diff --git a/.github/workflows/run-tests.yaml b/.github/workflows/run-tests.yaml
index 9fcf87c..8e18e29 100644
--- a/.github/workflows/run-tests.yaml
+++ b/.github/workflows/run-tests.yaml
@@ -8,6 +8,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: "recursive"
 
       - name: Install Lua
         uses: leafo/gh-actions-lua@v10