diff --git a/.github/workflows/coding-standard.yml b/.github/workflows/coding-standard.yml
new file mode 100644
index 0000000..fa358ed
--- /dev/null
+++ b/.github/workflows/coding-standard.yml
@@ -0,0 +1,10 @@
+name: ExtDN M2 Coding Standard
+on: [push, pull_request]
+
+jobs:
+  static:
+    name: M2 Coding Standard
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-coding-standard@master
diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
new file mode 100644
index 0000000..bffde65
--- /dev/null
+++ b/.github/workflows/integration.yml
@@ -0,0 +1,351 @@
+name: ExtDN M2 Integration Tests
+on: [ push, pull_request ]
+jobs:
+  integration-tests-2-4-4-p6-8-1:
+    name: Magento 2.4.4-p6 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.4-p6 (PHP 8.1)
+        uses: extdn/github-actions-m2/magento-integration-tests/8.1@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.4-p6'
+          composer_version: '2'
+  integration-tests-2-4-4-p6-7-4:
+    name: Magento 2.4.4-p6 PHP 7.4 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.4-p6 (PHP 7.4)
+        uses: extdn/github-actions-m2/magento-integration-tests/7.4@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.4-p6'
+          composer_version: '2'
+  integration-tests-2-4-4-p5-7-4:
+    name: Magento 2.4.4-p5 PHP 7.4 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.4-p5 (PHP 7.4)
+        uses: extdn/github-actions-m2/magento-integration-tests/7.4@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.4-p5'
+          composer_version: '2'
+  integration-tests-2-4-4-p5-8-1:
+    name: Magento 2.4.4-p5 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.4-p5 (PHP 8.1)
+        uses: extdn/github-actions-m2/magento-integration-tests/8.1@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.4-p5'
+          composer_version: '2'
+  integration-tests-2-4-5-p5-8-1:
+    name: Magento 2.4.5-p5 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.5-p5 (PHP 8.1)
+        uses: extdn/github-actions-m2/magento-integration-tests/8.1@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.5-p5'
+          composer_version: '2'
+  integration-tests-2-4-5-p5-7-4:
+    name: Magento 2.4.5-p5 PHP 7.4 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.5-p5 (PHP 7.4)
+        uses: extdn/github-actions-m2/magento-integration-tests/7.4@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.5-p5'
+          composer_version: '2'
+  integration-tests-2-4-5-p4-7-4:
+    name: Magento 2.4.5-p4 PHP 7.4 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.5-p4 (PHP 7.4)
+        uses: extdn/github-actions-m2/magento-integration-tests/7.4@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.5-p4'
+          composer_version: '2'
+  integration-tests-2-4-5-p4-8-1:
+    name: Magento 2.4.5-p4 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.5-p4 (PHP 8.1)
+        uses: extdn/github-actions-m2/magento-integration-tests/8.1@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.5-p4'
+          composer_version: '2'
+  integration-tests-2-4-6-p3-8-1:
+    name: Magento 2.4.6-p3 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.6-p3 (PHP 8.1)
+        uses: extdn/github-actions-m2/magento-integration-tests/8.1@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.6-p3'
+          composer_version: '2'
+  integration-tests-2-4-6-p3-8-2:
+    name: Magento 2.4.6-p3 PHP 8.2 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.6-p3 (PHP 8.2)
+        uses: extdn/github-actions-m2/magento-integration-tests/8.2@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.6-p3'
+          composer_version: '2'
+  integration-tests-2-4-6-p2-8-2:
+    name: Magento 2.4.6-p2 PHP 8.2 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.6-p2 (PHP 8.2)
+        uses: extdn/github-actions-m2/magento-integration-tests/8.2@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.6-p2'
+          composer_version: '2'
+  integration-tests-2-4-6-p2-8-1:
