diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index d633c1f..badc0c1 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -1,6 +1,6 @@
 name: Unit tests
 
-on: push
+on: pull_request
 
 jobs:
   test: