diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index cf569691..f7b0ec1d 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -1,7 +1,7 @@
 name: Check
 on: [ pull_request, push ]
 jobs:
-  mysql:
+  mysql5_7:
     runs-on: ubuntu-latest
     # push: always run.
     # pull_request: run only when the PR is submitted from a forked repository, not within this repository.
@@ -13,34 +13,88 @@ jobs:
         image: mysql:5.7
         options: --health-cmd "mysqladmin ping -h localhost" --health-interval 20s --health-timeout 10s --health-retries 10
         ports:
-          - "3306:3306"
+        - "3306:3306"
         env:
           MYSQL_ROOT_PASSWORD: root
           MYSQL_USER: ci
           MYSQL_PASSWORD: password
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK 8
-        uses: actions/setup-java@v3
-        with:
-          java-version: 8
-          distribution: 'temurin'
-          cache: "gradle"
-      - name: Connect
-        run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "show databases;"
-      - name: Create database
-        run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "create database ci_test;"
-      - name: Build with testing
-        run: ./gradlew --stacktrace :embulk-output-mysql:check
+    - uses: actions/checkout@v4
+    - name: Set up JDK 8
+      uses: actions/setup-java@v4
+      with:
+        java-version: 8
+        distribution: "zulu"
+        cache: "gradle"
+    - name: Connect
+      run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "show databases;"
+    - name: Create database
+      run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "create database ci_test;"
+    - name: Build with testing
+      run: ./gradlew --stacktrace :embulk-output-mysql:check
+      env:
+        _JAVA_OPTIONS: "-Xmx2048m -Xms512m"
+        EMBULK_OUTPUT_MYSQL_TEST_CONFIG: "${{ github.workspace }}/ci/mysql.yml"
+    - uses: actions/upload-artifact@v4
+      if: always()
+      with:
+        name: mysql5_7
+        path: embulk-output-mysql/build/reports/tests/test
+  mysql8_3:
+    runs-on: ubuntu-latest
+    # push: always run.
+    # pull_request: run only when the PR is submitted from a forked repository, not within this repository.
+    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
+    strategy:
+      fail-fast: false
+    services:
+      mysql:
+        # Testing with MySQL 8.3 here, neither with 8.4 nor 9.0, because
+        # MySQL 8.4 has disabled mysql_native_password by default.
+        # Connector/J 5.x cannot connect to MySQL 8.4 due to this.
+        # TODO: Start testing with MySQL 8.4 and/or 9.0 with Connector/J 8.x.
+        image: mysql:8.3
+        options: --health-cmd "mysqladmin ping -h localhost" --health-interval 20s --health-timeout 10s --health-retries 10
+        ports:
+        - "3306:3306"
         env:
-          _JAVA_OPTIONS: "-Xmx2048m -Xms512m"
-          EMBULK_OUTPUT_MYSQL_TEST_CONFIG: "${{ github.workspace }}/ci/mysql.yml"
-      - uses: actions/upload-artifact@v3
-        if: always()
-        with:
-          name: mysql
-          path: embulk-output-mysql/build/reports/tests/test
-  postgresql:
+          MYSQL_ROOT_PASSWORD: root
+          MYSQL_USER: ci
+          MYSQL_PASSWORD: password
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 8
+      uses: actions/setup-java@v4
+      with:
+        java-version: 8
+        distribution: "zulu"
+        cache: "gradle"
+    - name: Connect
+      run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "show databases;"
+    - name: show version
+      run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "select version();"
+    - name: Create database
+      run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "create database ci_test;"
+    # Workaround to change MySQL's password mechanism to `mysql_native_password`
+    # from `caching_sha2_password` that is the default in MySQL 8 because
+    # Connector/J 5.x does not support `caching_sha2_password`.
+    # See: https://dev.mysql.com/doc/refman/8.4/en/account-names.html
+    # TODO: Start testing with `caching_sha2_password` with Connector/J 8.x.
