test/plugin/scenarios/play-scenario/conf/logback.xml

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<!-- https://www.playframework.com/documentation/latest/SettingsLogger -->
<configuration>

    <conversionRule conversionWord="coloredLevel" converterClass="play.api.libs.logback.ColoredLevel"/>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%coloredLevel %logger{15} - %message%n%xException{10}</pattern>
        </encoder>
    </appender>

    <appender name="ASYNCSTDOUT" class="ch.qos.logback.classic.AsyncAppender">
        <appender-ref ref="STDOUT"/>
    </appender>

    <logger name="play" level="INFO"/>
    <logger name="application" level="DEBUG"/>

    <root level="WARN">
        <appender-ref ref="ASYNCSTDOUT"/>
    </root>

</configuration>