diff --git a/src/wp-includes/html-api/class-wp-css-attribute-selector.php b/src/wp-includes/html-api/class-wp-css-attribute-selector.php
index ab566f8f1af11..d2d4d17792a81 100644
--- a/src/wp-includes/html-api/class-wp-css-attribute-selector.php
+++ b/src/wp-includes/html-api/class-wp-css-attribute-selector.php
@@ -140,7 +140,7 @@ final class WP_CSS_Attribute_Selector extends WP_CSS_Selector_Parser_Matcher {
 	 * @param string|null $modifier The attribute case modifier.
 	 *        Must be one of the class MODIFIER_* constants or null.
 	 */
-	public function __construct( string $name, ?string $matcher = null, ?string $value = null, ?string $modifier = null ) {
+	private function __construct( string $name, ?string $matcher = null, ?string $value = null, ?string $modifier = null ) {
 		$this->name     = $name;
 		$this->matcher  = $matcher;
 		$this->value    = $value;
diff --git a/src/wp-includes/html-api/class-wp-css-class-selector.php b/src/wp-includes/html-api/class-wp-css-class-selector.php
index 9abcb881ace49..ff7a0b0442813 100644
--- a/src/wp-includes/html-api/class-wp-css-class-selector.php
+++ b/src/wp-includes/html-api/class-wp-css-class-selector.php
@@ -29,7 +29,7 @@ final class WP_CSS_Class_Selector extends WP_CSS_Selector_Parser_Matcher {
 	 *
 	 * @param string $class_name The class name to match.
 	 */
-	public function __construct( string $class_name ) {
+	private function __construct( string $class_name ) {
 		$this->class_name = $class_name;
 	}
 
diff --git a/src/wp-includes/html-api/class-wp-css-compound-selector.php b/src/wp-includes/html-api/class-wp-css-compound-selector.php
index 002021472f496..077ed5aa4b7f3 100644
--- a/src/wp-includes/html-api/class-wp-css-compound-selector.php
+++ b/src/wp-includes/html-api/class-wp-css-compound-selector.php
@@ -45,7 +45,7 @@ final class WP_CSS_Compound_Selector extends WP_CSS_Selector_Parser_Matcher {
 	 * @param (WP_CSS_ID_Selector|WP_CSS_Class_Selector|WP_CSS_Attribute_Selector)[]|null $subclass_selectors
 	 *        The array of subclass selectors or null.
 	 */
-	public function __construct( ?WP_CSS_Type_Selector $type_selector, ?array $subclass_selectors ) {
+	private function __construct( ?WP_CSS_Type_Selector $type_selector, ?array $subclass_selectors ) {
 		$this->type_selector      = $type_selector;
 		$this->subclass_selectors = array() === $subclass_selectors ? null : $subclass_selectors;
 	}
diff --git a/src/wp-includes/html-api/class-wp-css-id-selector.php b/src/wp-includes/html-api/class-wp-css-id-selector.php
index de854c37eea9f..2c7cb6feec658 100644
--- a/src/wp-includes/html-api/class-wp-css-id-selector.php
+++ b/src/wp-includes/html-api/class-wp-css-id-selector.php
@@ -29,7 +29,7 @@ final class WP_CSS_ID_Selector extends WP_CSS_Selector_Parser_Matcher {
 	 *
 	 * @param string $id The ID to match.
 	 */
-	public function __construct( string $id ) {
+	private function __construct( string $id ) {
 		$this->id = $id;
 	}
 
diff --git a/src/wp-includes/html-api/class-wp-css-type-selector.php b/src/wp-includes/html-api/class-wp-css-type-selector.php
index 492569ee51d65..ab41a87f1a113 100644
--- a/src/wp-includes/html-api/class-wp-css-type-selector.php
+++ b/src/wp-includes/html-api/class-wp-css-type-selector.php
@@ -29,7 +29,7 @@ final class WP_CSS_Type_Selector extends WP_CSS_Selector_Parser_Matcher {
 	 *
 	 * @param string $type The element type (tag name) to match or '*' to match any element.
 	 */
-	public function __construct( string $type ) {
+	private function __construct( string $type ) {
 		$this->type = $type;
 	}