It would be nice if tests could be tagged as either a parent/main or sub-tests. A parent test could be executed standalone.

The subtest should be a test that can't be run directly - outside the parent test.

In this context a new property/setting/flag on the test could be introduced.

The project view should introduce a way to filter out or include sub-tests and/or main tests.

Having a unique icon representation for a subtest and another icon for a main test would be nice also.