diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index e830e0bf..3b4dfd3d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -1,30 +1,129 @@
-name: Run Tests
+name: Tests
 on:
   push:
   pull_request:
-  schedule:
-    - cron: '0 5 * * *'
 
 jobs:
   test:
+    name: ${{ matrix.redmine }} ${{ matrix.db }} ruby-${{ matrix.ruby }}
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        redmine:
-          - v4.1
-          - trunk
-        ruby:
-          - v2.4
-          - v2.6
-        database:
-          - sqlite3
-          - postgres
+        ruby: ['2.6', '2.4']
+        redmine: ['4.1-stable', 'master']
+        db: ['postgres', 'mysql']
+      fail-fast: false
+
+    services:
+      postgres:
+        image: postgres:13
+        env:
+          POSTGRES_USER: postgres
+          POSTGRES_PASSWORD: postgres
+        ports:
+          - 5432:5432
+
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_USER: root
+          MYSQL_PASSWORD: ''
+          MYSQL_ALLOW_EMPTY_PASSWORD: yes
+        ports:
+          - 3306:3306
+        options: >-
+          --health-cmd="mysqladmin ping"
+          --health-interval=10s
+          --health-timeout=5s
+          --health-retries=3
 
     steps:
-      - name: Redmine plugin test
-        uses: two-pack/redmine-plugin-test-action@v2
+      - name: Verify MySQL connection from host
+        run: |
+          mysql --host 127.0.0.1 --port 3306 -uroot -e "SHOW DATABASES"
+        if: matrix.db == 'mysql'
+
+      - name: Checkout Redmine
+        uses: actions/checkout@v2
         with:
-          plugin_name: additionals
-          redmine_version: ${{ matrix.redmine }}
-          ruby_version: ${{ matrix.ruby }}
+          repository: redmine/redmine
+          ref: ${{ matrix.redmine }}
+          path: redmine
+
+      - name: Checkout additionals
+        uses: actions/checkout@v2
+        with:
+          repository: AlphaNodes/additionals
+          path: redmine/plugins/additionals
+
+      - name: Update package archives
+        run: sudo apt-get update --yes --quiet
+
+      - name: Install package dependencies
+        run: >
+          sudo apt-get install --yes --quiet
+          build-essential
+          cmake
+          libicu-dev
+          libpq-dev
+          libmysqlclient-dev
+
+      - name: Setup Ruby
+        uses: actions/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          architecture: 'x64'
+
+      - name: Setup Cache
+        uses: actions/cache@v1
+        with:
+          path: vendor
+          key: v1-ruby-${{ matrix.ruby }}-redmine-${{ matrix.redmine }}
+
+      - name: Setup Bundler
+        run: |
+          gem install bundler -v '~> 1.0'
+          bundle config path "$(pwd)/vendor/bundle"
+
+      - name: Prepare Redmine source
+        working-directory: redmine
+        run: |
+          sed -i '/rubocop/d' Gemfile
+          rm -f .rubocop*
+          cp plugins/additionals/test/support/database-${{ matrix.db }}.yml config/database.yml
+          cp plugins/additionals/test/support/configuration.yml config/configuration.yml
+
+      - name: Install Ruby dependencies
+        working-directory: redmine
+        run: |
+          bundle install --jobs=4 --retry=3 --without development
+
+      - name: Run Redmine rake tasks
+        env:
+          RAILS_ENV: test
+        working-directory: redmine
+        run: |
+          bundle exec rake generate_secret_token
+          bundle exec rake db:create db:migrate redmine:plugins:migrate
+          bundle exec rake db:test:prepare
+
+      - name: Run tests
+        env:
+          RAILS_ENV: test
+          REDMINE_VERSION: ${{ matrix.redmine }}
+        working-directory: redmine
+        run: bundle exec rake redmine:plugins:test NAME=additionals RUBYOPT="-W0"
+
+      - name: Run uninstall test
+        env:
+          RAILS_ENV: test
+          REDMINE_VERSION: ${{ matrix.redmine }}
+        working-directory: redmine
+        run: bundle exec rake redmine:plugins:migrate NAME=additionals VERSION=0
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index f826712a..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,43 +0,0 @@
-language: ruby
-os: linux
-dist: xenial
-
-rvm:
-  - 2.6.6
-  - 2.5.8
-  - 2.4.10
-
-services:
-  - mysql
-  - postgresql
-
-env:
-  - REDMINE_VER=4.1-stable DB=postgresql
-  - REDMINE_VER=master DB=postgresql
-  - REDMINE_VER=4.1-stable DB=mysql
-  - REDMINE_VER=master DB=mysql
-
-before_install:
-  - export PLUGIN_NAME=additionals
-  - export REDMINE_GIT_REPO=git://github.com/redmine/redmine.git
-  - export REDMINE_PATH=$HOME/redmine
-  - export BUNDLE_GEMFILE=$REDMINE_PATH/Gemfile
-  - export RAILS_ENV=test
-  - git clone $REDMINE_GIT_REPO $REDMINE_PATH
-  - cd $REDMINE_PATH
-  - if [[ "$REDMINE_VER" != "master" ]]; then git checkout -b $REDMINE_VER origin/$REDMINE_VER; fi
-  - sed -i '/rubocop/d' $REDMINE_PATH/Gemfile
-  - rm -f $REDMINE_PATH/.rubocop*
-  - cp $TRAVIS_BUILD_DIR/test/support/Gemfile.local $REDMINE_PATH
-  - ln -s $TRAVIS_BUILD_DIR $REDMINE_PATH/plugins/$PLUGIN_NAME
-  - cp $TRAVIS_BUILD_DIR/test/support/additional_environment.rb $REDMINE_PATH/config/
-  - cp $TRAVIS_BUILD_DIR/test/support/database-$DB-travis.yml $REDMINE_PATH/config/database.yml
-
-before_script:
-  - bundle exec rake db:create db:migrate redmine:plugins:migrate
-
-script:
-  - if [[ "$REDMINE_VER" != "master" ]] && [[ "$DB" == "postgresql" ]]; then brakeman plugins/$PLUGIN_NAME; fi
-  - if [[ "$REDMINE_VER" != "master" ]] && [[ "$DB" == "postgresql" ]]; then rubocop plugins/$PLUGIN_NAME; fi
-  - bundle exec rake redmine:plugins:test NAME=$PLUGIN_NAME RUBYOPT="-W0"
-  - bundle exec rake redmine:plugins:migrate NAME=$PLUGIN_NAME VERSION=0
diff --git a/docs/index.rst b/docs/index.rst
index b20343c0..5d76df81 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -21,8 +21,8 @@ Additionals is a `Redmine`_ plugin for customizing Redmine, providing wiki macro
    :target: https://additionals.readthedocs.io/en/latest/?badge=latest
    :alt: Documentation Status
 
