diff --git a/src/Bundle/ChillCalendarBundle/Tests/RemoteCalendar/Connector/MSGraph/CalendarSyncerTest.php b/src/Bundle/ChillCalendarBundle/Tests/RemoteCalendar/Connector/MSGraph/CalendarSyncerTest.php
index 8f6cb9335..e6196aead 100644
--- a/src/Bundle/ChillCalendarBundle/Tests/RemoteCalendar/Connector/MSGraph/CalendarSyncerTest.php
+++ b/src/Bundle/ChillCalendarBundle/Tests/RemoteCalendar/Connector/MSGraph/CalendarSyncerTest.php
@@ -356,20 +356,6 @@ final class CalendarSyncerTest extends TestCase
             }
         JSON;
 
-    protected function setUp(): void
-    {
-        parent::setUp();
-
-        // all tests should run when timezone = +02:00
-        $brussels = new \DateTimeZone('Europe/Brussels');
-
-        if (7200 === $brussels->getOffset(new \DateTimeImmutable())) {
-            date_default_timezone_set('Europe/Brussels');
-        } else {
-            date_default_timezone_set('Europe/Moscow');
-        }
-    }
-
     public function testHandleAttendeesConfirmingCalendar(): void
     {
         $machineHttpClient = new MockHttpClient([