diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0e49ad7985..7e5ac3589c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,5 +30,8 @@ jobs:
 
       - name: Use gcloud CLI
         run: gcloud info
+      - uses: actions/checkout@v2
+        with:
+          path: upb
       - name: Run tests
-        run: kokoro/ubuntu/build.sh
+        run: ${{ github.workspace }}/kokoro/ubuntu/build.sh