diff --git a/.github/workflows/spec-tests.yml b/.github/workflows/spec-tests.yml
index 0e1d4bb..535d174 100644
--- a/.github/workflows/spec-tests.yml
+++ b/.github/workflows/spec-tests.yml
@@ -1,6 +1,6 @@
 name: spec tests
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   build-linux: