diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ecf856f..5b7bc94 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,6 +17,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - uses: actions/setup-go@v5
         with: { go-version: "${{ matrix.go }}", cache: false }
 
@@ -30,6 +32,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - uses: actions/setup-go@v5
         with: { go-version: "1.21", cache: false }