diff --git a/.github/workflows/CI-master_tests.yml b/.github/workflows/CI-master_tests.yml
index 11a5eff..1bdcb55 100644
--- a/.github/workflows/CI-master_tests.yml
+++ b/.github/workflows/CI-master_tests.yml
@@ -6,7 +6,7 @@ on:
       - master
   
   schedule:
-    - cron: "5 4 * * *"
+    - cron: "5 4 * * SUN"
 
   workflow_dispatch: