diff --git a/.github/workflows/moodle-ci.yml b/.github/workflows/moodle-ci.yml
index 5b81efe..0d27a9d 100644
--- a/.github/workflows/moodle-ci.yml
+++ b/.github/workflows/moodle-ci.yml
@@ -1,41 +1,55 @@
 name: Moodle Plugin CI
 
-on: [ push, pull_request ]
+on: [ push, pull_request, workflow_dispatch ]
 
 jobs:
   test:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     env:
       PHPUNIT_IGNORE_PATHS: 'classes/admin,classes/output,classes/privacy'
 
     services:
       postgres:
-        image: postgres:10
+        image: postgres:13
         env:
           POSTGRES_USER: 'postgres'
           POSTGRES_HOST_AUTH_METHOD: 'trust'
         ports:
           - 5432:5432
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 3
+
       mariadb:
-        image: mariadb:10.5
+        image: mariadb:10
         env:
           MYSQL_USER: 'root'
           MYSQL_ALLOW_EMPTY_PASSWORD: "true"
+          MYSQL_CHARACTER_SET_SERVER: "utf8mb4"
+          MYSQL_COLLATION_SERVER: "utf8mb4_unicode_ci"
         ports:
           - 3306:3306
         options: --health-cmd="mysqladmin ping" --health-interval 10s --health-timeout 5s --health-retries 3
 
     strategy:
+      max-parallel: 1
       fail-fast: false
       matrix:
-        php: [ '7.3', '7.4' ]
-        moodle-branch: [ 'master', 'MOODLE_311_STABLE' ]
+        php: [ '8.0', '8.1' ]
+        moodle-branch: [ 'master', 'MOODLE_402_STABLE', 'MOODLE_401_STABLE', 'MOODLE_400_STABLE' ]
         database: [ pgsql, mariadb ]
+        exclude:
+          - { moodle-branch: 'MOODLE_400_STABLE', php: '8.1' }
+        include:
+          - { moodle-branch: 'MOODLE_400_STABLE', php: '8.0' }
+          - { moodle-branch: 'MOODLE_401_STABLE', php: '8.0' }
+          - { moodle-branch: 'MOODLE_401_STABLE', php: '8.1' }
+          - { moodle-branch: 'MOODLE_402_STABLE', php: '8.0' }
+          - { moodle-branch: 'MOODLE_402_STABLE', php: '8.1' }
+          - { moodle-branch: 'master', php: '8.0' }
+          - { moodle-branch: 'master', php: '8.1' }
 
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           path: plugin
 
@@ -43,14 +57,19 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
+          extensions: ${{ matrix.extensions }}
+          ini-values: max_input_vars=5000
+          # If you are not using code coverage, keep "none". Otherwise, use "pcov" (Moodle 3.10 and up) or "xdebug".
+          # If you try to use code coverage with "none", it will fallback to phpdbg (which has known problems).
           coverage: none
 
       - name: Initialise moodle-plugin-ci
         run: |
-          composer create-project -n --no-dev --prefer-dist moodlehq/moodle-plugin-ci ci ^3
+          composer create-project -n --no-dev --prefer-dist moodlehq/moodle-plugin-ci ci ^4
           echo $(cd ci/bin; pwd) >> $GITHUB_PATH
           echo $(cd ci/vendor/bin; pwd) >> $GITHUB_PATH
           sudo locale-gen en_AU.UTF-8
+          echo "NVM_DIR=$HOME/.nvm" >> $GITHUB_ENV
 
       - name: Install moodle-plugin-ci
         run: |
@@ -72,6 +91,10 @@ jobs:
         if: ${{ always() }}
         run: moodle-plugin-ci phpmd
 
+      - name: PHP Code Sniffer
+        if: ${{ always() }}
+        run: moodle-plugin-ci phpcs
+
       - name: Moodle Code Checker
         if: ${{ always() }}
         run: moodle-plugin-ci codechecker
@@ -79,7 +102,7 @@ jobs:
       - name: Moodle PHPDoc Checker
         continue-on-error: true # This step will show errors but will not fail
         if: ${{ always() }}
-        run: moodle-plugin-ci phpdoc
+        run: moodle-plugin-ci phpdoc --max-warnings 0
 
       - name: Validating
         if: ${{ always() }}
@@ -97,7 +120,7 @@ jobs:
 
       - name: Grunt
         if: ${{ always() }}
-        run: moodle-plugin-ci grunt
+        run: moodle-plugin-ci grunt --max-lint-warnings 0
 
       - name: PHPUnit tests
         if: ${{ always() }}
@@ -111,5 +134,5 @@ jobs:
         continue-on-error: true # This step will show errors but will not fail
         env:
           COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
-        if: ${{ matrix.php == '7.4' && matrix.moodle-branch == 'MOODLE_311_STABLE' && matrix.database == 'mariadb'}}
+        if: ${{ matrix.php == '8.1' && matrix.moodle-branch == 'MOODLE_402_STABLE' && matrix.database == 'mariadb'}}
         run: moodle-plugin-ci coveralls-upload