diff --git a/.github/workflows/regression_test.yml b/.github/workflows/regression_test.yml
index 74fb1cee..ea483108 100644
--- a/.github/workflows/regression_test.yml
+++ b/.github/workflows/regression_test.yml
@@ -27,6 +27,7 @@ jobs:
           ./script/download_data.sh
 
       - name: Build
+        shell: bash
         run: |
           source /opt/ros/humble/setup.bash
           mkdir -p build