diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..3c59690
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,265 @@
+on:
+  pull_request:
+  schedule:
+    - cron:  "0 0 * * *"
+
+concurrency:
+  group: ${{ github.head_ref || 'cron' }}
+  cancel-in-progress: true
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-version:
+          - '8.1'
+          - '8.0'
+          - '7.4'
+          - '7.3'
+          - '7.2'
+          - '7.1'
+          - '7.0'
+        phpunit-version:
+          - '9.5.0'
+          - '9.4.0'
+          - '9.3.0'
+          - '9.2.0'
+          - '9.1.0'
+          - '9.0.0'
+          - '8.4.0'
+          - '8.3.0'
+          - '8.2.0'
+          - '8.1.0'
+          - '8.0.0'
+          - '7.5.0'
+          - '7.4.0'
+          - '7.3.0'
+          - '7.2.0'
+          - '7.1.0'
+          - '7.0.0'
+          - '6.5.0'
+          - '6.4.0'
+          - '6.3.0'
+          - '6.2.0'
+          - '6.1.0'
+          - '6.0.0'
+
+        exclude:
+          # PHP 8.1 Exclusions
+          - php-version: '8.1'
+            phpunit-version: '9.4.0'
+          - php-version: '8.1'
+            phpunit-version: '9.3.0'
+          - php-version: '8.1'
+            phpunit-version: '9.2.0'
+          - php-version: '8.1'
+            phpunit-version: '9.1.0'
+          - php-version: '8.1'
+            phpunit-version: '9.0.0'
+          - php-version: '8.1'
+            phpunit-version: '8.4.0'
+          - php-version: '8.1'
+            phpunit-version: '8.3.0'
+          - php-version: '8.1'
+            phpunit-version: '8.2.0'
+          - php-version: '8.1'
+            phpunit-version: '8.1.0'
+          - php-version: '8.1'
+            phpunit-version: '8.0.0'
+          - php-version: '8.1'
+            phpunit-version: '7.5.0'
+          - php-version: '8.1'
+            phpunit-version: '7.4.0'
+          - php-version: '8.1'
+            phpunit-version: '7.3.0'
+          - php-version: '8.1'
+            phpunit-version: '7.2.0'
+          - php-version: '8.1'
+            phpunit-version: '7.1.0'
+          - php-version: '8.1'
+            phpunit-version: '7.0.0'
+          - php-version: '8.1'
+            phpunit-version: '6.5.0'
+          - php-version: '8.1'
+            phpunit-version: '6.4.0'
+          - php-version: '8.1'
+            phpunit-version: '6.3.0'
+          - php-version: '8.1'
+            phpunit-version: '6.2.0'
+          - php-version: '8.1'
+            phpunit-version: '6.1.0'
+          - php-version: '8.1'
+            phpunit-version: '6.0.0'
+
+          # PHP 8.0 Exclusions
+          - php-version: '8.0'
+            phpunit-version: '9.2.0'
+          - php-version: '8.0'
+            phpunit-version: '9.1.0'
+          - php-version: '8.0'
+            phpunit-version: '9.0.0'
+          - php-version: '8.0'
+            phpunit-version: '8.4.0'
+          - php-version: '8.0'
+            phpunit-version: '8.3.0'
+          - php-version: '8.0'
+            phpunit-version: '8.2.0'
+          - php-version: '8.0'
+            phpunit-version: '8.1.0'
+          - php-version: '8.0'
+            phpunit-version: '8.0.0'
+          - php-version: '8.0'
+            phpunit-version: '7.5.0'
+          - php-version: '8.0'
+            phpunit-version: '7.4.0'
+          - php-version: '8.0'
+            phpunit-version: '7.3.0'
+          - php-version: '8.0'
+            phpunit-version: '7.2.0'
+          - php-version: '8.0'
+            phpunit-version: '7.1.0'
+          - php-version: '8.0'
+            phpunit-version: '7.0.0'
+          - php-version: '8.0'
+            phpunit-version: '6.5.0'
+          - php-version: '8.0'
+            phpunit-version: '6.4.0'
+          - php-version: '8.0'
+            phpunit-version: '6.3.0'
+          - php-version: '8.0'
+            phpunit-version: '6.2.0'
+          - php-version: '8.0'
+            phpunit-version: '6.1.0'
+          - php-version: '8.0'
+            phpunit-version: '6.0.0'
+            
+          # PHP 7.4 Exclusions
+          - php-version: '7.4'
+            phpunit-version: '8.1.0'
+          - php-version: '7.4'
+            phpunit-version: '8.0.0'
+          - php-version: '7.4'
+            phpunit-version: '7.4.0'
+          - php-version: '7.4'
+            phpunit-version: '7.3.0'
+          - php-version: '7.4'
+            phpunit-version: '7.2.0'
+          - php-version: '7.4'
+            phpunit-version: '7.1.0'
+          - php-version: '7.4'
+            phpunit-version: '7.0.0'
+          - php-version: '7.4'
+            phpunit-version: '6.5.0'
+          - php-version: '7.4'
+            phpunit-version: '6.4.0'
+          - php-version: '7.4'
+            phpunit-version: '6.3.0'
+          - php-version: '7.4'
+            phpunit-version: '6.2.0'
+          - php-version: '7.4'
+            phpunit-version: '6.1.0'
+          - php-version: '7.4'
+            phpunit-version: '6.0.0'
+          
+          # PHP 7.2 Exclusions
+          - php-version: '7.2'
+            phpunit-version: '9.5.0'
+          - php-version: '7.2'
