diff --git a/.github/workflows/test_size.yml b/.github/workflows/test_size.yml
index dc1eabc846..ed38175a1f 100644
--- a/.github/workflows/test_size.yml
+++ b/.github/workflows/test_size.yml
@@ -1,6 +1,6 @@
 name: test size
 
-on: [push, pull_request, workflow_dispatch]
+on: [pull_request]
 # paths:
 # - "*"
 # - "!README.md" <-- don't rebuild on doc change