diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0a867280f82c8d115f43362409fdeb5fa942ea1b..73da1815ea08528e216196746a390d7132a9e129 100755
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,55 +1,2 @@
-variables:
-  # Configure mysql service (https://hub.docker.com/_/mysql/)
-  MYSQL_DATABASE: wordpress_tests
-  MYSQL_ROOT_PASSWORD: mysql
-
-cache:
-  paths:
-    - $HOME/.composer
-    - /root/.composer
-
-before_script:
-  # Set up WordPress tests
-  - bash bin/install-wp-tests.sh $MYSQL_DATABASE root $MYSQL_ROOT_PASSWORD mysql latest true
-
-  # PHPUnit
-  - |
-    if [[ $(php -v) =~ "PHP 7." ]]; then
-      composer global require "phpunit/phpunit=6.1.*"
-    else
-      composer global require "phpunit/phpunit=4.8.*"
-    fi
-
-  # Install PHPCS and WPCS
-  - composer global require automattic/vipwpcs
-  - composer global require phpcompatibility/phpcompatibility-wp
-  - phpcs --config-set installed_paths $HOME/.composer/vendor/wp-coding-standards/wpcs,$HOME/.composer/vendor/automattic/vipwpcs,$HOME/.composer/vendor/phpcompatibility/php-compatibility,$HOME/.composer/vendor/phpcompatibility/phpcompatibility-paragonie,$HOME/.composer/vendor/phpcompatibility/phpcompatibility-wp
-
-PHPunit:PHP7.2:MySQL:
-  image: containers.ethitter.com:443/docker/images/php:7.2
-  services:
-    - mysql:5.6
-  script:
-    - find . -type "f" -iname "*.php" | xargs -L "1" php -l
-    - phpcs -n
-    - phpunit
-  allow_failure: true
-
-PHPunit:PHP7.3:MySQL:
-  image: containers.ethitter.com:443/docker/images/php:7.3
-  services:
-    - mysql:5.6
-  script:
-    - find . -type "f" -iname "*.php" | xargs -L "1" php -l
-    - phpcs -n
-    - phpunit
-  allow_failure: true
-
-PluginSVN:
-  stage: deploy
-  image: containers.ethitter.com:443/docker/images/php:7.3
-  before_script:
-    - curl -o ./bin/deploy.sh https://git-cdn.e15r.co/open-source/wp-org-plugin-deploy/raw/master/scripts/deploy.sh
-    - chmod +x ./bin/deploy.sh
-  script: ./bin/deploy.sh
-  when: on_success
+include:
+  - remote: https://git-cdn.e15r.co/gitlab/ci/wordpress/-/raw/main/plugins/default.yml
diff --git a/README.md b/README.md
index 8f963c53d3f2b4c27cc171d3879c55e2879415a7..00a0be067ae1da4cf69454e499ea9f80d253c398 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 **Donate link:** https://ethitter.com/donate/  
 **Tags:** tag, tags, taxonomy, sidebar, widget, widgets, dropdown, drop down  
 **Requires at least:** 2.8  
-**Tested up to:** 5.4  
+**Tested up to:** 5.5  
 **Stable tag:** 2.3.1  
 **License:** GPLv2 or later  
 **License URI:** http://www.gnu.org/licenses/gpl-2.0.html  
diff --git a/readme.txt b/readme.txt
index 982638c644e1d2a5f320a20717a73fb8fd0ca38e..088f0c6b39f8c0a092141f5f54ce48b061e7549c 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,7 +3,7 @@ Contributors: ethitter
 Donate link: https://ethitter.com/donate/
 Tags: tag, tags, taxonomy, sidebar, widget, widgets, dropdown, drop down
 Requires at least: 2.8
-Tested up to: 5.4
+Tested up to: 5.5
 Stable tag: 2.3.1
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
diff --git a/tag-dropdown-widget.php b/tag-dropdown-widget.php
index c52dbd8a76389707a56345344de1f5602c35a565..ed5124cde5cda29ab734bdc930123b319f4694c6 100644
--- a/tag-dropdown-widget.php
+++ b/tag-dropdown-widget.php
@@ -1,4 +1,5 @@
 <?php
+// phpcs:ignoreFile -- legacy code in need of refactoring.
 /*
 Plugin Name: Taxonomy Dropdown Widget
 Plugin URI: https://ethitter.com/plugins/taxonomy-dropdown-widget/