diff --git a/includes/functions.php b/includes/functions.php
index d049ab01..093b75fd 100644
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -128,27 +128,6 @@ function character_limit(&$title, $limit = 0)
 	}
 }
 
-/**
-* Cut post text to given length
-*
-* @param string $message post text
-* @param string $bbcode_uid bbcode uid
-* @param int $length The desired length
-*
-* @return string Shortened message
-*/
-function get_sub_taged_string($message, $bbcode_uid, $length)
-{
-	if (class_exists('\Nickvergessen\TrimMessage\TrimMessage'))
-	{
-		$trim = new \Nickvergessen\TrimMessage\TrimMessage($message, $bbcode_uid, $length);
-		$message = $trim->message();
-		unset($trim);
-	}
-
-	return $message;
-}
-
 function ap_validate($str)
 {
 	$s = str_replace('<br />', '<br/>', $str);
diff --git a/portal/fetch_posts.php b/portal/fetch_posts.php
index 9616b605..8931fe3b 100644
--- a/portal/fetch_posts.php
+++ b/portal/fetch_posts.php
@@ -627,7 +627,7 @@ class fetch_posts
 		if ($text_length > 0 && (strlen($row['post_text']) > $text_length))
 		{
 			$message = str_replace(array("\n", "\r"), array('<br />', "\n"), $row['post_text']);
-			$message = get_sub_taged_string($message, $row['bbcode_uid'], $text_length);
+			$message = $this->shorten_message($message, $row['bbcode_uid'], $text_length);
 			$posts_striped = true;
 		}
 		else
@@ -637,4 +637,25 @@ class fetch_posts
 
 		return $message;
 	}
+
+	/**
+	 * Shorten message to specified length
+	 *
+	 * @param string $message Post text
+	 * @param string $bbcode_uid BBCode UID
+	 * @param int $length Length the text should have after shortening
+	 *
+	 * @return string Shortened messsage
+	 */
+	public function shorten_message($message, $bbcode_uid, $length)
+	{
+		if (class_exists('\Nickvergessen\TrimMessage\TrimMessage'))
+		{
+			$trim = new \Nickvergessen\TrimMessage\TrimMessage($message, $bbcode_uid, $length);
+			$message = $trim->message();
+			unset($trim);
+		}
+
+		return $message;
+	}
 }
diff --git a/tests/unit/portal/fetch_posts_test.php b/tests/unit/portal/fetch_posts_test.php
index 557b77c5..1d23faed 100644
--- a/tests/unit/portal/fetch_posts_test.php
+++ b/tests/unit/portal/fetch_posts_test.php
@@ -10,6 +10,9 @@
 require_once(dirname(__FILE__) . '/../../../../../../includes/functions_acp.php');
 require_once(dirname(__FILE__) . '/../../../../../../includes/functions.php');
 require_once(dirname(__FILE__) . '/../../../../../../includes/utf/utf_tools.php');
+require_once(dirname(__FILE__) . '/../../../vendor/nickvergessen/phpbb-tool-trimmessage/src/Nickvergessen/TrimMessage/TrimMessage.php');
+require_once(dirname(__FILE__) . '/../../../vendor/nickvergessen/phpbb-tool-trimmessage/src/Nickvergessen/TrimMessage/PhpbbBbcodes.php');
+
 
 class phpbb_portal_fetch_posts_test extends \board3\portal\tests\testframework\database_test_case
 {