+            phpunit-version: '9.4.0'
+          - php-version: '7.2'
+            phpunit-version: '9.3.0'
+          - php-version: '7.2'
+            phpunit-version: '9.2.0'
+          - php-version: '7.2'
+            phpunit-version: '9.1.0'
+          - php-version: '7.2'
+            phpunit-version: '9.0.0'
+          
+          # PHP 7.1 Exclusions
+          - php-version: '7.1'
+            phpunit-version: '9.5.0'
+          - php-version: '7.1'
+            phpunit-version: '9.4.0'
+          - php-version: '7.1'
+            phpunit-version: '9.3.0'
+          - php-version: '7.1'
+            phpunit-version: '9.2.0'
+          - php-version: '7.1'
+            phpunit-version: '9.1.0'
+          - php-version: '7.1'
+            phpunit-version: '9.0.0'
+          - php-version: '7.1'
+            phpunit-version: '8.5.0'
+          - php-version: '7.1'
+            phpunit-version: '8.4.0'
+          - php-version: '7.1'
+            phpunit-version: '8.3.0'
+          - php-version: '7.1'
+            phpunit-version: '8.2.0'
+          - php-version: '7.1'
+            phpunit-version: '8.1.0'
+          - php-version: '7.1'
+            phpunit-version: '8.0.0'
+      
+          # PHP 7.0 Exclusions
+          - php-version: '7.0'
+            phpunit-version: '9.5.0'
+          - php-version: '7.0'
+            phpunit-version: '9.4.0'
+          - php-version: '7.0'
+            phpunit-version: '9.3.0'
+          - php-version: '7.0'
+            phpunit-version: '9.2.0'
+          - php-version: '7.0'
+            phpunit-version: '9.1.0'
+          - php-version: '7.0'
+            phpunit-version: '9.0.0'
+          - php-version: '7.0'
+            phpunit-version: '8.5.0'
+          - php-version: '7.0'
+            phpunit-version: '8.4.0'
+          - php-version: '7.0'
+            phpunit-version: '8.3.0'
+          - php-version: '7.0'
+            phpunit-version: '8.2.0'
+          - php-version: '7.0'
+            phpunit-version: '8.1.0'
+          - php-version: '7.0'
+            phpunit-version: '8.0.0'
+          - php-version: '7.0'
+            phpunit-version: '7.5.0'
+          - php-version: '7.0'
+            phpunit-version: '7.4.0'
+          - php-version: '7.0'
+            phpunit-version: '7.3.0'
+          - php-version: '7.0'
+            phpunit-version: '7.2.0'
+          - php-version: '7.0'
+            phpunit-version: '7.1.0'
+          - php-version: '7.0'
+            phpunit-version: '7.0.0'
+
+    name: PHPUnit ${{ matrix.phpunit-version }} on PHP ${{ matrix.php-version }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          ref: ${{ github.head_ref }}
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+
+      - name: Install Dependencies
+        run: composer require phpunit/phpunit:~${{ matrix.phpunit-version }} squizlabs/php_codesniffer phpmd/phpmd
+
+      - name: PHPUnit
+        run: vendor/bin/phpunit
+
+      - name: PHPCS
+        run: vendor/bin/phpcs --standard=PSR2 classes/ tests/
+
+      - name: PHPMD
+        run: vendor/bin/phpmd classes/ text cleancode,codesize,controversial,design,naming,unusedcode
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 3e4a54a..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,250 +0,0 @@
-language: php
-
-cache:
-  directories:
-    - $HOME/.composer/cache
-
-env:
-  - PHPUNIT_VERSION=dev-master
-  - PHPUNIT_VERSION=~9.5.0
-  - PHPUNIT_VERSION=~9.4.0
-  - PHPUNIT_VERSION=~9.3.0
-  - PHPUNIT_VERSION=~9.2.0
-  - PHPUNIT_VERSION=~9.1.0
-  - PHPUNIT_VERSION=~9.0.0
-  - PHPUNIT_VERSION=~8.5.0
-  - PHPUNIT_VERSION=~8.4.0
-  - PHPUNIT_VERSION=~8.3.0
-  - PHPUNIT_VERSION=~8.2.0
-  - PHPUNIT_VERSION=~8.1.0
-  - PHPUNIT_VERSION=~8.0.0
-  - PHPUNIT_VERSION=~7.5.0
-  - PHPUNIT_VERSION=~7.4.0
-  - PHPUNIT_VERSION=~7.3.0
-  - PHPUNIT_VERSION=~7.2.0
-  - PHPUNIT_VERSION=~7.1.0
-  - PHPUNIT_VERSION=~7.0.0
-  - PHPUNIT_VERSION=~6.5.0
-  - PHPUNIT_VERSION=~6.4.0
-  - PHPUNIT_VERSION=~6.3.0
-  - PHPUNIT_VERSION=~6.2.0
-  - PHPUNIT_VERSION=~6.1.0
-  - PHPUNIT_VERSION=~6.0.0
-
-php:
-  - 8.1
-  - 8.0
-  - 7.4
-  - 7.3
-  - 7.2
-  - 7.1
-  - 7.0
-
-matrix:
-  fast_finish: true
-  exclude:
-    - php: 8.1
-      env: PHPUNIT_VERSION=~9.4.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~9.3.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~9.2.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~9.1.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~9.0.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~8.4.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~8.3.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~8.2.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~8.1.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~8.0.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~7.5.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~7.4.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~7.3.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~7.2.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~7.1.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~7.0.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~6.5.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~6.4.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~6.3.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~6.2.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~6.1.0
