--- ../Tests/Field/TextareaFormFieldTest.php	2026-08-29 12:58:10.354003763 +0300
+++ ../Tests/Field/TextareaFormFieldTest.php	2026-08-29 12:59:05.480049253 +0300
@@ -59,10 +59,18 @@
         yield 'empty' => ['', ''];
         yield 'entity' => ['a&b', 'a&b'];
         yield 'escaped markup' => ['foo bar &lt;h1&gt;Baz&lt;/h1&gt;', 'foo bar <h1>Baz</h1>'];
-        yield 'comment' => ['a<!--c-->b', 'ab'];
-        yield 'element' => ['foo bar <h1>Baz</h1>', 'foo bar Baz'];
-        yield 'inline element' => ['a<b>c</b>', 'ac'];
-        yield 'nested elements' => ['a<div><p>b</p></div>c', 'abc'];
+
+        if (\LIBXML_VERSION >= 21500) {
+            yield 'comment' => ['a<!--c-->b', 'a<!--c-->b'];
+            yield 'element' => ['foo bar <h1>Baz</h1>', 'foo bar <h1>Baz</h1>'];
+            yield 'inline element' => ['a<b>c</b>', 'a<b>c</b>'];
+            yield 'nested elements' => ['a<div><p>b</p></div>c', 'a<div><p>b</p></div>c'];
+        } else {
+            yield 'comment' => ['a<!--c-->b', 'ab'];
+            yield 'element' => ['foo bar <h1>Baz</h1>', 'foo bar Baz'];
+            yield 'inline element' => ['a<b>c</b>', 'ac'];
+            yield 'nested elements' => ['a<div><p>b</p></div>c', 'abc'];
+        }
     }
 
     public function testInitializeDoesNotRepeatAdjacentTextNodes()