-The test suiteās module must be called `test_` followed by the name of the
-module to test. So for the module `foo.nit` the test suite will be called
-`test_foo.nit`.
+A test suite is a module that uses the annotation `is test_suite`.
+
+It is common that a test suite focuses on testing a single module.
+In this case, the name of the test_suite is often `test_foo.nit` where `foo.nit` is the tested module.