+    name: Magento 2.4.6-p2 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --tmpfs /tmp:rw --tmpfs /var/lib/mysql:rw --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+      es:
+        image: docker.io/wardenenv/elasticsearch:7.8
+        ports:
+          - 9200:9200
+        env:
+          'discovery.type': single-node
+          'xpack.security.enabled': false
+          ES_JAVA_OPTS: "-Xms64m -Xmx512m"
+        options: --health-cmd="curl localhost:9200/_cluster/health?wait_for_status=yellow&timeout=60s" --health-interval=10s --health-timeout=5s --health-retries=3
+    steps:
+      - uses: actions/checkout@v4
+      - name: M2 Integration Tests with Magento 2 Version 2.4.6-p2 (PHP 8.1)
+        uses: extdn/github-actions-m2/magento-integration-tests/8.1@master
+        with:
+          module_name: CustomGento_Invoice
+          composer_name: customgento/module-invoice-m2
+          ce_version: '2.4.6-p2'
+          composer_version: '2'
diff --git a/.github/workflows/mess-detector.yml b/.github/workflows/mess-detector.yml
new file mode 100644
index 0000000..23e9417
--- /dev/null
+++ b/.github/workflows/mess-detector.yml
@@ -0,0 +1,10 @@
+name: ExtDN M2 Mess Detector
+on: [push, pull_request]
+
+jobs:
+  phpmd:
+    name: M2 Mess Detector
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-mess-detector@master
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
new file mode 100644
index 0000000..2a81aa7
--- /dev/null
+++ b/.github/workflows/phpstan.yml
@@ -0,0 +1,12 @@
+name: ExtDN M2 PHPStan
+on: [push, pull_request]
+
+jobs:
+  phpstan:
+    name: M2 PHPStan
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-phpstan@master
+        with:
+          composer_name: customgento/module-invoice-m2
diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
new file mode 100644
index 0000000..8854bf0
--- /dev/null
+++ b/.github/workflows/unit-test.yml
@@ -0,0 +1,124 @@
+name: ExtDN M2 Unit Tests
+on: [push, pull_request]
+jobs:
+  unit-tests-2-4-4-p6-8-1:
+    name: Magento 2.4.4-p6 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    env:
+      MODULE_NAME: CustomGento_Invoice
+      COMPOSER_NAME: customgento/module-invoice-m2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-unit-tests/8.1@master
+        env:
+          MAGENTO_VERSION: '2.4.4-p6'
+  unit-tests-2-4-4-p6-7-4:
+    name: Magento 2.4.4-p6 PHP 7.4 Integration Tests
+    runs-on: ubuntu-latest
+    env:
+      MODULE_NAME: CustomGento_Invoice
+      COMPOSER_NAME: customgento/module-invoice-m2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-unit-tests/7.4@master
+        env:
+          MAGENTO_VERSION: '2.4.4-p6'
+  unit-tests-2-4-4-p5-7-4:
+    name: Magento 2.4.4-p5 PHP 7.4 Integration Tests
+    runs-on: ubuntu-latest
+    env:
+      MODULE_NAME: CustomGento_Invoice
+      COMPOSER_NAME: customgento/module-invoice-m2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-unit-tests/7.4@master
+        env:
+          MAGENTO_VERSION: '2.4.4-p5'
+  unit-tests-2-4-4-p5-8-1:
+    name: Magento 2.4.4-p5 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    env:
+      MODULE_NAME: CustomGento_Invoice
+      COMPOSER_NAME: customgento/module-invoice-m2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-unit-tests/8.1@master
+        env:
+          MAGENTO_VERSION: '2.4.4-p5'
+  unit-tests-2-4-5-p5-8-1:
+    name: Magento 2.4.5-p5 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    env:
+      MODULE_NAME: CustomGento_Invoice
+      COMPOSER_NAME: customgento/module-invoice-m2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-unit-tests/8.1@master
+        env:
+          MAGENTO_VERSION: '2.4.5-p5'
+  unit-tests-2-4-5-p5-7-4:
+    name: Magento 2.4.5-p5 PHP 7.4 Integration Tests
+    runs-on: ubuntu-latest
+    env:
+      MODULE_NAME: CustomGento_Invoice
+      COMPOSER_NAME: customgento/module-invoice-m2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-unit-tests/7.4@master
+        env:
+          MAGENTO_VERSION: '2.4.5-p5'
+  unit-tests-2-4-5-p4-7-4:
