diff --git a/core/js/tests/specHelper.js b/core/js/tests/specHelper.js
index 29293e89bcb7030d7d98bee8212c7771daad6328..dbe005ba2e9c71e00c78dbabc86971b30880c0a9 100644
--- a/core/js/tests/specHelper.js
+++ b/core/js/tests/specHelper.js
@@ -121,6 +121,8 @@ window.isPhantom = /phantom/i.test(navigator.userAgent);
 			OC.TestUtil = TestUtil;
 		}
 
+		moment.locale('en');
+
 		// reset plugins
 		OC.Plugins._plugins = [];