diff --git a/src/Symfony/Component/Process/Tests/AbstractProcessTest.php b/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
index 5348f57a9c..76002c1639 100644
--- a/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
@@ -263,7 +263,7 @@ abstract class AbstractProcessTest extends \PHPUnit_Framework_TestCase
 
     public function testStop()
     {
-        $process = $this->getProcess('php -r "while (true) {}"');
+        $process = $this->getProcess('php -r "sleep(4);"');
         $process->start();
         $this->assertTrue($process->isRunning());
         $process->stop();
@@ -279,7 +279,7 @@ abstract class AbstractProcessTest extends \PHPUnit_Framework_TestCase
 
     public function testIsNotSuccessful()
     {
-        $process = $this->getProcess('php -r "while (true) {}"');
+        $process = $this->getProcess('php -r "sleep(4);"');
         $process->start();
         $this->assertTrue($process->isRunning());
         $process->stop();
@@ -314,7 +314,7 @@ abstract class AbstractProcessTest extends \PHPUnit_Framework_TestCase
             $this->markTestSkipped('Windows does not support POSIX signals');
         }
 
-        $process = $this->getProcess('php -r "while (true) {}"');
+        $process = $this->getProcess('php -r "sleep(4);"');
         $process->start();
         $process->stop();
         $this->assertTrue($process->hasBeenSignaled());
@@ -329,7 +329,7 @@ abstract class AbstractProcessTest extends \PHPUnit_Framework_TestCase
         // SIGTERM is only defined if pcntl extension is present
         $termSignal = defined('SIGTERM') ? SIGTERM : 15;
 
-        $process = $this->getProcess('php -r "while (true) {}"');
+        $process = $this->getProcess('php -r "sleep(4);"');
         $process->start();
         $process->stop();
 
@@ -360,7 +360,7 @@ abstract class AbstractProcessTest extends \PHPUnit_Framework_TestCase
 
         // Sleep doesn't work as it will allow the process to handle signals and close
         // file handles from the other end.
-        $process = $this->getProcess('php -r "while (true) {}"');
+        $process = $this->getProcess('php -r "sleep 4"');
         $process->start();
 
         // PHP will deadlock when it tries to cleanup $process