diff --git a/lib/weblib.php b/lib/weblib.php
index f88921bfb3b..1ad946b7903 100644
--- a/lib/weblib.php
+++ b/lib/weblib.php
@@ -1365,8 +1365,9 @@ function format_text($text, $format = FORMAT_MOODLE, $options = null, $courseidd
             $text = markdown_to_html($text);
             $filteroptions['stage'] = 'pre_clean';
             $text = $filtermanager->filter_text($text, $context, $filteroptions);
-            // The markdown parser does not strip dangerous html so we need to clean it, even if noclean is set to true.
-            $text = clean_text($text, FORMAT_HTML, $options);
+            if (!$options['noclean']) {
+                $text = clean_text($text, FORMAT_HTML, $options);
+            }
             $filteroptions['stage'] = 'post_clean';
             $text = $filtermanager->filter_text($text, $context, $filteroptions);
             break;
diff --git a/mod/forum/post.php b/mod/forum/post.php
index 9ea0f2aef31..ccf57f14acb 100644
--- a/mod/forum/post.php
+++ b/mod/forum/post.php
@@ -343,10 +343,7 @@ if (!empty($forum)) {
         $canreplyprivately = forum_user_can_reply_privately($modcontext, $parent);
     }
 
-    // If markdown is used, the parser does the job already, otherwise clean text from arbitrary code that might be dangerous.
-    if ($post->messageformat != FORMAT_MARKDOWN) {
-        $post = trusttext_pre_edit($post, 'message', $modcontext);
-    }
+    $post = trusttext_pre_edit($post, 'message', $modcontext);
 
     // Unsetting this will allow the correct return URL to be calculated later.
     unset($SESSION->fromdiscussion);