diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5864016..cc0d1ec 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -62,7 +62,11 @@ jobs:
         env:
           PGPASSWORD: pgroonga
         run: |
-          tag="${LATEST_VERSION}-${{ matrix.id }}"
+          if [ ${GITHUB_EVENT_NAME} = "schedule" ]; then
+            tag="${LATEST_VERSION}-${{ matrix.id }}"
+          else
+            tag="latest-${{ matrix.id }}"
+          fi
           docker_image="groonga/pgroonga:${tag}"
           docker run \
             -d \