Skip to main content
Join the official 2019 Python Developers SurveyStart the survey!

py.test fixture for creating a virtual environment

Project description

pytest-venv is a simple pytest plugin that exposes a venv fixture. The fixture is used to create a new virtual environment which can be used to install packages and run commands inside tests.


import os

def test_it(venv):
    venv.install('pyramid', upgrade=True)
        [os.path.join(venv.bin, 'pserve'), 'development.ini'],


The venv fixture is an instance of pytest_venv.VirtualEnvironment(path) which exposes the following API:


The path to the virtualenv directory.


The path to the bin / Scripts directory.


The path to the python executable in the virtualenv.

create(system_site_packages=False, python=None)

Create a virtualenv. This is called automatically by the venv fixture. If python is None then the virtual environment will be created using the same executable as the active runtime.

install(pkg_name, editable=False, upgrade=False)

Use pip to install a package into the virtualenv. pkg_name may be a path to a package on disk.


Returns a pkg_resources.Version object which is sortable and convertable to a string.

0.2 (2016-11-27)

  • Add VirtualEnvironment.get_version for querying versions from installed packages in the virtual environment.
  • Support custom python interpreter paths via VirtualEnvironment.create(python=...).

0.1.1 (2016-11-27)

  • Ensure the virtual environment is started with the same Python executable as the current process.

0.1 (2016-11-27)

  • Initial release.

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for pytest-venv, version 0.2
Filename, size File type Python version Upload date Hashes
Filename, size pytest_venv-0.2-py2.py3-none-any.whl (4.9 kB) File type Wheel Python version py2.py3 Upload date Hashes View hashes
Filename, size pytest-venv-0.2.tar.gz (6.6 kB) File type Source Python version None Upload date Hashes View hashes

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page