diff --git a/lib/experimental/class-gutenberg-rest-global-styles-revisions-controller.php b/lib/experimental/class-gutenberg-rest-global-styles-revisions-controller.php
index eb82053052aec..c5d5a5f0dff1a 100644
--- a/lib/experimental/class-gutenberg-rest-global-styles-revisions-controller.php
+++ b/lib/experimental/class-gutenberg-rest-global-styles-revisions-controller.php
@@ -265,6 +265,9 @@ public function get_item_permissions_check( $request ) {
 			return $post;
 		}
 
+		/*
+		 * The same check as WP_REST_Global_Styles_Controller->get_item_permissions_check.
+		 */
 		if ( ! current_user_can( 'read_post', $post->ID ) ) {
 			return new WP_Error(
 				'rest_cannot_view',
diff --git a/phpunit/class-gutenberg-rest-global-styles-revisions-controller-test.php b/phpunit/class-gutenberg-rest-global-styles-revisions-controller-test.php
index 4dcf1585e9596..6856638bf8754 100644
--- a/phpunit/class-gutenberg-rest-global-styles-revisions-controller-test.php
+++ b/phpunit/class-gutenberg-rest-global-styles-revisions-controller-test.php
@@ -11,6 +11,11 @@ class Gutenberg_REST_Global_Styles_Revisions_Controller_Test extends WP_Test_RES
 	 */
 	protected static $second_admin_id;
 
+	/**
+	 * @var int
+	 */
+	protected static $author_id;
+
 	/**
 	 * @var int
 	 */
@@ -37,6 +42,11 @@ public static function wpSetupBeforeClass( $factory ) {
 				'role' => 'administrator',
 			)
 		);
+		self::$author_id       = $factory->user->create(
+			array(
+				'role' => 'author',
+			)
+		);
 		// This creates the global styles for the current theme.
 		self::$global_styles_id = wp_insert_post(
 			array(
@@ -160,6 +170,17 @@ public function test_get_item_schema() {
 		$this->assertArrayHasKey( 'modified_gmt', $properties, 'Schema properties array does not have "modified_gmt" key' );
 	}
 
+	/**
+	 * @covers Gutenberg_REST_Global_Styles_Revisions_Controller::get_item_permissions_check
+	 */
+	public function test_get_item_permissions_check() {
+		wp_set_current_user( self::$author_id );
+		$request  = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . self::$global_styles_id . '/revisions' );
+		$response = rest_get_server()->dispatch( $request );
+
+		$this->assertErrorResponse( 'rest_cannot_view', $response, 403 );
+	}
+
 	/**
 	 * @doesNotPerformAssertions
 	 */