Jenkins + surefire plugin: Junit 5 tests are not executed in a multi test provider job - maven

Question

I've been struggling with this for a long time already... :(
I have a test project based on Junit4 for which I decided, innocently, to start using Junit5 for the next tests I write.
For some reason, the Jenkins job refuses to run the JUnit5 tests:
"No tests were executed!"
So, all in all, I got several JUnit4 based tests which execute, and several JUnit5 based tests which do not.
I tried to follow the guidelines here, but nothing worked for me and I got mixed up following it.
I'd appreciate your assistance with this problem.
My current relevant pom configuration is :
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>3.0.0-M5</version>
<configuration>
<testFailureIgnore>false</testFailureIgnore>
<argLine>
-javaagent:"${settings.localRepository}/org/aspectj/aspectjweaver/${aspectj.version}/aspectjweaver-${aspectj.version}.jar"
</argLine>
</configuration>
<dependencies>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.apache.maven.surefire</groupId>
<artifactId>surefire-junit47</artifactId>
<version>3.0.0-M5</version>
</dependency>
</dependencies>
</plugin>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-suite-engine</artifactId>
<version>1.8.1</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>5.9.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>5.9.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-params</artifactId>
<version>5.9.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
<version>5.9.1</version>
<scope>test</scope>
</dependency>
Maybe there are some conflicts here, I couldn't tell...