Failed attempt to suppress log from Gradle tooling

logback.xml

    <configuration>
      <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"/>
      <logger name="org.gradle.tooling" level="ERROR" additivity="false">
        <appender-ref ref="STDOUT"/>
      </logger>
      <root level="DEBUG">
        <appender-ref ref="STDOUT"/>
      </root>
    </configuration>