diff --git a/.gitattributes b/.gitattributes
index 049130f7..5e43d025 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -3,7 +3,6 @@
 .editorconfig             export-ignore
 .gitattributes            export-ignore
 .gitignore                export-ignore
-.travis.yml               export-ignore
 .github                   export-ignore
 
 CONTRIBUTING.md           export-ignore
diff --git a/.github/workflows/integrationtest.yml b/.github/workflows/integrationtest.yml
new file mode 100644
index 00000000..3d847f55
--- /dev/null
+++ b/.github/workflows/integrationtest.yml
@@ -0,0 +1,180 @@
+---
+name: Integration Test
+
+on:
+  # Run on pushes to `master` and on all pull requests.
+  push:
+    branches:
+      - master
+  pull_request:
+  # Allow manually triggering the workflow.
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php: ['5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0']
+        phpcs_version: ['dev-master']
+        phpcompat: ['composer']
+        experimental: [false]
+
+        include:
+          # Ensure a "highest" PHP/PHPCS build combination for PHPCS 2.x is included.
+          - php: '5.3'
+            phpcs_version: '2.9.2'
+            phpcompat: 'composer'
+            experimental: false
+
+          # Complement the matrix with build against the lowest supported PHPCS version
+          # for each PHP version.
+          - php: '8.0'
+            # Lowest PHPCS version on which PHP 8.0 is supported.
+            phpcs_version: '3.5.7'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '7.4'
+            # Lowest PHPCS version on which PHP 7.4 is supported.
+            phpcs_version: '3.5.0'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '7.3'
+            # Lowest PHPCS version on which PHP 7.3 is supported.
+            phpcs_version: '3.3.1'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '7.2'
+            # Lowest PHPCS version on which PHP 7.2 is supported.
+            phpcs_version: '2.9.2'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '7.1'
+            phpcs_version: '2.0.0'
+            phpcompat: '^7.0'
+            experimental: false
+          - php: '7.0'
+            phpcs_version: '2.0.0'
+            phpcompat: '^7.0'
+            experimental: false
+          - php: '5.6'
+            phpcs_version: '2.0.0'
+            phpcompat: '^7.0'
+            experimental: false
+          - php: '5.5'
+            phpcs_version: '2.0.0'
+            phpcompat: '^7.0'
+            experimental: false
+          - php: '5.4'
+            phpcs_version: '2.0.0'
+            phpcompat: '^7.0'
+            experimental: false
+          - php: '5.3'
+            phpcs_version: '2.0.0'
+            phpcompat: '^7.0'
+            experimental: false
+
+          # Additional builds against arbitrary interim PHPCS versions.
+          - php: '7.3'
+            phpcs_version: '3.5.3'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '7.2'
+            phpcs_version: '3.2.3'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '7.1'
+            phpcs_version: '3.1.1'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '7.0'
+            phpcs_version: '3.4.2'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '7.0'
+            phpcs_version: '2.2.0'
+            phpcompat: '^8.0'
+            experimental: false
+          - php: '5.6'
+            phpcs_version: '3.0.2'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '5.6'
+            phpcs_version: '2.4.0'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '5.5'
+            phpcs_version: '2.6.1'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '5.4'
+            phpcs_version: '3.5.3'
+            phpcompat: 'composer'
+            experimental: false
+          - php: '5.4'
+            phpcs_version: '2.8.1'
+            phpcompat: 'composer'
+            experimental: false
+
+          # Experimental builds. These are allowed to fail.
+          - php: '8.1'
+            phpcs_version: 'dev-master'
+            phpcompat: 'composer'
+            experimental: true
+
+          - php: '8.0'
+            phpcs_version: '4.0.x-dev as 3.9.99'
+            phpcompat: 'composer'
+            experimental: true
+
+    name: "Integration test: PHP ${{ matrix.php }} - PHPCS ${{ matrix.phpcs_version }}"
+
+    continue-on-error: ${{ matrix.experimental }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          ini-values: error_reporting=E_ALL, display_errors=On
+          coverage: none
+
+      - name: 'Composer: set PHPCS version for tests'
+        run: composer require --no-update --no-scripts squizlabs/php_codesniffer:"${{ matrix.phpcs_version }}"
+
+      # Install PHPCompatibility 7.x/8.x for PHPCS < 2.3.
+      - name: 'Composer: set PHPCompatibility version for tests (PHPCS < 2.3)'
+        if: ${{ matrix.phpcompat != 'composer' }}
+        run: composer require --dev --no-update --no-scripts phpcompatibility/php-compatibility:"${{ matrix.phpcompat }}"
+
+      # Install dependencies and handle caching in one go.
