diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index baeae28ee1..b7b8cfbce4 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -163,6 +163,7 @@ jobs:
     with:
       # windows smoke tests are slower, and it's rare for only the windows smoke tests to break
       skip-windows: true
+      cache-read-only: true
 
   muzzle:
     # release branches are excluded