spring-security/core/src/test/resources/logback-test.xml

<configuration>
  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
	<encoder>
	  <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
	</encoder>
  </appender>

  <logger name="org.springframework.security" level="${sec.log.level}:-WARN"/>

  <root level="${root.level}:-WARN">
	<appender-ref ref="STDOUT" />
  </root>

</configuration>