error on pytest

test_error.md

 python -m pytest tests/test_health_check.py
============================================================== test session starts ===============================================================
platform linux -- Python 3.10.6, pytest-7.2.0, pluggy-1.0.0
rootdir: /home/bgarcial/projects/nd064_course_1/exercises/python-helloworld
plugins: flask-1.2.0
collected 2 items                                                                                                                                

tests/test_health_check.py E.                                                                                                              [100%]

===================================================================== ERRORS =====================================================================
______________________________________________________ ERROR at setup of test_health_check _______________________________________________________
file /home/bgarcial/projects/nd064_course_1/exercises/python-helloworld/tests/test_health_check.py, line 9
  def test_health_check(client):
file /home/bgarcial/udacity_cnf/lib/python3.10/site-packages/pytest_flask/plugin.py, line 116
  @pytest.fixture(autouse=True)
  def _configure_application(request, monkeypatch):
E       fixture 'app' not found
>       available fixtures: _configure_application, _monkeypatch_response_class, _push_request_context, accept_any, accept_json, accept_jsonp, accept_mimetype, cache, capfd, capfdbinary, caplog, capsys, capsysbinary, client, client_class, config, doctest_namespace, live_server, monkeypatch, pytestconfig, record_property, record_testsuite_property, record_xml_attribute, recwarn, request_ctx, tmp_path, tmp_path_factory, tmpdir, tmpdir_factory
>       use 'pytest --fixtures [testpath]' for help on them.

/home/bgarcial/udacity_cnf/lib/python3.10/site-packages/pytest_flask/plugin.py:116
============================================================ short test summary info =============================================================
ERROR tests/test_health_check.py::test_health_check