diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index e88219ad..8895cf9a 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -28,6 +28,8 @@ jobs:
         python-version: ['3.11']
     steps:
       - uses: actions/checkout@v3
+        with:
+          submodules: 'true'
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
         with: