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
@@ -10023,6 +10023,10 @@
 
   public function testXmlEncoder() {
     $encoder = new XmlEncoder();
+
+    $decoded = $encoder->decode($this->pgnxml, 'pgnxml');
+    $this->assertIdentical($this->normalized, $decoded, 'Decoded PGNXML is equal to expected PGN data.');
+
     $encoded = $encoder->encode($this->normalized, 'pgnxml', array('xml_root_node_name' => 'PGNGAMES'));
 
     $expected = new \DOMDocument;