diff --git a/src/Utils/Html.php b/src/Utils/Html.php
index b5e9cc831..81bad0a4e 100644
--- a/src/Utils/Html.php
+++ b/src/Utils/Html.php
@@ -238,8 +238,6 @@ class Html implements \ArrayAccess, \Countable, \IteratorAggregate, HtmlStringab
 	/** @var array<string, mixed>  element's attributes */
 	public $attrs = [];
 
-	public static bool $xhtml = false;
-
 	/** void elements */
 	public static $emptyElements = [
 		'img' => 1, 'hr' => 1, 'br' => 1, 'input' => 1, 'meta' => 1, 'area' => 1, 'embed' => 1, 'keygen' => 1,
@@ -740,7 +738,7 @@ final public function __toString(): string
 	final public function startTag(): string
 	{
 		return $this->name
-			? '<' . $this->name . $this->attributes() . (static::$xhtml && $this->isEmpty ? ' />' : '>')
+			? '<' . $this->name . $this->attributes() . '>'
 			: '';
 	}
 
@@ -771,11 +769,7 @@ final public function attributes(): string
 				continue;
 
 			} elseif ($value === true) {
-				if (static::$xhtml) {
-					$s .= ' ' . $key . '="' . $key . '"';
-				} else {
-					$s .= ' ' . $key;
-				}
+				$s .= ' ' . $key;
 				continue;
 
 			} elseif (is_array($value)) {
@@ -810,7 +804,7 @@ final public function attributes(): string
 			$s .= ' ' . $key . '=' . $q
 				. str_replace(
 					['&', $q, '<'],
-					['&amp;', $q === '"' ? '&quot;' : '&#39;', self::$xhtml ? '&lt;' : '<'],
+					['&amp;', $q === '"' ? '&quot;' : '&#39;', '<'],
 					$value,
 				)
 				. (str_contains($value, '`') && strpbrk($value, ' <>"\'') === false ? ' ' : '')
diff --git a/tests/Utils/Html.basic.phpt b/tests/Utils/Html.basic.phpt
index 6e4f5c1a7..064405e5f 100644
--- a/tests/Utils/Html.basic.phpt
+++ b/tests/Utils/Html.basic.phpt
@@ -14,63 +14,55 @@ require __DIR__ . '/../bootstrap.php';
 
 
 test('', function () {
-	Html::$xhtml = true;
 	$el = Html::el('img')->src('image.gif')->alt('');
-	Assert::same('<img src="image.gif" alt="" />', (string) $el);
-	Assert::same('<img src="image.gif" alt="" />', $el->toHtml());
-	Assert::same('<img src="image.gif" alt="" />', $el->startTag());
+	Assert::same('<img src="image.gif" alt="">', (string) $el);
+	Assert::same('<img src="image.gif" alt="">', $el->toHtml());
+	Assert::same('<img src="image.gif" alt="">', $el->startTag());
 	Assert::same('', $el->endTag());
 });
 
 
 test('', function () {
-	Html::$xhtml = true;
 	$el = Html::el('img')->setAttribute('src', 'image.gif')->setAttribute('alt', '');
-	Assert::same('<img src="image.gif" alt="" />', (string) $el);
-	Assert::same('<img src="image.gif" alt="" />', $el->startTag());
+	Assert::same('<img src="image.gif" alt="">', (string) $el);
+	Assert::same('<img src="image.gif" alt="">', $el->startTag());
 	Assert::same('', $el->endTag());
 });
 
 
 test('', function () {
-	Html::$xhtml = true;
 	$el = Html::el('img')->accesskey(0, true)->alt('alt', false);
-	Assert::same('<img accesskey="0" />', (string) $el);
-	Assert::same('<img accesskey="0 1" />', (string) $el->accesskey(1, true));
-	Assert::same('<img accesskey="0" />', (string) $el->accesskey(1, false));
-	Assert::same('<img accesskey="0" />', (string) $el->accesskey(0, true));
-	Assert::same('<img accesskey="0" />', (string) $el->accesskey(0));
+	Assert::same('<img accesskey="0">', (string) $el);
+	Assert::same('<img accesskey="0 1">', (string) $el->accesskey(1, true));
+	Assert::same('<img accesskey="0">', (string) $el->accesskey(1, false));
+	Assert::same('<img accesskey="0">', (string) $el->accesskey(0, true));
+	Assert::same('<img accesskey="0">', (string) $el->accesskey(0));
 
 	unset($el->accesskey);
-	Assert::same('<img />', (string) $el);
+	Assert::same('<img>', (string) $el);
 });
 
 
 test('', function () {
-	Html::$xhtml = true;
 	$el = Html::el('img')->appendAttribute('accesskey', 0)->setAttribute('alt', false);
-	Assert::same('<img accesskey="0" />', (string) $el);
-	Assert::same('<img accesskey="0 1" />', (string) $el->appendAttribute('accesskey', 1));
-	Assert::same('<img accesskey="0" />', (string) $el->appendAttribute('accesskey', 1, false));
-	Assert::same('<img accesskey="0" />', (string) $el->appendAttribute('accesskey', 0));
-	Assert::same('<img accesskey="0" />', (string) $el->setAttribute('accesskey', 0));
-	Assert::same('<img />', (string) $el->removeAttribute('accesskey'));
+	Assert::same('<img accesskey="0">', (string) $el);
+	Assert::same('<img accesskey="0 1">', (string) $el->appendAttribute('accesskey', 1));
+	Assert::same('<img accesskey="0">', (string) $el->appendAttribute('accesskey', 1, false));
+	Assert::same('<img accesskey="0">', (string) $el->appendAttribute('accesskey', 0));
+	Assert::same('<img accesskey="0">', (string) $el->setAttribute('accesskey', 0));
+	Assert::same('<img>', (string) $el->removeAttribute('accesskey'));
 });
 
 
 test('', function () {
 	$el = Html::el('img')->src('image.gif')->alt('')->setText('any content');
-	Assert::same('<img src="image.gif" alt="" />', (string) $el);
-	Assert::same('<img src="image.gif" alt="" />', $el->startTag());
-	Assert::same('', $el->endTag());
-
-	Html::$xhtml = false;
 	Assert::same('<img src="image.gif" alt="">', (string) $el);
+	Assert::same('<img src="image.gif" alt="">', $el->startTag());
+	Assert::same('', $el->endTag());
 });
 
 
 test('', function () {
-	Html::$xhtml = false;
 	$el = Html::el('img')->setSrc('image.gif')->setAlt('alt1')->setAlt('alt2');
 	Assert::same('<img src="image.gif" alt="alt2">', (string) $el);
 	Assert::same('image.gif', $el->getSrc());
@@ -104,10 +96,6 @@ test('small & big numbers', function () {
 
 
 test('attributes escaping', function () {
-	Html::$xhtml = true;
-	Assert::same('<a one=\'"\' two="\'" three="&lt;>" four="&amp;amp;"></a>', (string) Html::el('a')->one('"')->two("'")->three('<>')->four('&amp;'));
-
-	Html::$xhtml = false;
 	Assert::same('<a one=\'"\' two="\'" three="<>" four="&amp;amp;"></a>', (string) Html::el('a')->one('"')->two("'")->three('<>')->four('&amp;'));
 	Assert::same('<a one="``xx "></a>', (string) Html::el('a')->one('``xx')); // mXSS
 });