What is the method for running JUnit(5) tests concurrently in Gradle when testing a single class?

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To run JUnit5 tests concurrently in Gradle when testing a single class, you can set the maxParallelForks parameter in the test task configuration.

Here's an example:

test {
    useJUnitPlatform()
    maxParallelForks = 4
}

This will run up to 4 test classes concurrently, which can significantly reduce the time it takes to run all the tests.