diff --git a/.github/workflows/evals.yml b/.github/workflows/evals.yml
index 9f39d0741..629d371d3 100644
--- a/.github/workflows/evals.yml
+++ b/.github/workflows/evals.yml
@@ -5,7 +5,7 @@ on:
   workflow_dispatch:
 
 concurrency:
-  group: evals-${{ github.head_ref || github.run_id }}
+  group: evals-${{ github.event.pull_request.number || github.run_id }}
   cancel-in-progress: true
 
 env:
diff --git a/.github/workflows/windows-free-tests.yml b/.github/workflows/windows-free-tests.yml
index 25725cf91..b745be611 100644
--- a/.github/workflows/windows-free-tests.yml
+++ b/.github/workflows/windows-free-tests.yml
@@ -28,7 +28,7 @@ on:
   workflow_dispatch:
 
 concurrency:
-  group: windows-free-${{ github.head_ref || github.run_id }}
+  group: windows-free-${{ github.event.pull_request.number || github.run_id }}
   cancel-in-progress: true
 
 jobs: