diff --git a/.github/workflows/bench.yml b/.github/workflows/bench.yml
index f60dbb31..746c0704 100644
--- a/.github/workflows/bench.yml
+++ b/.github/workflows/bench.yml
@@ -1,6 +1,8 @@
 name: bench
 
-on: [push]
+on:
+  pull_request:
+    types: [review_requested]
 
 jobs:
   plan: