diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php
index 3fb36bff1e..28b51d7612 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php
@@ -548,7 +548,7 @@ class WP_REST_Plugins_Controller extends WP_REST_Controller {
 			'network_only' => $item['Network'],
 			'requires_wp'  => $item['RequiresWP'],
 			'requires_php' => $item['RequiresPHP'],
-			'text_domain'  => $item['TextDomain'],
+			'textdomain'   => $item['TextDomain'],
 		);
 
 		$data = $this->add_additional_fields_to_object( $data, $request );
@@ -908,7 +908,7 @@ class WP_REST_Plugins_Controller extends WP_REST_Controller {
 					'readonly'    => true,
 					'context'     => array( 'view', 'edit', 'embed' ),
 				),
-				'text_domain'  => array(
+				'textdomain'   => array(
 					'description' => __( 'The plugin\'s text domain.' ),
 					'type'        => 'string',
 					'readonly'    => true,
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ee25738484..07e8197d87 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-beta3-48626';
+$wp_version = '5.5-beta3-48627';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.