pytest: how to explicitly enable a plugin in command line

Question

Let's say I disabled a pytest plugin in my pytest.ini file like:

[pytest]
...
addopts=
    -p no:myplugin

Now I would like to be able to enable it sometimes with command line arguments, something like:

pytest -p yes:myplugin

Is that possible? Please, if you have better recommendations, I would like to know that too.

Answer 1

To load the plugin again, use -p pytest_myplugin. This will work when chained after -p no:myplugin (either on the command-line, or from pytest.ini's addopts).

What's happening here: when you specify -p no:plugin, pytest prepends "pytest_" to "plugin". This is because myplugin is actually imported from pytest_myplugin. Unfortunately, this convenience isn't mirrored on the loading side, which requires the full module name of the plugin.