diff --git a/tests/auto/other/languagechange/languagechange.pro b/tests/auto/other/languagechange/languagechange.pro
index be38d5c56f..25dbcc19be 100644
--- a/tests/auto/other/languagechange/languagechange.pro
+++ b/tests/auto/other/languagechange/languagechange.pro
@@ -1,5 +1,6 @@
 CONFIG += testcase
 CONFIG += parallel_test
+win32:testcase.timeout = 1800   # test runtime varies greatly on Windows, QTBUG-26006
 TARGET = tst_languagechange
 QT += widgets core-private gui-private testlib
 SOURCES += tst_languagechange.cpp