What problem are you trying to solve?

Some tests were not discovered or ran, leading to broken test coverage and warnings on 5.13+

• https://marcphilipp.de/blog/2025/08/16/stf-milestone-5-discovery-issues/

So when we detect a method declaration annotated with any of the test annotations (@Test, @ParameterizedTest, @RepeatedTest, ...), which does not have void return type:

• Change the method return type to void
• Remove any return statements from the body, which are not inside a nested lambda or class

Describe the situation before applying the recipe

import org.junit.jupiter.api.Test;
class A {
    @Test
    int foo() {
        int i = 42;
        return i;
    }
}

Describe the situation after applying the recipe

import org.junit.jupiter.api.Test;
class A {
    @Test
    void foo() {
        int i = 42;
    }
}

Have you considered any alternatives or workarounds?

• Add a warning comment about test discovery: Already done at test execution and in IDE.
• Remove the test annotation; perhaps safer in case the test method is called anywhere, but perhaps more unexpected.