switch to PHPUnit 6.0

composer.json

@@ -12,9 +12,9 @@
         }
     ],
     "require": {
-        "php": ">=5.3.0",
+        "php": "^7.0",
         "ext-pcntl": "*",
-        "phpunit/phpunit": ">=4.8 <6.0"
+        "phpunit/phpunit": "^6.0"
     },
     "autoload": {
         "psr-4": {

src/PHPUnit/Listener/GracefulInterruptListener.php

@@ -2,8 +2,8 @@
 namespace Esler\PHPUnit\Listener;
 
 use BadMethodCallException;
-use PHPUnit_Framework_BaseTestListener;
-use PHPUnit_Framework_Test;
+use PHPUnit\Framework\BaseTestListener;
+use PHPUnit\Framework\Test;
 
 /**
  * This class defines an extension for PHPUnit.
@@ -14,7 +14,7 @@
  * @author     Ondrej Esler <[email protected]>
  * @license    MIT
  */
-class GracefulInterruptListener extends PHPUnit_Framework_BaseTestListener
+class GracefulInterruptListener extends BaseTestListener
 {
 
     /**
@@ -33,10 +33,10 @@ public function __construct() {
     /**
      * A test ended.
      *
-     * @param PHPUnit_Framework_Test $test
-     * @param float                  $time
+     * @param Test  $test
+     * @param float $time
      */
-    public function endTest(PHPUnit_Framework_Test $test, $time) {
+    public function endTest(Test $test, $time) {
         $this->test = $test;
         pcntl_signal_dispatch();
     }

tests/unit/PHPUnit/Listener/GracefulInterruptListenerTest.php

@@ -1,6 +1,8 @@
 <?php
 namespace Esler\PHPUnit\Listener;
 
+use PHPUnit\Framework\TestCase;
+
 /**
  * Fake test suite with some long tests. It servers like demonstration
  * of listener's feature. Try hit Ctrl+\. Process will not goes into background
@@ -10,7 +12,7 @@
  * @author     Ondrej Esler <[email protected]>
  * @license    MIT
  */
-class GracefulInterruptListenerTest extends \PHPUnit_Framework_TestCase
+class GracefulInterruptListenerTest extends TestCase
 {
 
     /**