diff --git a/tests/test_framework/phpbb_functional_test_case.php b/tests/test_framework/phpbb_functional_test_case.php
index e40efdec03..3b4da690b4 100644
--- a/tests/test_framework/phpbb_functional_test_case.php
+++ b/tests/test_framework/phpbb_functional_test_case.php
@@ -716,15 +716,27 @@ class phpbb_functional_test_case extends phpbb_test_case
 	/**
 	 * assertContains for language strings
 	 *
-	 * @param string $needle Search string
-	 * @param string $haystack Search this
-	 * @param string $message Optional failure message
+	 * @param string $needle	Search string
+	 * @param string $haystack	Search this
+	 * @param string $message	Optional failure message
 	 */
 	public function assertContainsLang($needle, $haystack, $message = null)
 	{
 		$this->assertContains(html_entity_decode($this->lang($needle), ENT_QUOTES), $haystack, $message);
 	}
 
+	/**
+	* assertNotContains for language strings
+	*
+	* @param string $needle		Search string
+	* @param string $haystack	Search this
+	* @param string $message	Optional failure message
+	*/
+	public function assertNotContainsLang($needle, $haystack, $message = null)
+	{
+		$this->assertNotContains(html_entity_decode($this->lang($needle), ENT_QUOTES), $haystack, $message);
+	}
+
 	/*
 	* Perform some basic assertions for the page
 	*