diff --git a/src/messenger/tests/webim/libs/classes/EventDispatcherTest.php b/src/messenger/tests/webim/libs/classes/EventDispatcherTest.php
index 9a144601..915901e5 100644
--- a/src/messenger/tests/webim/libs/classes/EventDispatcherTest.php
+++ b/src/messenger/tests/webim/libs/classes/EventDispatcherTest.php
@@ -2,7 +2,7 @@
 
 require_once dirname(__FILE__) . '/../../../../webim/libs/classes/event_dispatcher.php';
 require_once dirname(__FILE__) . '/../../../../webim/libs/classes/plugin.php';
-require_once dirname(__FILE__) . '/phpunit_autotest_plugin_manager/plugin.mibew.inc.php';
+require_once dirname(__FILE__) . '/phpunit_autotest_plugin_manager/phpunit_autotest_plugin_manager_plugin.php';
 
 /**
  * Test class for EventDispatcher.
diff --git a/src/messenger/tests/webim/libs/classes/phpunit_autotest_plugin_manager/plugin.mibew.inc.php b/src/messenger/tests/webim/libs/classes/phpunit_autotest_plugin_manager/phpunit_autotest_plugin_manager_plugin.php
similarity index 100%
rename from src/messenger/tests/webim/libs/classes/phpunit_autotest_plugin_manager/plugin.mibew.inc.php
rename to src/messenger/tests/webim/libs/classes/phpunit_autotest_plugin_manager/phpunit_autotest_plugin_manager_plugin.php
diff --git a/src/messenger/webim/libs/classes/plugin_manager.php b/src/messenger/webim/libs/classes/plugin_manager.php
index 8bae5176..bb960d86 100644
--- a/src/messenger/webim/libs/classes/plugin_manager.php
+++ b/src/messenger/webim/libs/classes/plugin_manager.php
@@ -56,7 +56,7 @@ Class PluginManager {
 			$plugin_config = isset($plugin['config']) ? $plugin['config'] : array();
 			$plugin_classname = ucfirst($plugin_name) . "Plugin";
 			// Try to load plugin file
-			if (! (include_once $plugin_name."/plugin.mibew.inc.php")) {
+			if (! (include_once $plugin_name."/".$plugin_name."_plugin.php")) {
 				trigger_error("Cannot load plugin file!", E_USER_ERROR);
 			}
 			// Check plugin class name