JUnit 5 is properly fitted with modules but junit-platform-console-standalone-1.13.4.jar does not include a module-info.class. This is probably due to Java's limitation of not allowing more than one such file in a .jar file, however, it would be reasonable and feasible to have just one: that of the API.

All of the following code assumes Java 25 (or at least Java 23+).

Ideal

The ideal, reasonable-looking minimal tester file for me would look like this.

import module org.junit.jupiter.api;

@Test
void test() {
    assertEquals(4, 2+2);
}

It would be compiled as javac -p junit-platform-console-standalone-VSN.jar MinimalTest.java and then run as java -jar junit5_modules.jar execute -cp . -c MinimalTest.

What works in a mock implementation

Due to limitations, the file needs some boilerplate which makes it more annoying for beginners to use.

import module org.junit.jupiter.api;
// bloat: modules provide imports, just not static ones
import static org.junit.jupiter.api.Assertions.*;

@Test
void test() {
    assertEquals(4, 2+2);
}

// bloat: compact source files must have this
//        or it could be a regular source file with a different sort of bloat
void main() {}

Compilation also requires an extra option: javac --add-modules org.junit.jupiter.api -p junit-platform-console-standalone-VSN.jar MinimalTest.java

The module-info.class file also has to be inserted into junit-platform-console-standalone-VSN.jar (considered as a zip).

Deliverables

• The junit-platform-console-standalone-***.jar becomes usable as a org.junit.jupiter.api module.