diff --git a/packages/playground/data-liberation/tests/WPMarkdownToBlocksTests.php b/packages/playground/data-liberation/tests/WPMarkdownToBlocksTests.php
index d052f8fa4b..8a46ef908e 100644
--- a/packages/playground/data-liberation/tests/WPMarkdownToBlocksTests.php
+++ b/packages/playground/data-liberation/tests/WPMarkdownToBlocksTests.php
@@ -48,7 +48,7 @@ public function test_markdown_to_blocks_conversion($markdown, $expected) {
 
     private function normalize_markup($markup) {
         $processor = WP_HTML_Processor::create_fragment($markup);
-        $serialized = $markup; //$processor->serialize();
+        $serialized = $processor->serialize();
         $serialized = trim(
             str_replace(
                 [