diff --git a/classes/repository/instance_repository.php b/classes/repository/instance_repository.php
index 526cf10..c19c34d 100644
--- a/classes/repository/instance_repository.php
+++ b/classes/repository/instance_repository.php
@@ -62,14 +62,14 @@ public static function get_by_id(int $id, bool $withstrings = true) : instance {
             $sortedstrings = [];
             $dboheaders = $DB->get_records(tables::LOCALIZED_STRING_TABLE);
             foreach ($dboheaders as $dboheader) {
-                $dbo_obj = new db_localized_string;
-                $dbo_obj->id = $dboheader->id;
-                $dbo_obj->languageid = $dboheader->languageid;
-                $dbo_obj->string = $dboheader->string;
-                $dbo_obj->type = $dboheader->type;
-                $dbo_obj->foreignkey = $dboheader->foreignkey;
-
-                $sortedstrings[$dbo_obj->type][$dbo_obj->foreignkey][$dbo_obj->languageid] = $dbo_obj;
+                $dboobj = new db_localized_string;
+                $dboobj->id = $dboheader->id;
+                $dboobj->languageid = $dboheader->languageid;
+                $dboobj->string = $dboheader->string;
+                $dboobj->type = $dboheader->type;
+                $dboobj->foreignkey = $dboheader->foreignkey;
+
+                $sortedstrings[$dboobj->type][$dboobj->foreignkey][$dboobj->languageid] = $dboobj;
             }
 
             foreach ($dbocategories as $dbocategory) {
diff --git a/lib.php b/lib.php
index 72bbd7c..6bd0514 100644
--- a/lib.php
+++ b/lib.php
@@ -183,7 +183,7 @@ function verbalfeedback_delete_instance($id) {
  */
 function verbalfeedback_supports($feature) {
     if (defined('FEATURE_MOD_PURPOSE') && defined('MOD_PURPOSE_ASSESSMENT')) {
-    // Moodle ≥ 4.0.
+        // Moodle ≥ 4.0.
         switch ($feature) {
             case FEATURE_MOD_INTRO:
                 return true;
@@ -209,7 +209,7 @@ function verbalfeedback_supports($feature) {
                 return null;
         }
     } else {
-    // Moodle ≤ 3.11.
+        // Moodle ≤ 3.11.
         switch ($feature) {
             case FEATURE_MOD_INTRO:
                 return true;
diff --git a/tests/verbalfeedback_test.php b/tests/verbalfeedback_test.php
index b57c3ec..5fd04d6 100644
--- a/tests/verbalfeedback_test.php
+++ b/tests/verbalfeedback_test.php
@@ -22,6 +22,10 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+namespace mod_verbalfeedback\test;
+
+defined('MOODLE_INTERNAL') || die();
+
 use core_analytics\model;
 use mod_verbalfeedback\model\instance;
 
@@ -104,7 +108,7 @@ protected function create_and_enrol_users() {
     /**
      * Test a verbalfeedback instance
      *
-     * @covers ::instance
+     * @covers verbalfeedback::instance
      */
     public function test_verbalfeedback() {
         $this->resetAfterTest(true);
@@ -122,4 +126,4 @@ public function test_verbalfeedback_get_user_grade() {
         $this->resetAfterTest(true);
         $this->assertEquals([], verbalfeedback_get_user_grades($this->verbalfeedback));
     }
-}
\ No newline at end of file
+}