+      # @link https://github.com/marketplace/actions/install-composer-dependencies
+      - name: 'Install Composer dependencies'
+        uses: "ramsey/composer-install@v1"
+        with:
+          composer-options: --no-scripts --optimize-autoloader
+
+      # Rename the PHPCompatibility directory as PHPCompatibility 7.x wasn't fully compatible with Composer yet.
+      - name: 'Rename the PHPCompatibility directory (PHPCS < 2.2)'
+        if: ${{ matrix.phpcompat == '^7.0' }}
+        run: mv ./vendor/phpcompatibility/php-compatibility ./vendor/phpcompatibility/PHPCompatibility
+
+      - name: 'Install standards'
+        run: composer install-codestandards
+
+      - name: 'Show installed standards'
+        run: vendor/bin/phpcs -i
+
+      # Test that an external standard has been registered correctly by running it against the codebase on PHPCS < 2.3.
+      - name: 'Test the PHPCompatibility standard was installed succesfully (PHPCS < 2.3)'
+        if: ${{ matrix.phpcompat != 'composer' }}
+        run: ./vendor/bin/phpcs -ps ./src/ --standard=PHPCompatibility --sniffs=PHPCompatibility.PHP.DeprecatedFunctions --runtime-set testVersion ${{ matrix.php }}
+
+      # Test that an external standard has been registered correctly by running it against the codebase.
+      - name: 'Test the PHPCompatibility standard was installed succesfully (PHPCS >= 2.3)'
+        if: ${{ matrix.phpcompat == 'composer' }}
+        run: ./vendor/bin/phpcs -ps ./src/ --standard=PHPCompatibility --sniffs=PHPCompatibility.FunctionUse.RemovedFunctions --runtime-set testVersion ${{ matrix.php }}
diff --git a/.github/workflows/linting.yaml b/.github/workflows/linting.yaml
index c40a2f87..2f5c3fda 100644
--- a/.github/workflows/linting.yaml
+++ b/.github/workflows/linting.yaml
@@ -5,6 +5,7 @@ name: Linting jobs
 on:
   - push
   - pull_request
+  - workflow_dispatch
 
 jobs:
   validate-composer:
diff --git a/.github/workflows/phplint.yml b/.github/workflows/phplint.yml
new file mode 100644
index 00000000..12c8f850
--- /dev/null
+++ b/.github/workflows/phplint.yml
@@ -0,0 +1,38 @@
+---
+name: PHP Lint
+
+# yamllint disable-line rule:truthy
+on:
+  - push
+  - pull_request
+  # Allow manually triggering the workflow.
+  - workflow_dispatch
+
+jobs:
+  phplint:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php: ['5.3', '5.6', '7.2', 'latest']
+
+    name: "PHP Lint: PHP ${{ matrix.php }}"
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          coverage: none
+          tools: cs2pr
+
+      # Install dependencies and handle caching in one go.
+      # @link https://github.com/marketplace/actions/install-composer-dependencies
+      - name: Install Composer dependencies
+        uses: "ramsey/composer-install@v1"
+
+      - name: Lint against parse errors
+        run: composer lint -- --checkstyle | cs2pr
diff --git a/.github/workflows/quicktest.yml b/.github/workflows/quicktest.yml
new file mode 100644
index 00000000..f6155942
--- /dev/null
+++ b/.github/workflows/quicktest.yml
@@ -0,0 +1,85 @@
+---
+name: Quicktest
+
+on:
+  # Run on pushes to feature branches.
+  push:
+    branches-ignore:
+      - master
+  # Allow manually triggering the workflow.
+  workflow_dispatch:
+
+jobs:
+  #### QUICK TEST STAGE ####
+  # This is a much quicker test which only runs the integration tests against a limited set of
+  # supported PHP/PHPCS combinations.
+  quicktest:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        include:
+          - php: 'latest'
+            phpcs_version: 'dev-master'
+            phpcompat: 'composer'
+          - php: '7.3'
+            phpcs_version: '2.9.2'
+            phpcompat: 'composer'
+          - php: '7.1'
+            phpcs_version: '3.3.1'
+            phpcompat: 'composer'
+          - php: '5.6'
+            phpcs_version: '2.6.0'
+            phpcompat: 'composer'
+          - php: '5.3'
+            phpcs_version: '2.0.0'
+            phpcompat: '^7.0'
+
+    name: "Quick test: PHP ${{ matrix.php }} - PHPCS ${{ matrix.phpcs_version }}"
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          ini-values: error_reporting=E_ALL, display_errors=On
+          coverage: none
+
+      - name: 'Composer: set PHPCS version for tests'
+        run: composer require --no-update --no-scripts squizlabs/php_codesniffer:"${{ matrix.phpcs_version }}"
+
+      # Install PHPCompatibility 7.x/8.x for PHPCS < 2.3.
