diff -u b/lib/Drupal/pgn/Tests/XmlEncoderUnitTest.php b/lib/Drupal/pgn/Tests/XmlEncoderUnitTest.php
--- b/lib/Drupal/pgn/Tests/XmlEncoderUnitTest.php
+++ b/lib/Drupal/pgn/Tests/XmlEncoderUnitTest.php
@@ -5,9 +5,10 @@
  * Contains \Drupal\pgn\Tests\XmlEncoderUnitTest.
  */
 
-namespace Drupal\pgn\Serializer\Encoder;
+namespace Drupal\pgn\Tests;
 
 use Drupal\simpletest\DrupalUnitTestBase;
+use Drupal\pgn\Serializer\Encoder\XmlEncoder;
 
 /**
  * Tests the PGN Encoder.