diff --git a/.github/workflows/test-backend.yml b/.github/workflows/test-backend.yml
index 3bf3b9eff5..57bf53b168 100644
--- a/.github/workflows/test-backend.yml
+++ b/.github/workflows/test-backend.yml
@@ -21,14 +21,54 @@ on:
   workflow_dispatch:
 
 jobs:
-  unit:
-    name: Unit tests (backend)
+  build:
+    name: Build (${{ matrix.node-version-file }})
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version-file:
-          - .node-version
-          - .github/min.node-version
+        include:
+          - node-version-file: .node-version
+            artifact-name: backend-test-repo-node-version
+          - node-version-file: .github/min.node-version
+            artifact-name: backend-test-repo-min-node-version
+
+    steps:
+    - uses: actions/checkout@v6.0.3
+      with:
+        submodules: true
+    - name: Setup pnpm
+      uses: pnpm/action-setup@v6.0.9
+    - name: Use Node.js
+      uses: actions/setup-node@v6.4.0
+      with:
+        node-version-file: ${{ matrix.node-version-file }}
+        cache: 'pnpm'
+    - run: pnpm i --frozen-lockfile
+    - name: Check pnpm-lock.yaml
+      run: git diff --exit-code pnpm-lock.yaml
+    - name: Copy Configure
+      run: cp .github/misskey/test.yml .config
+    - name: Build
+      run: pnpm build
+    - name: Archive built repository
+      run: tar -C "$GITHUB_WORKSPACE" -czf "$RUNNER_TEMP/${{ matrix.artifact-name }}.tar.gz" .
+    - name: Upload built repository
+      uses: actions/upload-artifact@v7
+      with:
+        name: ${{ matrix.artifact-name }}
+        path: ${{ runner.temp }}/${{ matrix.artifact-name }}.tar.gz
+
+  unit:
+    name: Unit tests (backend)
+    runs-on: ubuntu-latest
+    needs: build
+    strategy:
+      matrix:
+        include:
+          - node-version-file: .node-version
+            artifact-name: backend-test-repo-node-version
+          - node-version-file: .github/min.node-version
+            artifact-name: backend-test-repo-min-node-version
 
     services:
       postgres:
@@ -51,9 +91,13 @@ jobs:
           MEILI_ENV: development
 
     steps:
-    - uses: actions/checkout@v6.0.3
+    - name: Download built repository
+      uses: actions/download-artifact@v8
       with:
-        submodules: true
+        name: ${{ matrix.artifact-name }}
+        path: ${{ runner.temp }}
+    - name: Extract built repository
+      run: tar -C "$GITHUB_WORKSPACE" -xzf "$RUNNER_TEMP/${{ matrix.artifact-name }}.tar.gz"
     - name: Setup pnpm
       uses: pnpm/action-setup@v6.0.9
     - name: Install FFmpeg
@@ -64,13 +108,6 @@ jobs:
       with:
         node-version-file: ${{ matrix.node-version-file }}
         cache: 'pnpm'
-    - run: pnpm i --frozen-lockfile
-    - name: Check pnpm-lock.yaml
-      run: git diff --exit-code pnpm-lock.yaml
-    - name: Copy Configure
-      run: cp .github/misskey/test.yml .config
-    - name: Build
-      run: pnpm build
     - name: Test
       run: pnpm --filter backend test-and-coverage
     - name: Upload to Codecov
@@ -82,12 +119,15 @@ jobs:
   e2e:
     name: E2E tests (backend)
     runs-on: ubuntu-latest
+    needs: build
     strategy:
       fail-fast: false
       matrix:
-        node-version-file:
-          - .node-version
-          - .github/min.node-version
+        include:
+          - node-version-file: .node-version
+            artifact-name: backend-test-repo-node-version
+          - node-version-file: .github/min.node-version
+            artifact-name: backend-test-repo-min-node-version
 
     services:
       postgres:
@@ -103,9 +143,13 @@ jobs:
           - 56312:6379
 
     steps:
-      - uses: actions/checkout@v6.0.3
+      - name: Download built repository
+        uses: actions/download-artifact@v8
         with:
-          submodules: true
+          name: ${{ matrix.artifact-name }}
+          path: ${{ runner.temp }}
+      - name: Extract built repository
+        run: tar -C "$GITHUB_WORKSPACE" -xzf "$RUNNER_TEMP/${{ matrix.artifact-name }}.tar.gz"
       - name: Setup pnpm
         uses: pnpm/action-setup@v6.0.9
       - name: Use Node.js
@@ -113,13 +157,6 @@ jobs:
         with:
           node-version-file: ${{ matrix.node-version-file }}
           cache: 'pnpm'
-      - run: pnpm i --frozen-lockfile
-      - name: Check pnpm-lock.yaml
-        run: git diff --exit-code pnpm-lock.yaml
-      - name: Copy Configure
-        run: cp .github/misskey/test.yml .config
-      - name: Build
-        run: pnpm build
       - name: Test
         run: pnpm --filter backend test-and-coverage:e2e
       - name: Upload to Codecov
@@ -131,11 +168,12 @@ jobs:
   migration:
     name: Migration tests (backend)
     runs-on: ubuntu-latest
+    needs: build
     strategy:
       matrix:
-        node-version-file:
-          - .node-version
-          #- .github/min.node-version
+        include:
+          - node-version-file: .node-version
+            artifact-name: backend-test-repo-node-version
 
