diff --git a/tests/mock/provider.php b/tests/mock/provider.php
index 21ef2fc949..1e7b4bc4ba 100644
--- a/tests/mock/provider.php
+++ b/tests/mock/provider.php
@@ -12,12 +12,19 @@
  * sessions.
  */
 class phpbb_provider {
+
 	function autologin()
 	{
 		return array();
 	}
+
 	function kill()
 	{
 
 	}
+
+	function validate_session($data)
+	{
+		return true;
+	}
 }