diff --git a/.github/workflows/crypto-testing.yml b/.github/workflows/crypto-testing.yml
index aeeaf0c9186fe..eda543bbd8472 100644
--- a/.github/workflows/crypto-testing.yml
+++ b/.github/workflows/crypto-testing.yml
@@ -34,5 +34,6 @@ jobs:
     - name: run user-mode linux test harness
       run: |
         sudo ./linux initrd=uml-initramfs.cpio.gz | tee tcrypt.out
+      shell: bash
     - name: Setup upterm session
       uses: lhotari/action-upterm@v1
\ No newline at end of file