+    name: Magento 2.4.5-p4 PHP 7.4 Integration Tests
+    runs-on: ubuntu-latest
+    env:
+      MODULE_NAME: CustomGento_Invoice
+      COMPOSER_NAME: customgento/module-invoice-m2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-unit-tests/7.4@master
+        env:
+          MAGENTO_VERSION: '2.4.5-p4'
+  unit-tests-2-4-5-p4-8-1:
+    name: Magento 2.4.5-p4 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    env:
+      MODULE_NAME: CustomGento_Invoice
+      COMPOSER_NAME: customgento/module-invoice-m2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-unit-tests/8.1@master
+        env:
+          MAGENTO_VERSION: '2.4.5-p4'
+  unit-tests-2-4-6-p3-8-1:
+    name: Magento 2.4.6-p3 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    env:
+      MODULE_NAME: CustomGento_Invoice
+      COMPOSER_NAME: customgento/module-invoice-m2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-unit-tests/8.1@master
+        env:
+          MAGENTO_VERSION: '2.4.6-p3'
+  unit-tests-2-4-6-p3-8-2:
+    name: Magento 2.4.6-p3 PHP 8.2 Integration Tests
+    runs-on: ubuntu-latest
+    env:
+      MODULE_NAME: CustomGento_Invoice
+      COMPOSER_NAME: customgento/module-invoice-m2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-unit-tests/8.2@master
+        env:
+          MAGENTO_VERSION: '2.4.6-p3'
+  unit-tests-2-4-6-p2-8-1:
+    name: Magento 2.4.6-p2 PHP 8.1 Integration Tests
+    runs-on: ubuntu-latest
+    env:
+      MODULE_NAME: CustomGento_Invoice
+      COMPOSER_NAME: customgento/module-invoice-m2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extdn/github-actions-m2/magento-unit-tests/8.1@master
+        env:
+          MAGENTO_VERSION: '2.4.6-p2'
diff --git a/Plugin/OfflinePayments/Model/Purchaseorder/AddAdminCheckPlugin.php b/Plugin/OfflinePayments/Model/Purchaseorder/AddAdminCheckPlugin.php
index ddc26fc..9e393d1 100644
--- a/Plugin/OfflinePayments/Model/Purchaseorder/AddAdminCheckPlugin.php
+++ b/Plugin/OfflinePayments/Model/Purchaseorder/AddAdminCheckPlugin.php
@@ -27,6 +27,9 @@ public function __construct(Config $config, State $state)
         $this->state  = $state;
     }
 
+    /**
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
     public function afterIsAvailable(Purchaseorder $subject, bool $result): bool
     {
         // if some other rule forbids this payment method, we forbid it as well
diff --git a/Plugin/OfflinePayments/Model/Purchaseorder/AddCustomerGroupCheckPlugin.php b/Plugin/OfflinePayments/Model/Purchaseorder/AddCustomerGroupCheckPlugin.php
index f74f3c3..18e4487 100644
--- a/Plugin/OfflinePayments/Model/Purchaseorder/AddCustomerGroupCheckPlugin.php
+++ b/Plugin/OfflinePayments/Model/Purchaseorder/AddCustomerGroupCheckPlugin.php
@@ -20,6 +20,9 @@ public function __construct(Config $config)
         $this->config = $config;
     }
 
+    /**
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
     public function afterIsAvailable(Purchaseorder $subject, bool $result, CartInterface $quote = null): bool
     {
         // if some other rule forbids this payment method, we forbid it as well
diff --git a/Test/Integration/PurchaseorderTest.php b/Test/Integration/PurchaseorderTest.php
index 8d2fd50..b2cb611 100644
--- a/Test/Integration/PurchaseorderTest.php
+++ b/Test/Integration/PurchaseorderTest.php
@@ -27,7 +27,7 @@ class PurchaseorderTest extends TestCase
      */
     private $quote;
 
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->objectManager = Bootstrap::getObjectManager();
         $this->paymentMethod = $this->objectManager->get(Purchaseorder::class);
diff --git a/Test/Unit/Model/ConfigTest.php b/Test/Unit/Model/ConfigTest.php
index d53106a..8ddb87e 100644
--- a/Test/Unit/Model/ConfigTest.php
+++ b/Test/Unit/Model/ConfigTest.php
@@ -21,7 +21,7 @@ class ConfigTest extends TestCase
      */
     private $config;
 
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->scopeConfig = $this->createMock(ScopeConfigInterface::class);
         $this->config      = new Config($this->scopeConfig);