diff --git a/.github/workflows/transport-interop.yml b/.github/workflows/transport-interop.yml
index 230a5c6..94d4186 100644
--- a/.github/workflows/transport-interop.yml
+++ b/.github/workflows/transport-interop.yml
@@ -15,6 +15,7 @@ jobs:
   run-transport-interop:
     # runs-on: ['self-hosted', 'linux', 'x64', '4xlarge'] # https://github.com/pl-strflt/tf-aws-gh-runner/blob/main/runners.tf
     runs-on: ubuntu-latest
+    shell: bash
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/run-transport-interop-test