diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0e68f1780..25da999de 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -262,7 +262,6 @@ jobs:
     runs-on: ${{ matrix.os }}
     defaults:
       run:
-        shell: bash
         working-directory: ./crates/voicevox_core_python_api
     steps:
       - uses: actions/checkout@v3