docs-archive/apache-airflow/2.0.0/apache-airflow/stable/_sources/howto/use-test-config.rst.txt

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Using the Test Mode Configuration
=================================

Airflow has a fixed set of "test mode" configuration options. You can load these
at any time by calling ``airflow.configuration.load_test_config()``. Please **note** that this
operation is **not reversible**.

Some options for example, ``DAG_FOLDER``, are loaded before you have a chance to call ``load_test_config()``.
In order to eagerly load the test configuration, set ``test_mode`` in ``airflow.cfg``:

.. code-block:: ini

  [tests]
  unit_test_mode = True

Due to Airflow's automatic environment variable expansion (see :doc:`set-config`), you can also set the
environment variable ``AIRFLOW__CORE__UNIT_TEST_MODE`` to temporarily overwrite ``airflow.cfg``.