Use qputenv

plugins/plasma/pimeventsplugin/autotests/eventdatavisitortest.cpp

@@ -65,7 +65,7 @@ using DateTimeRange = QPair<QDateTime, QDateTime>;
 
 void EventDataVisitorTest::initTestCase()
 {
-    setenv("TZ", "Europe/Berlin", 1);
+    qputenv("TZ", "Europe/Berlin");
 }
 
 void EventDataVisitorTest::testGenerateUID_data()

plugins/plasma/pimeventsplugin/autotests/pimeventsplugintest.cpp

@@ -31,7 +31,7 @@ Q_DECLARE_METATYPE(CalendarEvents::EventData)
 
 void PimEventsPluginTest::initTestCase()
 {
-    setenv("TZ", "Europe/Berlin", 1);
+    qputenv("TZ", "Europe/Berlin");
     qRegisterMetaType<DateEventDataHash>("QMultiHash<QDate, CalendarEvents::EventData>");
     qRegisterMetaType<CalendarEvents::EventData>("CalendarEvents::EventData");
 }