# Specifying a Configuration File With `config`

To specify the configuration file the harness uses to run tests, use the `config` command.

> jtharness ... `-config` path/filename ... [task-command] ...

See About the Command-Line Examples for a description of > jtharness in the example.

The configuration file might contain default values for the test suite (which contains the tests to be run) and the work directory (where the results are placed).

Test suite and work directory values in the configuration file can be overridden with the `testsuite` and `workdirectory` commands. If the configuration file is a template and does not contain default values for the test suite and work directory, those values must be specified explicitly with the testsuite and workdirectory commands.

See Command-Line Overview for a description of the command line structure.

## Detailed Example of `config` Command

In the following example, myconfig`.jti` represents a configuration file name that might exist on your system.

Command Options Format Example:

> jtharness `-config` myconfig`.jti -runtests`

See Formatting a Command for descriptions and examples of other command formats that you can use.

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