diff --git a/.github/workflows/ci-e2e.yaml b/.github/workflows/ci-e2e.yaml
index 891979ad..53e32b0d 100644
--- a/.github/workflows/ci-e2e.yaml
+++ b/.github/workflows/ci-e2e.yaml
@@ -14,11 +14,7 @@ concurrency:
 env:
   cache-version: 1
 
-# CI tests with the Cybozu internal use version plus the latest and one previous MySQL version.
-# Other MySQL supported versions tested weekly.
-# see: weekly.yaml
-#
-# NOTE: Current Cybozu internal use version is 8.0.28.
+# CI tests with supported MySQL version.
 jobs:
   dbtest:
     name: Integration tests with MySQL
diff --git a/.github/workflows/weekly.yaml b/.github/workflows/weekly.yaml
deleted file mode 100644
index 86797d96..00000000
--- a/.github/workflows/weekly.yaml
+++ /dev/null
@@ -1,64 +0,0 @@
-name: Weekly E2E
-
-on:
-  schedule:
-    # 11:00 (JST)
-    - cron: '0 2 * * 1'
-  workflow_dispatch:
-  push:
-    branches:  ["bump-v*"]
-
-env:
-  cache-version: 1
-
-# Weekly E2E tests using all MySQL versions supported by MOCO
-jobs:
-  dbtest:
-    name: Integration tests with MySQL
-    strategy:
-      matrix:
-        mysql-version: ["8.0.28", "8.0.36", "8.0.37", "8.4.0"]
-    runs-on: ubuntu-22.04
-    steps:
-    - uses: actions/checkout@v4
-    - uses: ./.github/actions/dbtest
-      with:
-        mysql-version: ${{ matrix.mysql-version }}
-
-  e2e:
-    name: Supported Kubernetes versions End-to-End Tests
-    strategy:
-      matrix:
-        mysql-version: ["8.4.0"]
-        k8s-version: ["1.27.13", "1.28.9", "1.29.4"]
-    runs-on:
-      group: moco
-    steps:
-    - uses: actions/checkout@v4
-    - uses: ./.github/actions/e2e
-      with:
-        k8s-version: ${{ matrix.k8s-version }}
-        mysql-version: ${{ matrix.mysql-version }}
-
-  e2e-mysql:
-    name: Supported MySQL versions End-to-End Tests
-    strategy:
-      matrix:
-        mysql-version: ["8.0.28", "8.0.36", "8.0.37", "8.4.0"]
-        k8s-version: ["1.29.4"]
-    runs-on:
-      group: moco
-    steps:
-    - uses: actions/checkout@v4
-    - uses: ./.github/actions/e2e
-      with:
-        k8s-version: ${{ matrix.k8s-version }}
-        mysql-version: ${{ matrix.mysql-version }}
-
-  upgrade:
-    name: Upgrade Test
-    runs-on:
-      group: moco
-    steps:
-    - uses: actions/checkout@v4
-    - uses: ./.github/actions/upgrade
diff --git a/DEVELOP.md b/DEVELOP.md
index d8fe9b6f..708b1266 100644
--- a/DEVELOP.md
+++ b/DEVELOP.md
@@ -26,10 +26,6 @@ To run these tests, use the following make targets respectively:
 3. `make envtest`
 4. Read [`e2e/README.md`](e2e/README.md)
 
-MOCO supports multiple MySQL versions.
-The three MySQL versions always used by CI are Cybozu internal use version, the latest, and one version before the latest.
-Other supported MySQL versions will be [tested only in Weekly](.github/workflows/weekly.yaml).
-
 ## Generated files
 
 Some files in the repository are auto-generated.