IS_TESTERY- Set to TRUE if the tests are running in the Testery platform. Useful for writing tests that perform differently when running in the platform.
TESTERY_CHROME_ARGS- Arguments that should be passed to Chrome if you are manually launching it in your tests.
TESTERY_TEST_RUN_KEY- A unique key string given to each test run.
TESTERY_TEST_RUN_ID- A unique numeric id given to each test run.
TESTERY_ENVIRONMENT_URL- The Environment URL set on the Environment. See Setting Up Environments.