-.. image:: https://travis-ci.org/AlphaNodes/additionals.svg?branch=master
-   :target: https://travis-ci.org/AlphaNodes/additionals
+.. image:: https://github.com/AlphaNodes/additionals/workflows/Tests/badge.svg
+   :target: https://github.com/AlphaNodes/additionals/actions?query=workflow%3A"Run+Tests
 
 .. image:: https://github.com/AlphaNodes/additionals/workflows/Run%20Linters/badge.svg
    :target: https://github.com/AlphaNodes/additionals/actions?query=workflow%3A%22Run+Linters%22
diff --git a/lib/additionals.rb b/lib/additionals.rb
index 2bc4f713..7fcfef71 100644
--- a/lib/additionals.rb
+++ b/lib/additionals.rb
@@ -166,6 +166,7 @@ module Additionals
     require 'emoji'
     require 'render_async'
     require 'rss'
+    require 'slim'
 
     config.after_initialize do
       # engine_name could be used (additionals_plugin), but can
diff --git a/test/support/Gemfile.local b/test/support/Gemfile.local
deleted file mode 100644
index 717c7955..00000000
--- a/test/support/Gemfile.local
+++ /dev/null
@@ -1,11 +0,0 @@
-gem 'rubocop', require: false
-gem 'rubocop-performance', require: false
-gem 'rubocop-rails', require: false
-
-gem 'brakeman'
-gem 'deface', '1.5.3'
-gem 'gemoji', '~> 3.0.0'
-gem 'render_async'
-gem 'rss'
-gem 'slim_lint'
-gem 'slim-rails'
diff --git a/test/support/additional_environment.rb b/test/support/additional_environment.rb
deleted file mode 100644
index 5ab3befa..00000000
--- a/test/support/additional_environment.rb
+++ /dev/null
@@ -1,4 +0,0 @@
-# for travis debugging
-# config.logger = Logger.new $stdout
-# config.logger.level = Logger::INFO
-# config.log_level = :info
diff --git a/test/support/configuration.yml b/test/support/configuration.yml
new file mode 100644
index 00000000..54391833
--- /dev/null
+++ b/test/support/configuration.yml
@@ -0,0 +1 @@
+# = Redmine configuration file
diff --git a/test/support/database-mysql-travis.yml b/test/support/database-mysql-travis.yml
deleted file mode 100644
index 2acc0773..00000000
--- a/test/support/database-mysql-travis.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-test:
-  adapter: mysql2
-  database: travis_ci_test
-  host: localhost
-  username: root
-  password:
-  pool: 5
-  encoding: utf8mb4
diff --git a/test/support/database-mysql.yml b/test/support/database-mysql.yml
new file mode 100644
index 00000000..160f66ca
--- /dev/null
+++ b/test/support/database-mysql.yml
@@ -0,0 +1,26 @@
+production:
+  adapter: mysql2
+  database: redmine
+  host: 127.0.0.1
+  port: 3306
+  username: root
+  password:
+  encoding: utf8mb4
+
+development:
+  adapter: mysql2
+  database: redmine
+  port: 3306
+  host: 127.0.0.1
+  username: root
+  password:
+  encoding: utf8mb4
+
+test:
+  adapter: mysql2
+  database: redmine
+  port: 3306
+  host: 127.0.0.1
+  username: root
+  password:
+  encoding: utf8mb4
diff --git a/test/support/database-postgres.yml b/test/support/database-postgres.yml
new file mode 100644
index 00000000..97802def
--- /dev/null
+++ b/test/support/database-postgres.yml
@@ -0,0 +1,23 @@
+production:
+  adapter: postgresql
+  host: localhost
+  database: redmine
+  username: postgres
+  password: postgres
+  encoding: utf8
+
+development:
+  adapter: postgresql
+  host: localhost
+  database: redmine
+  username: postgres
+  password: postgres
+  encoding: utf8
+
+test:
+  adapter: postgresql
+  host: localhost
+  database: redmine
+  username: postgres
+  password: postgres
+  encoding: utf8
diff --git a/test/support/database-postgresql-travis.yml b/test/support/database-postgresql-travis.yml
deleted file mode 100644
index f42db204..00000000
--- a/test/support/database-postgresql-travis.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-test:
-  adapter: postgresql
-  database: travis_ci_test
-  username: postgres
-  pool: 5
-  encoding: utf8