SLF4J - simplelogger.properties ignored

I am trying to use simplelogger.properties for my Java Spring project. Additionally I want to use Lombok @Slf4j annotation.

Unfortunately my simplelogger.properties is ignored. Changes in the logging level done there do not show any effect.

My pom.xml dependencies look like:

        <!-- SPRING -->
        ...

        <!-- LOMBOK -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.10</version>
            <scope>provided</scope>
        </dependency>

        <!-- SLF4J -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.28</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.30</version>
            <scope>test</scope>
        </dependency>

What my simplelogger.properties looks like:

org.slf4j.simpleLogger.defaultLogLevel=debug
org.slf4j.simpleLogger.showDateTime=false
org.slf4j.simpleLogger.showThreadName=false
org.slf4j.simpleLogger.showLogName=false

What a usage of the logger would look like:

@Slf4j
public class Frankenstein {
    public Frankenstein() {
        log.debug("i am alive");
    }
}

I am not able to view the debug message by setting the logging level to debug within the simplelogger.properties.

I would like to use the simplelogger.properties to change the logging level.