+    - name: Change password (root@localhost)
+      run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';"
+    - name: Change password (root@%)
+      run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'root';"
+    - name: Build with testing
+      run: ./gradlew --stacktrace :embulk-output-mysql:check
+      env:
+        _JAVA_OPTIONS: "-Xmx2048m -Xms512m"
+        EMBULK_OUTPUT_MYSQL_TEST_CONFIG: "${{ github.workspace }}/ci/mysql.yml"
+    - uses: actions/upload-artifact@v4
+      if: always()
+      with:
+        name: mysql8_3
+        path: embulk-output-mysql/build/reports/tests/test
+  postgresql9_4:
     runs-on: ubuntu-latest
     # push: always run.
     # pull_request: run only when the PR is submitted from a forked repository, not within this repository.
@@ -56,31 +110,79 @@ jobs:
         env:
           POSTGRES_PASSWORD: postgres
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK 8
-        uses: actions/setup-java@v3
-        with:
-          java-version: 8
-          distribution: 'temurin'
-          cache: "gradle"
-      - name: Connect
-        run: psql -h 127.0.0.1 -p 5432 -U postgres -d postgres -c "\l"
-        env:
-          PGPASSWORD: postgres
-      - name: Create database
-        run: psql -h 127.0.0.1 -p 5432 -U postgres -d postgres -c "create database ci_test;"
-        env:
-          PGPASSWORD: postgres
-      - name: Build with testing
-        run: ./gradlew --stacktrace :embulk-output-postgresql:check
+    - uses: actions/checkout@v4
+    - name: Set up JDK 8
+      uses: actions/setup-java@v4
+      with:
+        java-version: 8
+        distribution: "zulu"
+        cache: "gradle"
+    - name: Connect
+      run: psql -h 127.0.0.1 -p 5432 -U postgres -d postgres -c "\l"
+      env:
+        PGPASSWORD: postgres
+    - name: Create database
+      run: psql -h 127.0.0.1 -p 5432 -U postgres -d postgres -c "create database ci_test;"
+      env:
+        PGPASSWORD: postgres
+    - name: Build with testing
+      run: ./gradlew --stacktrace :embulk-output-postgresql:check
+      env:
+        _JAVA_OPTIONS: "-Xmx2048m -Xms512m"
+        EMBULK_OUTPUT_POSTGRESQL_TEST_CONFIG: "${{ github.workspace }}/ci/postgresql.yml"
+    - uses: actions/upload-artifact@v4
+      if: always()
+      with:
+        name: postgresql9_4
+        path: embulk-output-postgresql/build/reports/tests/test
+  # Testing with PostgreSQL 13 here, not with PostgreSQL 14 or later, because
+  # it raises an exception: "The authentication type 10 is not supported."
+  # TODO: Start testing with PostgreSQL 14 or later.
+  postgresql13:
+    runs-on: ubuntu-latest
+    # push: always run.
+    # pull_request: run only when the PR is submitted from a forked repository, not within this repository.
+    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
+    strategy:
+      fail-fast: false
+    services:
+      postgres:
+        image: postgres:13
+        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
+        ports:
+        - "5432:5432"
         env:
-          _JAVA_OPTIONS: "-Xmx2048m -Xms512m"
-          EMBULK_OUTPUT_POSTGRESQL_TEST_CONFIG: "${{ github.workspace }}/ci/postgresql.yml"
-      - uses: actions/upload-artifact@v3
-        if: always()
-        with:
-          name: postgresql
-          path: embulk-output-postgresql/build/reports/tests/test
+          POSTGRES_PASSWORD: postgres
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 8
+      uses: actions/setup-java@v4
+      with:
+        java-version: 8
+        distribution: "zulu"
+        cache: "gradle"
+    - name: Connect
+      run: psql -h 127.0.0.1 -p 5432 -U postgres -d postgres -c "\l"
+      env:
+        PGPASSWORD: postgres
+    - name: Show version
+      run: psql -h 127.0.0.1 -p 5432 -U postgres -d postgres -c "select * from version();"
+      env:
+        PGPASSWORD: postgres
+    - name: Create database
+      run: psql -h 127.0.0.1 -p 5432 -U postgres -d postgres -c "create database ci_test;"
+      env:
+        PGPASSWORD: postgres
+    - name: Build with testing
+      run: ./gradlew --stacktrace :embulk-output-postgresql:check
+      env:
+        _JAVA_OPTIONS: "-Xmx2048m -Xms512m"
+        EMBULK_OUTPUT_POSTGRESQL_TEST_CONFIG: "${{ github.workspace }}/ci/postgresql.yml"
+    - uses: actions/upload-artifact@v4
+      if: always()
+      with:
+        name: postgresql13
+        path: embulk-output-postgresql/build/reports/tests/test
   redshift:
