Thanks for the help Harshit! But I realized that I framed my question improperly. I used the above command before too, but it raises an error -

CannotOverwriteExistingCassetteException: No match for the request (<Request (POST) http://localhost:9001/3.0/members/find?subscriber=%2Aexample.com%2A&list_id=foo.example.com&role=member>) was found. Can't overwrite existing cassette ('/home/hp/postorius_aditya/src/postorius/tests/fixtures/vcr_cassettes/ListMembersTest.test_search_members_1.yaml') in your current record mode ('once').

Is this error because the request is not present in test cases or is it some other error? Also, if it is a test case problem, can anyone suggest me how to change the test case (or where I could read about how to go about it) to make the build pass?

Thanks, Aditya.