+      - name: 'Composer: set PHPCompatibility version for tests (PHPCS < 2.3)'
+        if: ${{ matrix.phpcompat != 'composer' }}
+        run: composer require --dev --no-update --no-scripts phpcompatibility/php-compatibility:"${{ matrix.phpcompat }}"
+
+      # Install dependencies and handle caching in one go.
+      # @link https://github.com/marketplace/actions/install-composer-dependencies
+      - name: 'Install Composer dependencies'
+        uses: "ramsey/composer-install@v1"
+        with:
+          composer-options: --no-scripts --optimize-autoloader
+
+      # Rename the PHPCompatibility directory as PHPCompatibility 7.x wasn't fully compatible with Composer yet.
+      - name: 'Rename the PHPCompatibility directory (PHPCS < 2.2)'
+        if: ${{ matrix.phpcompat == '^7.0' }}
+        run: mv ./vendor/phpcompatibility/php-compatibility ./vendor/phpcompatibility/PHPCompatibility
+
+      - name: 'Install standards'
+        run: composer install-codestandards
+
+      - name: 'Show installed standards'
+        run: vendor/bin/phpcs -i
+
+      # Test that an external standard has been registered correctly by running it against the codebase on PHPCS < 2.3.
+      - name: 'Test the PHPCompatibility standard was installed succesfully (PHPCS < 2.3)'
+        if: ${{ matrix.phpcompat != 'composer' }}
+        run: ./vendor/bin/phpcs -ps ./src/ --standard=PHPCompatibility --sniffs=PHPCompatibility.PHP.DeprecatedFunctions --runtime-set testVersion ${{ matrix.php }}
+
+      # Test that an external standard has been registered correctly by running it against the codebase.
+      - name: 'Test the PHPCompatibility standard was installed succesfully (PHPCS >= 2.3)'
+        if: ${{ matrix.phpcompat == 'composer' }}
+        run: ./vendor/bin/phpcs -ps ./src/ --standard=PHPCompatibility --sniffs=PHPCompatibility.FunctionUse.RemovedFunctions --runtime-set testVersion ${{ matrix.php }}
diff --git a/.github/workflows/securitycheck.yml b/.github/workflows/securitycheck.yml
new file mode 100644
index 00000000..3800428e
--- /dev/null
+++ b/.github/workflows/securitycheck.yml
@@ -0,0 +1,42 @@
+---
+name: Security check
+
+# yamllint disable-line rule:truthy
+on:
+  - push
+  - pull_request
+  # Allow manually triggering the workflow.
+  - workflow_dispatch
+
+jobs:
+  security-check:
+    runs-on: ubuntu-latest
+    name: "Security check"
+
+    strategy:
+      matrix:
+        php: ['5.3', 'latest']
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          coverage: none
+
+      # Install dependencies and handle caching in one go.
+      # @link https://github.com/marketplace/actions/install-composer-dependencies
+      - name: Install Composer dependencies
+        uses: "ramsey/composer-install@v1"
+
+      - name: Download security checker
+        run: wget -P . https://github.com/fabpot/local-php-security-checker/releases/download/v1.0.0/local-php-security-checker_1.0.0_linux_amd64
+
+      - name: Make security checker executable
+        run: chmod +x ./local-php-security-checker_1.0.0_linux_amd64
+
+      - name: Check against insecure dependencies
+        run: ./local-php-security-checker_1.0.0_linux_amd64 --path=composer.lock
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index e67d104a..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,169 +0,0 @@
----
-language: php
-
-cache:
-  directories:
-    - "${HOME}/.composer/cache"
-    - "${HOME}/.npm/"
-
-env:
-  global:
-    - PATH="${HOME}/bin:${PATH}"
-
-jobs:
-  include:
-    - php: 7.3
-      name: Linting
-      stage: lint
-      before_install:
-        - npm set loglevel error
-        - npm set progress false
-      install:
-        - npm install -g jsonlint
-      script:
-        - find . -type f -name "*.json" -print0 | xargs -0 -n1 jsonlint -q
-        - composer validate
-
-    - stage: test
-      php: 8.0
-      env: PHPCS_VERSION="dev-master" LINT=1
-    - php: 8.0
-      # Lowest PHPCS version on which PHP 8.0 is supported.
