diff --git a/tests/lib/Activity/ManagerTest.php b/tests/lib/Activity/ManagerTest.php
index 2235d63383b..f8b34b4c716 100644
--- a/tests/lib/Activity/ManagerTest.php
+++ b/tests/lib/Activity/ManagerTest.php
@@ -24,6 +24,7 @@
 namespace Test\Activity;
 
 use OCP\IConfig;
+use OCP\IL10N;
 use OCP\IRequest;
 use OCP\IUser;
 use OCP\IUserSession;