diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c583fd7..385ee21 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -28,17 +28,19 @@ jobs:
               version=latest
               ;;
           esac
-          tags="groonga/groonga:${version}-${{ matrix.id }}"
+          tag="groonga/groonga:${version}-${{ matrix.id }}"
+          tags="${tag}"
           if [ ${{ matrix.id }} = "debian" -a "${version}" = "latest" ]; then
             tags="${tags},groonga/groonga:latest"
           fi
 
           need_push="no"
-          if [ "${GITHUB_EVENT_NAME}" = "push" ]; then
+          if [ "${GITHUB_EVENT_NAME}" = "push" ] && [ "${GITHUB_REPOSITORY}" = "groonga/docker" ]; then
             need_push="yes"
           fi
           echo "DISTRIBUTION=${distribution}" >> ${GITHUB_ENV}
           echo "CONTEXT=./${distribution}" >> ${GITHUB_ENV}
+          echo "TAG=${tag}" >> ${GITHUB_ENV}
           echo "TAGS=${tags}" >> ${GITHUB_ENV}
           echo "NEED_PUSH=${need_push}" >> ${GITHUB_ENV}
       - uses: actions/checkout@v4
@@ -56,9 +58,13 @@ jobs:
           # cache-to: type=gha,mode=max
           context: ${{ env.CONTEXT }}
           push: ${{ env.NEED_PUSH == 'yes' }}
+          load: ${{ env.NEED_PUSH != 'yes' }}
           tags: ${{ env.TAGS }}
       - name: Image info
         run: |
           echo "ref: ${{ github.ref }}"
           echo "tags: ${{ env.TAGS }}"
           echo "digest: ${{ steps.docker_build.outputs.digest }}"
+      - name: Test if groonga command is executable
+        run: |
+          docker container run --rm --entrypoint "groonga" "${TAG}" --version