[Nostromo] Improve coverage

CHANGELOG.md

@@ -1,7 +1,7 @@
-CHANGELOG for 3.x
+CHANGELOG for 3.X
 =================
 
-* 3.0.X (2017-XX-XX)
+* 3.X (2017-XX-XX)
  * Add new Composer task, to update phar (composer/self-update)
  * [#344] Allow to flag Filesystem tasks
  * [PR#346] Add new File System task, to change file's modes (fs/chmod)

tests/Task/BuiltIn/Composer/SelfUpdateTaskTest.php

@@ -19,6 +19,7 @@ class SelfUpdateTaskTest extends TestCase
         $task = new SelfUpdateTask();
         $task->setOptions(['path' => 'composer']);
         $task->setRuntime($runtime);
+        $this->assertEquals('[Composer] Self Update', $task->getDescription());
 
         try {
             $task->execute();