fixed using deprecated yaml parser method.

src/LinkORB/Transmogrifier/Dataset.php

@@ -3,6 +3,7 @@
 namespace LinkORB\Transmogrifier;
 
 use LinkORB\Transmogrifier\Database;
+use LinkORB\Transmogrifier\Parser\YamlParser;
 
 class Dataset
 {
@@ -50,7 +51,7 @@ public function loadDatasetFile($filename, $format = '')
                 break;
             case "yml":
             case "yaml":
-                $ds = new \PHPUnit_Extensions_Database_DataSet_YamlDataSet($filename);
+                $ds = new \PHPUnit_Extensions_Database_DataSet_YamlDataSet($filename, new YamlParser());
                 break;
             case "xml":
                 $ds = new \PHPUnit_Extensions_Database_DataSet_XmlDataSet($filename);

src/LinkORB/Transmogrifier/Parser/YamlParser.php

@@ -0,0 +1,24 @@
+<?php
+namespace LinkORB\Transmogrifier\Parser;
+
+use PHPUnit_Extensions_Database_DataSet_IYamlParser;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Parser;
+
+class YamlParser implements PHPUnit_Extensions_Database_DataSet_IYamlParser
+{
+    /**
+     * @param string $yamlFile
+     * @return array parsed YAML
+     */
+    public function parseYaml($yamlFile)
+    {
+        $yaml = new Parser();
+        try {
+            $value = $yaml->parse(file_get_contents($yamlFile));
+        } catch (ParseException $e) {
+            throw $e;
+        }
+        return $value;
+    }
+}