_images.yml
index 8f140752508f..85a1b9bcd2e5 100644
--- a/.github/workflows/build_docker_images.yml
+++ b/.github/workflows/build_docker_images.yml
@@ -2,6 +2,8 @@ name: Test, build, and push Docker images
 
 on:
   pull_request: # During PRs, we just check if the changes Dockerfiles can be successfully built
+    branches:
+      - main
     paths:
       - "docker/**"
   workflow_dispatch: