According to the logs (https://github.com/r2dbc/r2dbc-mssql/runs/5222839455?check_suite_focus=true#logs), MssqlConnectionConfigurationUnitTests.configureKeyStore failed when run inside Windows.

Check out if there are some UNIX-y based test situation that could be resolved with a more independent fashion.