-    - php: 8.1
-      env: PHPUNIT_VERSION=~6.0.0
-  
-    - php: 8.0
-      env: PHPUNIT_VERSION=~9.2.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~9.1.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~9.0.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~8.4.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~8.3.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~8.2.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~8.1.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~8.0.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~7.5.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~7.4.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~7.3.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~7.2.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~7.1.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~7.0.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~6.5.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~6.4.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~6.3.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~6.2.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~6.1.0
-    - php: 8.0
-      env: PHPUNIT_VERSION=~6.0.0
-
-    - php: 7.4
-      env: PHPUNIT_VERSION=~8.1.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~8.0.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~7.4.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~7.3.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~7.2.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~7.1.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~7.0.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~6.5.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~6.4.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~6.3.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~6.2.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~6.1.0
-    - php: 7.4
-      env: PHPUNIT_VERSION=~6.0.0
-
-    - php: 7.2
-      env: PHPUNIT_VERSION=dev-master
-    - php: 7.2
-      env: PHPUNIT_VERSION=~9.5.0
-    - php: 7.2
-      env: PHPUNIT_VERSION=~9.4.0
-    - php: 7.2
-      env: PHPUNIT_VERSION=~9.3.0
-    - php: 7.2
-      env: PHPUNIT_VERSION=~9.2.0
-    - php: 7.2
-      env: PHPUNIT_VERSION=~9.1.0
-    - php: 7.2
-      env: PHPUNIT_VERSION=~9.0.0
-
-    - php: 7.1
-      env: PHPUNIT_VERSION=dev-master
-    - php: 7.1
-      env: PHPUNIT_VERSION=~9.5.0
-    - php: 7.1
-      env: PHPUNIT_VERSION=~9.4.0
-    - php: 7.1
-      env: PHPUNIT_VERSION=~9.3.0
-    - php: 7.1
-      env: PHPUNIT_VERSION=~9.2.0
-    - php: 7.1
-      env: PHPUNIT_VERSION=~9.1.0
-    - php: 7.1
-      env: PHPUNIT_VERSION=~9.0.0
-    - php: 7.1
-      env: PHPUNIT_VERSION=~8.5.0
-    - php: 7.1
-      env: PHPUNIT_VERSION=~8.4.0
-    - php: 7.1
-      env: PHPUNIT_VERSION=~8.3.0
-    - php: 7.1
-      env: PHPUNIT_VERSION=~8.2.0
-    - php: 7.1
-      env: PHPUNIT_VERSION=~8.1.0
-    - php: 7.1
-      env: PHPUNIT_VERSION=~8.0.0
-
-    - php: 7.0
-      env: PHPUNIT_VERSION=dev-master
-    - php: 7.0
-      env: PHPUNIT_VERSION=~9.5.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~9.4.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~9.3.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~9.2.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~9.1.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~9.0.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~8.5.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~8.4.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~8.3.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~8.2.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~8.1.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~8.0.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~7.5.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~7.4.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~7.3.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~7.2.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~7.1.0
-    - php: 7.0
-      env: PHPUNIT_VERSION=~7.0.0
-  allow_failures:
-    - env: PHPUNIT_VERSION=dev-master
-
-install:
-  - composer require phpunit/phpunit:${PHPUNIT_VERSION}
-  - composer require squizlabs/php_codesniffer
-  - composer require phpmd/phpmd
-
-script:
-  - vendor/bin/phpunit
-  - vendor/bin/phpcs --standard=PSR2 classes/ tests/
-  - vendor/bin/phpmd classes/ text cleancode,codesize,controversial,design,naming,unusedcode
diff --git a/README.md b/README.md
index 74d273e..016a872 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,11 @@
+[![.github/workflows/tests.yml](https://github.com/php-mock/php-mock-phpunit/actions/workflows/tests.yml/badge.svg)](https://github.com/php-mock/php-mock-phpunit/actions/workflows/tests.yml)
+
 # Mock PHP built-in functions with PHPUnit
 
