mik-laj edited a comment on issue #6098: [AIRFLOW-YYY] Fix flaky impersonation test URL: https://github.com/apache/airflow/pull/6098#issuecomment-531319961 @feluelle II'm not sure why it worked before, but I know why it works now. This test verifies that if we have PYTHONPATH set it will be correctly passed during interpersonation. We set PYTHONPATH in this place: https://github.com/apache/airflow/blob/master/run-tests#L48 This allows you to search modules from a different location. Please note that airflow modules are available because it is installed on the system - `pip install -e `. I would like to add quote from this file: ``` # AIRFLOW-1893 - Originally, impersonation tests were incomplete missing the use case when # DAGs access custom packages usually made available through the PYTHONPATH environment # variable. This file includes a DAG that imports a custom package made available and if # run via the previous implementation of impersonation, will fail by not being able to # import the custom package. # This DAG is used to test that impersonation propagates the PYTHONPATH environment # variable correctly. ```
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