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+## Using custom OpenAPI specification and fixtures files

+

+You can place custom OpenAPI specification and fixtures files in this

+directory. The files must be in JSON format, and must be named `spec3.json`

+and `fixtures3.json` respectively.

+

+If those files are present, the test suite will start its own telnyx-mock

+process on a random available port. In order for this to work, `telnyx-mock`

+must be on the `PATH` in the environment used to run the test suite.