You can add any combination of tests to a sub-inspection when you are creating an inspection, including multiples of the same type of test. Tests are added to a sub-inspection using the Tests toolbar in the Design Panel of the Inspection Editor
Not all of the tests are technically "tests." For simplicity, that term is used to describe all of the sub-inspection test toolbar buttons. For example, a Line break test is used to create a visual separation between two tests in a running inspection.
Click a button for a test on the toolbar to add it to the sub-inspection. A button for that test displays in the Design panel, and the Properties panel displays properties specific to that type of test.