     runs-on: ubuntu-latest
     # push: always run.
@@ -98,33 +200,33 @@ jobs:
         env:
           POSTGRES_PASSWORD: postgres
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK 8
-        uses: actions/setup-java@v3
-        with:
-          java-version: 8
-          distribution: 'temurin'
-          cache: "gradle"
-      - name: Connect
-        run: psql -h 127.0.0.1 -p 5439 -U postgres -d postgres -c "\l"
-        env:
-          PGPASSWORD: postgres
-      - name: Create database
-        run: psql -h 127.0.0.1 -p 5439 -U postgres -d postgres -c "create database ci_test;"
-        env:
-          PGPASSWORD: postgres
-      - name: Build with testing
-        run: ./gradlew --stacktrace :embulk-output-redshift:check
-        env:
-          _JAVA_OPTIONS: "-Xmx2048m -Xms512m"
-          EMBULK_OUTPUT_REDSHIFT_TEST_CONFIG: "${{ github.workspace }}/ci/redshift.yml"
-      - uses: actions/upload-artifact@v3
-        if: always()
-        with:
-          name: redshift
-          path: embulk-output-redshift/build/reports/tests/test
-          if-no-files-found: ignore
-  sqlserver:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 8
+      uses: actions/setup-java@v4
+      with:
+        java-version: 8
+        distribution: "zulu"
+        cache: "gradle"
+    - name: Connect
+      run: psql -h 127.0.0.1 -p 5439 -U postgres -d postgres -c "\l"
+      env:
+        PGPASSWORD: postgres
+    - name: Create database
+      run: psql -h 127.0.0.1 -p 5439 -U postgres -d postgres -c "create database ci_test;"
+      env:
+        PGPASSWORD: postgres
+    - name: Build with testing
+      run: ./gradlew --stacktrace :embulk-output-redshift:check
+      env:
+        _JAVA_OPTIONS: "-Xmx2048m -Xms512m"
+        EMBULK_OUTPUT_REDSHIFT_TEST_CONFIG: "${{ github.workspace }}/ci/redshift.yml"
+    - uses: actions/upload-artifact@v4
+      if: always()
+      with:
+        name: redshift
+        path: embulk-output-redshift/build/reports/tests/test
+        if-no-files-found: ignore
+  sqlserver: # TODO: Use https://hub.docker.com/_/microsoft-mssql-server
     runs-on: ubuntu-latest
     # push: always run.
     # pull_request: run only when the PR is submitted from a forked repository, not within this repository.
@@ -132,12 +234,12 @@ jobs:
     strategy:
       fail-fast: false
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK 8
-        uses: actions/setup-java@v3
-        with:
-          java-version: 8
-          distribution: 'temurin'
-          cache: "gradle"
-      - name: Build-only
-        run: ./gradlew --stacktrace :embulk-output-sqlserver:compileJava :embulk-output-sqlserver:compileTestJava
+    - uses: actions/checkout@v4
+    - name: Set up JDK 8
+      uses: actions/setup-java@v4
+      with:
+        java-version: 8
+        distribution: "zulu"
+        cache: "gradle"
+    - name: Build-only
+      run: ./gradlew --stacktrace :embulk-output-sqlserver:compileJava :embulk-output-sqlserver:compileTestJava