diff --git a/.github/workflows/actions/test/action.yml b/.github/workflows/actions/test/action.yml
new file mode 100644
index 0000000..f6f1dd7
--- /dev/null
+++ b/.github/workflows/actions/test/action.yml
@@ -0,0 +1,36 @@
+name: Test
+description: Test the image
+
+inputs:
+  test-tag:
+    required: true
+
+env:
+  RAILS_ENV: development
+
+runs:
+  using: composite
+
+  steps:
+    - uses: actions/checkout@v4
+      with:
+        repository: redmine/redmine
+        ref: master
+        path: redmine
+
+    - run: |
+        docker volume create redmine-bundle-cache
+
+        cd redmine
+        cat <<EOS > config/database.yml
+        development:
+          adapter: sqlite3
+          database: db/development.sqlite3
+        EOS
+
+        docker run --rm -v ${PWD}:/redmine \
+        -v redmine-bundle-cache:/bundle \
+        -p 3000:3000 \
+        ${{ inputs.test-tag }} \
+        bash -c "bundle install && bin/about"
+
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..adda640
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,54 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '**.md'
+      - 'redmined'
+  workflow_dispatch:
+
+env:
+  TEST_TAG: redmined:test
+  IMAGE_TAG: ghcr.io/hidakatsuya/redmined:latest
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: docker/setup-qemu-action@v3
+
+      - uses: docker/setup-buildx-action@v3
+
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and export to Docker for testing
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          load: true
+          tags: ${{ env.TEST_TAG }}
+
+      - name: Test
+        uses: ./.github/actions/test
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ env.IMAGE_TAG }}
+
diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
deleted file mode 100644
index ce1cc82..0000000
--- a/.github/workflows/docker-publish.yml
+++ /dev/null
@@ -1,45 +0,0 @@
-name: Docker
-
-on:
-  push:
-    branches:
-      - main
-    paths-ignore:
-      - '**.md'
-      - 'redmined'
-
-  workflow_dispatch:
-
-jobs:
-  build-and-push-image:
-    runs-on: ubuntu-latest
-
-    permissions:
-      contents: read
-      packages: write
-
-    steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v4
-      -
-        name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-      -
-        name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-      -
-        name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      -
-        name: Build and push
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          platforms: linux/amd64,linux/arm64
-          push: true
-          tags: ghcr.io/hidakatsuya/redmined:latest