diff --git a/.travis.yml b/.travis.yml
index d6e1dfe..72ae172 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,28 @@
 language: php
 php:
-  - 5.3
+# - 5.3 # requires old distro, see below
+  - 5.4
+  - 5.5
   - 5.6
-  - 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 3f83c11..4075e78 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,13 @@ expired IETF draft: https://tools.ietf.org/html/draft-goland-http-udp-01
 This is an alternative to DNS-Based Service Discovery (DNS-SD)
 as defined in [RFC 6763](http://tools.ietf.org/html/rfc6763).
 
+**Table of Contents**
+
+* [Quickstart example](#quickstart-example)
+* [Install](#install)
+* [Tests](#tests)
+* [License](#license)
+
 > Note: This project is in early alpha stage! Feel free to report any issues you encounter.
 
 ## Quickstart example
@@ -53,6 +60,26 @@ The recommended way to install this library is [through composer](http://getcomp
 }
 ```
 
+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 4c66ed2..7ef22e1 100644
--- a/composer.json
+++ b/composer.json
@@ -18,5 +18,8 @@
         "react/event-loop": "~0.4.0|~0.3.0",
         "react/promise": "~2.0|~1.0",
         "clue/multicast-react": "~0.2.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^6.0 || ^5.7 || ^4.8.35"
     }
 }
diff --git a/tests/ClientTest.php b/tests/ClientTest.php
index 1f2a149..d53878f 100644
--- a/tests/ClientTest.php
+++ b/tests/ClientTest.php
@@ -5,22 +5,25 @@
 
 class ClientTest extends TestCase
 {
+    /**
+     * @doesNotPerformAssertions
+     */
     public function testCtor()
     {
-        $loop = $this->getMock('React\EventLoop\LoopInterface');
+        $loop = $this->getMockBuilder('React\EventLoop\LoopInterface')->getMock();
         new Client($loop);
     }
 
     public function testSearchCancel()
     {
-        $loop = $this->getMock('React\EventLoop\LoopInterface');
+        $loop = $this->getMockBuilder('React\EventLoop\LoopInterface')->getMock();
         $multicast = $this->getMockBuilder('Clue\React\Multicast\Factory')->disableOriginalConstructor()->getMock();
         $client = new Client($loop, $multicast);
 
-        $socket = $this->getMock('React\Datagram\SocketInterface');
+        $socket = $this->getMockBuilder('React\Datagram\SocketInterface')->getMock();
         $socket->expects($this->once())->method('send');
 
-        $timer = $this->getMock('React\EventLoop\Timer\TimerInterface');
+        $timer = $this->getMockBuilder('React\EventLoop\Timer\TimerInterface')->getMock();
         $loop->expects($this->once())->method('addTimer')->will($this->returnValue($timer));
 
         $multicast->expects($this->once())->method('createSender')->will($this->returnValue($socket));
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index b1e7d90..156599d 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -2,7 +2,7 @@
 
 require __DIR__ . '/../vendor/autoload.php';
 
-class TestCase extends PHPUnit_Framework_TestCase
+class TestCase extends PHPUnit\Framework\TestCase
 {
     protected function expectCallableOnce()
     {
@@ -19,24 +19,14 @@ protected function expectCallableNever()
     {
         $mock = $this->createCallableMock();
         $mock
-        ->expects($this->never())
-        ->method('__invoke');
+            ->expects($this->never())
+            ->method('__invoke');
 
         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');
-    }
-}
-
-class CallableStub
-{
-    public function __invoke()
-    {
+        return $this->getMockBuilder('stdClass')->setMethods(array('__invoke'))->getMock();
     }
 }