Running tests in parallel from one Class

Using Java 11, Gradle 6.5.1

In the build.gradle there is an option:
maxParallelForks = 8

I have two classes, first has 2 tests and second has 30 tests.
When I run tests using Gradle it runs only in 2 threads.
One thread - tests for the first class, Second thread - tests for the second class.

But, how to make Gradle to execute all tests in parallel?
So tests from the same class could be run in parallel.