diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7bb1f78..8e3f2d0 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,6 +10,8 @@ jobs:
         os: [ubuntu-latest, macOS-latest, windows-latest]
     steps:
     - uses: actions/checkout@v2
+      with:
+        submodules: true
     - uses: iffy/install-nim@v1.1
     - name: Build
       run: nimble install -y