     services:
       postgres:
@@ -147,9 +185,13 @@ jobs:
           POSTGRES_HOST_AUTH_METHOD: trust
 
     steps:
-      - uses: actions/checkout@v6.0.3
+      - name: Download built repository
+        uses: actions/download-artifact@v8
         with:
-          submodules: true
+          name: ${{ matrix.artifact-name }}
+          path: ${{ runner.temp }}
+      - name: Extract built repository
+        run: tar -C "$GITHUB_WORKSPACE" -xzf "$RUNNER_TEMP/${{ matrix.artifact-name }}.tar.gz"
       - name: Setup pnpm
         uses: pnpm/action-setup@v6.0.9
       - name: Get current date
@@ -160,13 +202,6 @@ jobs:
         with:
           node-version-file: ${{ matrix.node-version-file }}
           cache: 'pnpm'
-      - run: pnpm i --frozen-lockfile
-      - name: Check pnpm-lock.yaml
-        run: git diff --exit-code pnpm-lock.yaml
-      - name: Copy Configure
-        run: cp .github/misskey/test.yml .config
-      - name: Build
-        run: pnpm build
       - name: Run migrations
         run: MISSKEY_CONFIG_YML=test.yml pnpm --filter backend migrate
       - name: Check no migrations are remaining
diff --git a/.github/workflows/test-frontend.yml b/.github/workflows/test-frontend.yml
index e8a98b2b78..800e1e664e 100644
--- a/.github/workflows/test-frontend.yml
+++ b/.github/workflows/test-frontend.yml
@@ -23,8 +23,8 @@ on:
       - .github/workflows/test-frontend.yml
       - .github/misskey/test.yml
 jobs:
-  vitest:
-    name: Unit tests (frontend)
+  build:
+    name: Build
     runs-on: ubuntu-latest
 
     steps:
@@ -45,6 +45,34 @@ jobs:
       run: cp .github/misskey/test.yml .config
     - name: Build
       run: pnpm build
+    - name: Archive built repository
+      run: tar -C "$GITHUB_WORKSPACE" -czf "$RUNNER_TEMP/frontend-test-repo.tar.gz" .
+    - name: Upload built repository
+      uses: actions/upload-artifact@v7
+      with:
+        name: frontend-test-repo
+        path: ${{ runner.temp }}/frontend-test-repo.tar.gz
+
+  vitest:
+    name: Unit tests (frontend)
+    runs-on: ubuntu-latest
+    needs: build
+
+    steps:
+    - name: Download built repository
+      uses: actions/download-artifact@v8
+      with:
+        name: frontend-test-repo
+        path: ${{ runner.temp }}
+    - name: Extract built repository
+      run: tar -C "$GITHUB_WORKSPACE" -xzf "$RUNNER_TEMP/frontend-test-repo.tar.gz"
+    - name: Setup pnpm
+      uses: pnpm/action-setup@v6.0.9
+    - name: Use Node.js
+      uses: actions/setup-node@v6.4.0
+      with:
+        node-version-file: '.node-version'
+        cache: 'pnpm'
     - name: Test
       run: pnpm --filter frontend test-and-coverage
     - name: Upload Coverage
@@ -56,6 +84,7 @@ jobs:
   e2e:
     name: E2E tests (frontend)
     runs-on: ubuntu-latest
+    needs: build
 
     services:
       postgres:
@@ -71,9 +100,13 @@ jobs:
           - 56312:6379
 
     steps:
-    - uses: actions/checkout@v6.0.3
+    - name: Download built repository
+      uses: actions/download-artifact@v8
       with:
-        submodules: true
+        name: frontend-test-repo
+        path: ${{ runner.temp }}
+    - name: Extract built repository
+      run: tar -C "$GITHUB_WORKSPACE" -xzf "$RUNNER_TEMP/frontend-test-repo.tar.gz"
     - name: Setup pnpm
       uses: pnpm/action-setup@v6.0.9
     - name: Use Node.js
@@ -81,11 +114,6 @@ jobs:
       with:
         node-version-file: '.node-version'
         cache: 'pnpm'
-    - run: pnpm i --frozen-lockfile
-    - name: Copy Configure
-      run: cp .github/misskey/test.yml .config
-    - name: Build
-      run: pnpm build
     - name: Playwright install
       working-directory: packages/frontend
       run: pnpm exec playwright install --with-deps chromium