diff --git a/.travis.yml b/.travis.yml
index a4aec7f..30be35b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,15 +1,29 @@
 language: php
 
 php:
-  - 5.3
+# - 5.3 # requires old distro, see below
   - 5.4
   - 5.5
   - 5.6
-  - 7
-  - hhvm
+  - 7.0
+  - 7.1
+  - 7.2
+  - hhvm # ignore errors, see below
+
+# lock distro so future defaults will not break the build
+dist: trusty
+
+matrix:
+  include:
+    - php: 5.3
+      dist: precise
+  allow_failures:
+    - php: hhvm
+
+sudo: false
 
 install:
-  - composer install --prefer-source --no-interaction
+  - composer install --no-interaction
 
 script:
-  - phpunit --coverage-text
+  - vendor/bin/phpunit --coverage-text
diff --git a/README.md b/README.md
index 21d6ae9..9aa94f4 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,7 @@ Among others, multicast networking is the basis for:
     * [createReceiver()](#createreceiver)
   * [Socket](#socket)
 * [Install](#install)
+* [Tests](#tests)
 * [License](#license)
 
 ## Quickstart example
@@ -134,6 +135,26 @@ The recommended way to install this library is [through Composer](http://getcomp
 $ composer require clue/multicast-react:~1.0
 ```
 
+This project aims to run on any platform and thus does not require any PHP
+extensions and supports running on legacy PHP 5.3 through current PHP 7+ and
+HHVM.
+It's *highly recommended to use PHP 7+* for this project.
+
+## Tests
+
+To run the test suite, you first need to clone this repo and then install all
+dependencies [through Composer](https://getcomposer.org):
+
+```bash
+$ composer install
+```
+
+To run the test suite, go to the project root and run:
+
+```bash
+$ php vendor/bin/phpunit
+```
+
 ## License
 
 MIT
diff --git a/composer.json b/composer.json
index 3018b68..4fa10da 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,8 @@
         "react/datagram": "~1.0"
     },
     "require-dev": {
-        "clue/hexdump": "0.2.*"
+        "clue/hexdump": "0.2.*",
+        "phpunit/phpunit": "^6.0 || ^5.7 || ^4.8.35"
     },
     "suggest": {
         "php": "PHP 5.4+ is required for listening on multicast addresses (socket options to send IGMP announcements)",
diff --git a/tests/FunctionalTest.php b/tests/FunctionalTest.php
index 20b2e2c..a809509 100644
--- a/tests/FunctionalTest.php
+++ b/tests/FunctionalTest.php
@@ -15,6 +15,7 @@ public function setUp()
         $this->factory = new Factory($this->loop);
     }
 
+    /** @doesNotPerformAssertions */
     public function testSenderWithNoReceiver()
     {
         $sender = $this->factory->createSender();
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 8711ee0..b27aa01 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -1,10 +1,10 @@
 <?php
 
-require_once __DIR__ . '/../vendor/autoload.php';
+require __DIR__ . '/../vendor/autoload.php';
 
 error_reporting(-1);
 
-class TestCase extends PHPUnit_Framework_TestCase
+class TestCase extends PHPUnit\Framework\TestCase
 {
     protected function expectCallableOnce()
     {
@@ -39,30 +39,8 @@ protected function expectCallableNever()
         return $mock;
     }
 
-    protected function expectCallableOnceParameter($type)
-    {
-        $mock = $this->createCallableMock();
-        $mock
-            ->expects($this->once())
-            ->method('__invoke')
-            ->with($this->isInstanceOf($type));
-
-        return $mock;
-    }
-
-    /**
-     * @link https://github.com/reactphp/react/blob/master/tests/React/Tests/Socket/TestCase.php (taken from reactphp/react)
-     */
     protected function createCallableMock()
     {
-        return $this->getMock('CallableStub');
+        return $this->getMockBuilder('stdClass')->setMethods(array('__invoke'))->getMock();
     }
 }
-
-class CallableStub
-{
-    public function __invoke()
-    {
-    }
-}
-