diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 0f2c625a3..5045a1b9c 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -1,5 +1,5 @@
 name: ci
-on: push
+on: [push, pull_request]
 jobs:
   test-27:
     runs-on: ${{ matrix.platform }}