-      env: PHPCS_VERSION="3.5.7"
-    - php: 7.4
-      env: PHPCS_VERSION="dev-master" LINT=1
-    - php: 7.4
-      # Lowest PHPCS version on which PHP 7.4 is supported.
-      env: PHPCS_VERSION="3.5.0"
-    - php: 7.3
-      env: SECURITY=1 PHPCS_VERSION="3.5.3" LINT=1 PHPCS=1
-    - php: 7.3
-      # Lowest PHPCS version on which PHP 7.3 is supported.
-      env: PHPCS_VERSION="3.3.1"
-    - php: 7.2
-      env: PHPCS_VERSION="3.2.3" LINT=1
-    - php: 7.2
-      # Lowest PHPCS version on which PHP 7.2 is supported.
-      env: PHPCS_VERSION="2.9.2"
-    - php: 7.1
-      env: PHPCS_VERSION="3.1.1" LINT=1
-    - php: 7.1
-      env: PHPCS_VERSION="2.0.0"
-    - php: 7.0
-      env: PHPCS_VERSION="3.4.2" LINT=1
-    - php: 7.0
-      env: PHPCS_VERSION="2.2.0"
-    - php: 5.6
-      env: PHPCS_VERSION="3.0.2" LINT=1
-    - php: 5.6
-      env: PHPCS_VERSION="2.4.0"
-    - php: 5.5
-      # As the latest Debian does not support PHP 5.5 anymore, we need to force using 'trusty'.
-      dist: trusty
-      env: PHPCS_VERSION="dev-master" LINT=1
-    - php: 5.5
-      # As the latest Debian does not support PHP 5.5 anymore, we need to force using 'trusty'.
-      dist: trusty
-      env: PHPCS_VERSION="2.6.1"
-    - php: 5.4
-      # As the latest Debian does not support PHP 5.4 anymore, we need to force using 'trusty'.
-      dist: trusty
-      env: PHPCS_VERSION="3.5.3" LINT=1
-    - php: 5.4
-      # As the latest Debian does not support PHP 5.4 anymore, we need to force using 'trusty'.
-      dist: trusty
-      env: PHPCS_VERSION="2.8.1"
-    - php: 5.3
-      # As the latest Debian does not support PHP 5.3 anymore, we need to force using 'precise'.
-      dist: precise
-      env: PHPCS_VERSION="2.9.2"
-    - php: 5.3
-      # As the latest Debian does not support PHP 5.3 anymore, we need to force using 'precise'.
-      dist: precise
-      env: PHPCS_VERSION="2.0.0"
-
-    - php: 7.4
-      env: PHPCS_VERSION="4.0.x-dev as 3.9.99"
-
-    - php: nightly
-      env: PHPCS_VERSION="dev-master" LINT=1
-
-  allow_failures:
-    # Allow failures for unstable builds.
-    - php: "nightly"
-    - env: PHPCS_VERSION="4.0.x-dev as 3.9.99"
-
-  fast_finish: true
-
-before_install:
-  # Speed up build time by disabling Xdebug.
-  phpenv config-rm xdebug.ini || echo 'No xdebug config.'
-
-install:
-  - composer require --no-update --no-suggest --no-scripts squizlabs/php_codesniffer:"${PHPCS_VERSION}"
-  - |
-    if [[ ${PHPCS_VERSION:0:3} < "2.2" ]]; then
-      # Install PHPCompatibility 7.x for PHPCS < 2.2.
-      composer require --no-update --no-suggest --no-scripts phpcompatibility/php-compatibility:"^7.0"
-    elif [[ ${PHPCS_VERSION:0:3} < "2.3" ]]; then
-      # Install PHPCompatibility 8.x for PHPCS 2.2 < 2.3.
-      composer require --no-update --no-suggest --no-scripts phpcompatibility/php-compatibility:"^8.0"
-    fi
-  - |
-    if [[ $TRAVIS_PHP_VERSION != "nightly" && $TRAVIS_PHP_VERSION != "8.0" ]]; then
-      travis_wait composer install \
-        --no-interaction \
-        --no-progress \
-        --no-scripts \
-        --no-suggest \
-        --optimize-autoloader \
-        --prefer-dist --verbose
-    else
-      composer require --no-update --no-suggest --no-scripts phpcompatibility/php-compatibility
-      travis_wait composer install \
-        --ignore-platform-reqs \
-        --no-dev \
-        --no-interaction \
-        --no-progress \
-        --no-scripts \
-        --no-suggest \
-        --optimize-autoloader \
-        --prefer-dist \
-        --verbose
-    fi
-  - >
-    if [[ ${PHPCS_VERSION:0:3} < "2.2" ]]; then
-      # Rename the PHPCompatibility directory as PHPCompatibility 7.x wasn't fully compatible with Composer yet.
