Getting a failure on a windows machine with the following test:

1. LanguageTest::testIsSupportedLanguage with data set #3 ('FI', false, 'is not supported language, input should be in lower case')

is not supported language, input should be in lower case
Failed asserting that true matches expected false.

\tests\phpunit\languages\LanguageTest.php:1325
\tests\phpunit\MediaWikiTestCase.php:116
\tests\phpunit\MediaWikiPHPUnitCommand.php:61
\tests\phpunit\MediaWikiPHPUnitCommand.php:47
\tests\phpunit\phpunit.php:107

Came from gerrit 45069

Version: 1.21.x
Severity: normal