With `test_bench` among the listed test bench in the `tb` directory and `sub_test` a source code file in the `tb/test_source_code/tb_<test_bench>` directory.
```make TARGET=risc_v_cpu-test```
You can remove the dash and `sub_test` argument to run only the non source code based test.
```make TARGET=risc_v_cpu```
Or use `all` as a `sub_test` to run all test associated to a `test_bench`.