diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 424d77d6d..5332990a1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,6 +9,8 @@ jobs:
         deno: ["v1.x"]
     steps:
       - uses: actions/checkout@v2
+        with:
+          submodules: recursive
       - uses: denoland/setup-deno@main
         with:
           deno-version: ${{ matrix.deno }}