diff --git a/github/workflows/os-check.yml b/github/workflows/os-check.yml
index c56b699..db3590b 100644
--- a/github/workflows/os-check.yml
+++ b/github/workflows/os-check.yml
@@ -17,6 +17,8 @@ jobs:
           profile: minimal
           toolchain: stable
       - uses: actions/checkout@v3
+        with:
+          submodules: true
       - name: cargo test
         uses: actions-rs/cargo@v1
         with: