diff --git a/.github/workflows/truffle-ruby-test.yml b/.github/workflows/truffle-ruby-test.yml
index 43ffb0ba5..37d6f06b4 100644
--- a/.github/workflows/truffle-ruby-test.yml
+++ b/.github/workflows/truffle-ruby-test.yml
@@ -8,6 +8,7 @@ on:
 
 jobs:
   irb:
+    if: github.repository == 'ruby/irb' || github.event_name != 'schedule'
     name: rake test truffleruby-head ${{ matrix.with_latest_reline && '(latest reline)' || '' }}
     strategy:
       matrix: