pytest-mock: fixture 'mocker' not found

I haven’t looked too closely into this bug yet, but the error itself is strange, given that it explicitly lists ‘mocker’ as one of the available fixtures.

I had run tox -r previously and everything passed. Then I upgraded

pytest (2.9.2) -> 3.0.3
pytest-mock (1.2) -> 1.4.0

And started seeing this failure.

  @pytest.fixture
  def request(mocker):
E       fixture 'mocker' not found
>       available fixtures: cache, capfd, capsys, doctest_namespace, mock, mocker, monkeypatch, pytestconfig, record_xml_property, recwarn, request, requests_get, tmpdir, tmpdir_factory
>       use 'pytest --fixtures [testpath]' for help on them.

Code looks something like this:

import pytest
from mock import Mock, sentinel
from requests import codes

@pytest.fixture
def request(mocker):
    return Mock((), url='https://test-url.com:8000', cookies=None, headers={})

About this issue

Original URL
State: closed
Created 8 years ago
Comments: 17 (7 by maintainers)

Most upvoted comments

Hi @Dishanka13, did you install pytest-mock using pip install pytest-mock?

You can verify that by calling pip list

+95

nicoddemus on Feb 20, 2019

Not sure if still relevant but I found that I had to install pytest-mock into my user-level general python module-library (~/.local/lib/python*) when running from a venv, even though that venv had the pytest-mock package installed and relevant executables ran from the venv.

BlackestDawn on Dec 6, 2019

Hi @Dishanka13, did you install pytest-mock using pip install pytest-mock?

You can verify that by calling pip list

After that reopening terminal solved

SmartManoj on Feb 18, 2022

FWIW

I m a newby with python.

I have to maintain an app with pyenv + virtualenv

I have this same error fixture 'mocker' not found even if I have done pip install ... or update pip install -r requirements-dev.txt

My solution was to create a new pyenv and to create a new virtualenv + pip install -r requirements-dev.txt and then everything worked.

thanks @BlackestDawn you helped me understand this.

Hettomei on Aug 18, 2020