-      mv ./vendor/phpcompatibility/php-compatibility ./vendor/phpcompatibility/PHPCompatibility
-    fi
-
-script:
-  - |
-    if [[ "$LINT" == "1" ]]; then
-      if find . -path ./vendor -prune -o -name "*.php" -exec php -l {} \; | grep "^[Parse error|Fatal error]"; then
-        exit 1
-      fi
-    fi
-  - composer install-codestandards
-  - ./vendor/bin/phpcs -i
-  - |
-    if [[ "$PHPCS" == "1" ]]; then
-      # Do the actual code style check for this repo.
-      ./vendor/bin/phpcs
-    elif [[ ${PHPCS_VERSION:0:3} < "2.3" ]]; then
-      # Test that an external standard has been registered correctly by running it against the codebase on PHPCS < 2.3.
-      ./vendor/bin/phpcs -ps ./src/ \
-        --runtime-set testVersion "${TRAVIS_PHP_VERSION:0:3}" \
-        --sniffs=PHPCompatibility.PHP.DeprecatedFunctions \
-        --standard=PHPCompatibility
-    else
-      # Test that an external standard has been registered correctly by running it against the codebase.
-      ./vendor/bin/phpcs -ps ./src/ \
-        --runtime-set testVersion "${TRAVIS_PHP_VERSION:0:3}" \
-        --sniffs=PHPCompatibility.FunctionUse.RemovedFunctions \
-        --standard=PHPCompatibility
-    fi
-  - |
-    if [[ "$SECURITY" == "1" ]]; then
-      ./vendor/bin/security-checker -n security:check
-    fi
diff --git a/README.md b/README.md
index 8d4dcf48..50faf21a 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 ![Awesome][awesome-shield]
 [![License][license-shield]](LICENSE.md)
 
-[![Travis][travis-shield]][travis]
+[![Tests][ghactionstest-shield]][ghactions]
 [![Scrutinizer][scrutinizer-shield]][scrutinizer]
 [![Latest Version on Packagist][packagist-version-shield]][packagist-version]
 [![Packagist][packagist-shield]][packagist]
@@ -255,8 +255,8 @@ THE SOFTWARE.
 [project-stage-shield]: https://img.shields.io/badge/Project%20Stage-Development-yellowgreen.svg
 [scrutinizer-shield]: https://img.shields.io/scrutinizer/g/dealerdirect/phpcodesniffer-composer-installer.svg
 [scrutinizer]: https://scrutinizer-ci.com/g/dealerdirect/phpcodesniffer-composer-installer/
-[travis-shield]: https://img.shields.io/travis/Dealerdirect/phpcodesniffer-composer-installer.svg
-[travis]: https://travis-ci.org/Dealerdirect/phpcodesniffer-composer-installer
+[ghactionstest-shield]: https://github.com/Dealerdirect/phpcodesniffer-composer-installer/actions/workflows/integrationtest.yml/badge.svg
+[ghactions]: https://github.com/Dealerdirect/phpcodesniffer-composer-installer/actions/workflows/integrationtest.yml
 [tutorial]: https://github.com/squizlabs/PHP_CodeSniffer/wiki/Coding-Standard-Tutorial
 [using-composer-plugins]: https://getcomposer.org/doc/articles/plugins.md#using-plugins
 [v0.4]: https://github.com/Dealerdirect/phpcodesniffer-composer-installer/releases/tag/v0.4.0
diff --git a/composer.json b/composer.json
index 7d637a17..f30f6c42 100644
--- a/composer.json
+++ b/composer.json
@@ -29,8 +29,8 @@
   },
   "require-dev": {
     "composer/composer": "*",
-    "enlightn/security-checker": "^1.2",
-    "phpcompatibility/php-compatibility": "^9.0"
+    "phpcompatibility/php-compatibility": "^9.0",
+    "php-parallel-lint/php-parallel-lint": "^1.3"
   },
   "minimum-stability": "dev",
   "prefer-stable": true,
@@ -45,6 +45,9 @@
   "scripts": {
     "install-codestandards": [
       "Dealerdirect\\Composer\\Plugin\\Installers\\PHPCodeSniffer\\Plugin::run"
+    ],
+    "lint": [
+      "@php ./vendor/php-parallel-lint/php-parallel-lint/parallel-lint . -e php --exclude vendor --exclude .git"
     ]
   }
 }