diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 506bb3e..48fece1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,7 +7,7 @@ on:
     - cron:  '0 18 * * *'
 
 concurrency:
-  group: ci-build-${{ github.head_ref }}
+  group: ci-build-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
 jobs:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d802865..94bd03f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,7 @@ on:
     - cron:  '0 18 * * *'
 
 concurrency:
-  group: ci-test-${{ github.head_ref }}
+  group: ci-test-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
 jobs: