An exclude list is a file that contains a list of tests in a test suite that should not be run for some reason. The list contains path names that uniquely identify tests to be excluded. When the harness prepares to run a test, it checks to see if the test is on the exclude list, if it is, the test is ignored during the test run.

Exclude list files conventionally use the extension .jtx and may be supplied with a test suite or downloaded from a web site.