diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5e5b62f..1d65440 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -104,12 +104,14 @@ jobs:
       - name: rustunnel generate --help
         run: cargo run --release -- generate --help
       - name: Invalid command fails
+        shell: bash
         run: |
           if cargo run --release -- invalid-cmd 2>&1; then
             echo "ERROR: invalid command should have failed"
             exit 1
           fi
       - name: Invalid port fails
+        shell: bash
         run: |
           if cargo run --release -- listen --listen localhost:bad --cert x --key x --ca-cert x --auth-token x 2>&1; then
             echo "ERROR: invalid port should have failed"