Project Test Files
A subset of a project's files can automatically be included in the list of test files in the Testing tool. The set of files is specified by the Test file patterns field on the Testing tab of the Project Properties dialog (which can also be accessed using the Add Files from Project menu item.
Any file matching the glob style wildcard pattern specified here is considered a test file. For details, see Wildcard Search Syntax. If the field is left empty then no project files will automatically be added.
Automatically added files may not be removed from the project tool's list except by altering the set of wild cards in the Test file patterns project attribute.