diff --git a/.github/workflows/integration-tests.yml b/.github/workflows/integration-tests.yml
deleted file mode 100644
index 266ba395..00000000
--- a/.github/workflows/integration-tests.yml
+++ /dev/null
@@ -1,57 +0,0 @@
-name: integration-tests
-on:
-  pull_request:
-    branches:
-      - main
-    paths:
-      - '.github/workflows/integration-tests.yml'
-      - '**.py'
-      - '**.ts'
-      - '**.tsx'
-      - 'package.json'
-      - 'package-lock.json'
-      - 'tsconfig.json'
-jobs:
-  test:
-    runs-on: ubuntu-20.04
-    strategy:
-      matrix:
-        optuna-version: ['optuna==2.10.0', 'git+https://github.com/optuna/optuna.git']
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: Setup Node
-        uses: actions/setup-node@v2
-        with:
-          node-version: '16'
-      - run: npm install
-      - run: npm run build:dev
-
-      - name: Set up Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: '3.8'
-          architecture: x64
-      - name: Setup Optuna ${{ matrix.optuna-version }}
-        run: |
-          python -m pip install --progress-bar off --upgrade pip setuptools
-          python -m pip install --progress-bar off --upgrade ${{ matrix.optuna-version }}
-      - name: Install dependencies
-        run: |
-          python -m pip install --progress-bar off .
-          python -m pip install --progress-bar off pyppeteer
-
-      - name: Cache headless chromium
-        id: cache-chromium
-        uses: actions/cache@v2
-        with:
-          path: ./local-chromium
-          key: chromium
-      - run: pyppeteer-install
-        if: steps.cache-chromium.outputs.cache-hit != 'true'
-        env:
-          PYPPETEER_HOME: ./local-chromium
-
-      - run: python hack/visual_regression_test.py --skip-screenshot --sleep 3
-        env:
-          PYPPETEER_HOME: ./local-chromium