diff --git a/tests/phpunit/tests/comment.php b/tests/phpunit/tests/comment.php
index e39bb81e1a..b65452a730 100644
--- a/tests/phpunit/tests/comment.php
+++ b/tests/phpunit/tests/comment.php
@@ -1142,6 +1142,9 @@ class Tests_Comment extends WP_UnitTestCase {
 		}
 	}
 
+	/**
+	 * @covers ::wp_update_comment
+	 */
 	public function test_update_should_invalidate_comment_cache() {
 		global $wpdb;