diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index ef7fcd4e..4152f9a4 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -4,7 +4,7 @@ on:
   workflow_dispatch: 
   push:
     branches:
-    - 'main'
+    - 'TU19'
     paths:
       - '**'
       - '!.gitignore'