diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
new file mode 100644
index 0000000..3198dc9
--- /dev/null
+++ b/.github/workflows/phpstan.yml
@@ -0,0 +1,47 @@
+name: PHPStan
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  tests:
+    name: PHP ${{ matrix.php-versions }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php-versions: ['7.3', '7.4']
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Set up PHP ${{ matrix.php-versions }}
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php-versions }}
+        extensions: mbstring
+        tools: cs2pr, phpstan:0.12.9
+
+    - name: Validate composer.json and composer.lock
+      run: composer validate
+
+    - name: Get Composer Cache Directory
+      id: composer-cache
+      run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+    - name: Cache dependencies
+      uses: actions/cache@v1
+      with:
+        path: ${{ steps.composer-cache.outputs.dir }}
+        key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+        restore-keys: ${{ runner.os }}-composer-
+
+    - name: Install dependencies
+      run: composer install --prefer-dist --no-progress --no-suggest
+
+    - name: PHPStan
+      run: phpstan analyse --error-format=checkstyle | cs2pr
diff --git a/.github/workflows/runTests.yml b/.github/workflows/runTests.yml
new file mode 100644
index 0000000..43b7db4
--- /dev/null
+++ b/.github/workflows/runTests.yml
@@ -0,0 +1,66 @@
+name: Tests
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  tests:
+    name: PHP ${{ matrix.php-versions }} on ${{ matrix.os }} w/ ${{ matrix.dependencies }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        php-versions: ['7.3', '7.4']
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        dependencies: ['install', 'update --prefer-lowest', 'update']
+
+    steps:
+    - name: Configure git
+      if: runner.os == 'Windows'
+      run: git config --system core.autocrlf false; git config --system core.eol lf
+
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Set up PHP ${{ matrix.php-versions }}
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php-versions }}
+        extensions: mbstring
+        coverage: xdebug
+
+    - name: Setup Problem Matchers for PHP
+      run: echo "::add-matcher::${{ runner.tool_cache }}/php.json"
+
+    - name: Setup Problem Matchers for PHPUnit
+      run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
+
+    - name: Validate composer.json and composer.lock
+      run: composer validate
+
+    - name: Get Composer Cache Directory
+      id: composer-cache
+      run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+    - name: Cache dependencies
+      uses: actions/cache@v1
+      with:
+        path: ${{ steps.composer-cache.outputs.dir }}
+        key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+        restore-keys: ${{ runner.os }}-composer-
+
+    - name: Install dependencies
+      run: composer ${{ matrix.dependencies }} --prefer-dist --no-progress --no-suggest
+
+    - name: Run test suite
+      run: composer run-script test -- --coverage-text
+
+    - name: Notify Coveralls
+      env:
+        COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+      run: |
+        composer require php-coveralls/php-coveralls
+        composer run-script php-coveralls -- --verbose
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 2c159c4..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-language: php
-
-php:
-  - 7.3
-  - 7.4
-  - 7.4snapshot
-  - nightly
-
-matrix:
-  fast_finish: true
-  allow_failures:
-    - php: nightly
-    - php: 7.4snapshot
-
-install:
-  - composer install
-  - curl -L https://github.com/phpstan/phpstan/releases/download/0.12.9/phpstan.phar -o phpstan
-  - chmod +x phpstan
-
-script:
-  - vendor/bin/phpunit --coverage-text
-  - ./phpstan analyse
-
-after_success:
-  - composer require php-coveralls/php-coveralls
-  - travis_retry vendor/bin/php-coveralls
diff --git a/README.md b/README.md
index b631ad1..5383042 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,8 @@ Provides assertions for unit tests.
 Package status
 --------------
 
-[![Build Status](https://secure.travis-ci.org/bovigo/assert.png)](http://travis-ci.org/bovigo/assert) [![Build Status Windows](https://ci.appveyor.com/api/projects/status/t1u7ylbvdkbqqxyv?svg=true)](https://ci.appveyor.com/project/mikey179/assert) [![Coverage Status](https://coveralls.io/repos/github/bovigo/assert/badge.svg?branch=master)](https://coveralls.io/github/bovigo/assert?branch=master)
+
+![Build Status](https://github.com/bovigo/assert/workflows/Tests/badge.svg) [![Coverage Status](https://coveralls.io/repos/github/bovigo/assert/badge.svg?branch=master)](https://coveralls.io/github/bovigo/assert?branch=master)
 
 [![Latest Stable Version](https://poser.pugx.org/bovigo/assert/version.png)](https://packagist.org/packages/bovigo/assert) [![Latest Unstable Version](https://poser.pugx.org/bovigo/assert/v/unstable.png)](//packagist.org/packages/bovigo/assert)
 
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index d15d81c..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-build: false
-shallow_clone: true
-
-cache:
-  - .\php -> appveyor.yml
-  - vendor -> composer.lock
-
-init:
-  - set PATH=%PATH%;.\php
-  - set COMPOSER_NO_INTERACTION=1
-  - set CACHED=0
-
-install:
-  - if exist .\php (set CACHED=1) else (mkdir .\php)
-  - if %CACHED%==0 cd .\php
-  - if %CACHED%==0 curl --fail --location --silent --show-error -o php.zip https://windows.php.net/downloads/releases/archives/php-7.3.11-nts-Win32-VC15-x64.zip
-  - if %CACHED%==0 appveyor DownloadFile https://getcomposer.org/composer.phar
-  - if %CACHED%==0 7z x php.zip -y
-  - if %CACHED%==0 copy php.ini-production php.ini /Y
-  - if %CACHED%==0 echo date.timezone="Europe/Berlin" >> php.ini
-  - if %CACHED%==0 echo extension_dir=ext >> php.ini
-  - if %CACHED%==0 echo extension=php_openssl.dll >> php.ini
-  - if %CACHED%==0 echo extension=php_mbstring.dll >> php.ini
-  - if %CACHED%==0 cd ..
-
-test_script:
-  - php .\php\composer.phar install
-  - vendor/bin/phpunit.bat --coverage-text
diff --git a/composer.json b/composer.json
index 421d454..981b242 100644
--- a/composer.json
+++ b/composer.json
@@ -31,5 +31,9 @@
         }
     },
     "minimum-stability": "dev",
-    "prefer-stable": true
+    "prefer-stable": true,
+    "scripts": {
+        "test": "phpunit",
+        "php-coveralls": "php-coveralls"
+    }
 }