MediaWiki-extensions-OAuth tests fail when no other extensions are loaded while the extension does not express any requirement in extension.json. There are some integration tests with MediaWiki-extensions-OATHAuth (WebAuthn):
15) MediaWiki\Extension\OAuth\Tests\BearerTokenValidatorTest::testValidateAuthorization with data set "legacy" ('1000', '1000')
Error: Class "MediaWiki\Extension\WebAuthn\Request" not found