diff --git a/plugins/discourse-local-dates/test/javascripts/acceptance/local-dates-test.js.es6 b/plugins/discourse-local-dates/test/javascripts/acceptance/local-dates-test.js.es6
index 2e0ad23aa77..ceae0ca6eb1 100644
--- a/plugins/discourse-local-dates/test/javascripts/acceptance/local-dates-test.js.es6
+++ b/plugins/discourse-local-dates/test/javascripts/acceptance/local-dates-test.js.es6
@@ -46,6 +46,7 @@ function freezeDateAndZone(date, zone, cb) {
     cb();
 
     moment.tz.guess.returns(DEFAULT_ZONE);
+    moment.tz.setDefault(DEFAULT_ZONE);
     sandbox.useFakeTimers(moment(DEFAULT_DATE).valueOf());
   }
 }