diff --git a/mod/assign/submission/onlinetext/tests/locallib_test.php b/mod/assign/submission/onlinetext/tests/locallib_test.php
index 2448c39318a..19af03217a8 100644
--- a/mod/assign/submission/onlinetext/tests/locallib_test.php
+++ b/mod/assign/submission/onlinetext/tests/locallib_test.php
@@ -103,7 +103,10 @@ class assignsubmission_onlinetext_locallib_testcase extends advanced_testcase {
             'Empty submission null' => [null, true],
             'Value 0' => [0, false],
             'String 0' => ['0', false],
-            'Text' => ['Ai! laurië lantar lassi súrinen, yéni únótimë ve rámar aldaron!', false]
+            'Text' => ['Ai! laurië lantar lassi súrinen, yéni únótimë ve rámar aldaron!', false],
+            'Image' => ['<img src="test.jpg" />', false],
+            'Video' => ['<video controls="true"><source src="test.mp4"></video>', false],
+            'Audio' => ['<audio controls="true"><source src="test.mp3"></audio>', false],
         ];
     }
 }