diff --git a/src/Symfony/Component/Console/Tests/Output/NullOutputTest.php b/src/Symfony/Component/Console/Tests/Output/NullOutputTest.php
index 8dd5f7cd9b..b24b7a1f4d 100644
--- a/src/Symfony/Component/Console/Tests/Output/NullOutputTest.php
+++ b/src/Symfony/Component/Console/Tests/Output/NullOutputTest.php
@@ -12,13 +12,27 @@
 namespace Symfony\Component\Console\Tests\Output;
 
 use Symfony\Component\Console\Output\NullOutput;
+use Symfony\Component\Console\Output\OutputInterface;
 
 class NullOutputTest extends \PHPUnit_Framework_TestCase
 {
     public function testConstructor()
     {
         $output = new NullOutput();
+
+        ob_start();
         $output->write('foo');
-        $this->assertTrue(true, '->write() does nothing'); // FIXME
+        $buffer = ob_get_clean();
+
+        $this->assertSame('', $buffer, '->write() does nothing (at least nothing is printed)');
+    }
+
+    public function testVerbosity()
+    {
+        $output = new NullOutput();
+        $this->assertSame(OutputInterface::VERBOSITY_QUIET, $output->getVerbosity(), '->getVerbosity() returns VERBOSITY_QUIET for NullOutput by default');
+
+        $output->setVerbosity(OutputInterface::VERBOSITY_VERBOSE);
+        $this->assertSame(OutputInterface::VERBOSITY_QUIET, $output->getVerbosity(), '->getVerbosity() always returns VERBOSITY_QUIET for NullOutput');
     }
 }