diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index cf1cf36..25e641a 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -6,6 +6,7 @@ jobs:
     test:
       runs-on: ubuntu-latest
       steps:
+      - uses: actions/checkout@v1
       - name: Set up JDK 1.13
         uses: actions/setup-java@v1
         with: