diff --git a/.github/workflows/build_and_test.yml b/.github/workflows/build_and_test.yml
index be60c34a..22e9d584 100644
--- a/.github/workflows/build_and_test.yml
+++ b/.github/workflows/build_and_test.yml
@@ -1,6 +1,6 @@
 name: Build & Test
 
-on: [push]
+on: [pull_request]
 
 env:
   SMTP_HOST: localhost