diff --git a/.github/workflows/cron.yml b/.github/workflows/cron.yml
index b12e35d667..fa68be8c68 100644
--- a/.github/workflows/cron.yml
+++ b/.github/workflows/cron.yml
@@ -37,6 +37,9 @@ jobs:
         python -m pip list
     - name: Run tests report coverage
       run: |
+        export LAUNCH_DELAY=$[ $RANDOM % 16 * 60 ]
+        echo "Sleep $LAUNCH_DELAY"
+        sleep $LAUNCH_DELAY
         nvidia-smi
         export CUDA_VISIBLE_DEVICES=$(python -m tests.utils)
         echo $CUDA_VISIBLE_DEVICES