diff --git a/.github/workflows/rust_test_tube.yml b/.github/workflows/rust_test_tube.yml
index 7e2f4c70d..2c9d9a5d9 100644
--- a/.github/workflows/rust_test_tube.yml
+++ b/.github/workflows/rust_test_tube.yml
@@ -17,6 +17,8 @@ jobs:
   test-tube:
     runs-on: ubuntu-latest
     steps:
+      - name: test
+        run: echo $GITHUB_HEAD_REF
       - name: Check out repository code
         uses: actions/checkout@v3
       - name: Install Rust