diff --git a/.github/workflows/largemodel_unit_test_CI.yml b/.github/workflows/largemodel_unit_test_CI.yml
index 00834085e..dfedc5e21 100644
--- a/.github/workflows/largemodel_unit_test_CI.yml
+++ b/.github/workflows/largemodel_unit_test_CI.yml
@@ -92,7 +92,7 @@ jobs:
 
       - name: Run Unit Tests
         run: |
-          export MQ_API_TEST_BRANCH="${GITHUB_REF##*/}"
+          export MQ_API_TEST_BRANCH=$(echo "${GITHUB_REF}" | cut -d'/' -f3-)
           tox -e py3-local_os_unit_tests_w_requirements -- --largemodel
 
   Stop-Runner: