diff --git a/lib/compat/wordpress-6.5/fonts/class-wp-font-collection.php b/lib/compat/wordpress-6.5/fonts/class-wp-font-collection.php
index 019cf0f3f0b29d..bfaef134d0fdae 100644
--- a/lib/compat/wordpress-6.5/fonts/class-wp-font-collection.php
+++ b/lib/compat/wordpress-6.5/fonts/class-wp-font-collection.php
@@ -55,14 +55,6 @@ final class WP_Font_Collection {
 		 */
 		public function __construct( $slug, $data_or_file ) {
 			$this->slug = sanitize_title( $slug );
-
-			if ( is_array( $data_or_file ) ) {
-				$this->data = $this->sanitize_and_validate_data( $data_or_file );
-			} else {
-				// JSON data is lazy loaded by ::get_data().
-				$this->src = $data_or_file;
-			}
-
 			if ( $this->slug !== $slug ) {
 				_doing_it_wrong(
 					__METHOD__,
@@ -71,6 +63,13 @@ public function __construct( $slug, $data_or_file ) {
 					'6.5.0'
 				);
 			}
+
+			if ( is_array( $data_or_file ) ) {
+				$this->data = $this->sanitize_and_validate_data( $data_or_file );
+			} else {
+				// JSON data is lazy loaded by ::get_data().
+				$this->src = $data_or_file;
+			}
 		}
 
 		/**
@@ -95,6 +94,7 @@ public function get_data() {
 				'description' => '',
 				'categories'  => array(),
 			);
+
 			return wp_parse_args( $this->data, $defaults );
 		}
 
@@ -229,7 +229,7 @@ private static function get_sanitization_schema() {
 									'fontFamily'          => 'sanitize_text_field',
 									'fontStyle'           => 'sanitize_text_field',
 									'fontWeight'          => 'sanitize_text_field',
-									'src'                 => function ( $value ) {
+									'src'                 => static function ( $value ) {
 										return is_array( $value )
 											? array_map( 'sanitize_text_field', $value )
 											: sanitize_text_field( $value );
diff --git a/lib/compat/wordpress-6.5/fonts/class-wp-font-library.php b/lib/compat/wordpress-6.5/fonts/class-wp-font-library.php
index 9bf90ca1d9dd8a..6e735ad31c5459 100644
--- a/lib/compat/wordpress-6.5/fonts/class-wp-font-library.php
+++ b/lib/compat/wordpress-6.5/fonts/class-wp-font-library.php
@@ -22,7 +22,6 @@ class WP_Font_Library {
 		 * Font collections.
 		 *
 		 * @since 6.5.0
-		 *
 		 * @var array
 		 */
 		private $collections = array();
@@ -52,8 +51,8 @@ public function register_font_collection( $slug, $data_or_file ) {
 
 			if ( $this->is_collection_registered( $new_collection->slug ) ) {
 				$error_message = sprintf(
-				/* translators: %s: Font collection slug. */
-					__( 'Font collection with slug: "%s" is already registered.', 'gutenberg' ),
+					/* translators: %s: Font collection slug. */
+					__( 'Font collection with slug "%s" is already registered.', 'gutenberg' ),
 					$new_collection->slug
 				);
 				_doing_it_wrong(
@@ -122,7 +121,7 @@ public function get_font_collections() {
 		 *                                     or WP_Error object if the font collection doesn't exist.
 		 */
 		public function get_font_collection( $slug ) {
-			if ( array_key_exists( $slug, $this->collections ) ) {
+			if ( $this->is_collection_registered( $slug ) ) {
 				return $this->collections[ $slug ];
 			}
 			return new WP_Error( 'font_collection_not_found', 'Font collection not found.' );
diff --git a/lib/compat/wordpress-6.5/fonts/fonts.php b/lib/compat/wordpress-6.5/fonts/fonts.php
index e6913b0d8a57eb..96bd089488e8fd 100644
--- a/lib/compat/wordpress-6.5/fonts/fonts.php
+++ b/lib/compat/wordpress-6.5/fonts/fonts.php
@@ -184,7 +184,6 @@ function gutenberg_register_font_collections() {
 	 * }
 	 */
 	function wp_get_font_dir( $defaults = array() ) {
-		// Multi site path
 		$site_path = '';
 		if ( is_multisite() && ! ( is_main_network() && is_main_site() ) ) {
 			$site_path = '/sites/' . get_current_blog_id();
@@ -258,9 +257,10 @@ function _wp_before_delete_font_face( $post_id, $post ) {
 		}
 
 		$font_files = get_post_meta( $post_id, '_wp_font_face_file', false );
+		$font_dir   = wp_get_font_dir()['path'];
 
 		foreach ( $font_files as $font_file ) {
-			wp_delete_file( wp_get_font_dir()['path'] . '/' . $font_file );
+			wp_delete_file( $font_dir . '/' . $font_file );
 		}
 	}
 	add_action( 'before_delete_post', '_wp_before_delete_font_face', 10, 2 );