 This package integrates the function mock library
 [PHP-Mock](https://github.com/php-mock/php-mock) with PHPUnit.
 
-# Installation
+## Installation
 
 Use [Composer](https://getcomposer.org/):
 
@@ -11,7 +13,7 @@ Use [Composer](https://getcomposer.org/):
 composer require --dev php-mock/php-mock-phpunit
 ```
 
-# Usage
+## Usage
 
 PHP-Mock integrates with the trait
 [`PHPMock`](http://php-mock.github.io/php-mock-phpunit/api/class-phpmock.phpunit.PHPMock.html)
@@ -22,8 +24,6 @@ With this method you can build a mock in the way you are used to build a
 PHPUnit mock:
 
 ```php
-<?php
-
 namespace foo;
 
 class BuiltinTest extends \PHPUnit\Framework\TestCase
@@ -60,7 +60,7 @@ class BuiltinTest extends \PHPUnit\Framework\TestCase
 There's no need to disable the mocked function. The PHPUnit integration does
 that for you.
 
-## Restrictions
+### Restrictions
 
 This library comes with the same restrictions as the underlying
 [`php-mock`](https://github.com/php-mock/php-mock#requirements-and-restrictions):
@@ -77,15 +77,12 @@ This library comes with the same restrictions as the underlying
   This would define a side effectless namespaced function. Another effective
   approach is running your test in an isolated process (e.g. with `@runInSeparateProcess`).
 
-# License and authors
+## License and authors
 
 This project is free and under the WTFPL.
 Responsable for this project is Markus Malkusch markus@malkusch.de.
 
-## Donations
+### Donations
 
 If you like this project and feel generous donate a few Bitcoins here:
 [1335STSwu9hST4vcMRppEPgENMHD2r1REK](bitcoin:1335STSwu9hST4vcMRppEPgENMHD2r1REK)
-
-[![Build Status](https://travis-ci.org/php-mock/php-mock-phpunit.svg?branch=master)](https://travis-ci.org/php-mock/php-mock-phpunit)
-