How do I use pytest with virtualenv?

python virtualenv pytest
Henry Grantham picture Henry Grantham · Jan 27, 2016 · Viewed 19.1k times · Source

I installed pytest into a virtual environment (using virtualenv) and am running it from that virtual environment, but it is not using the packages that I installed in that virtual environment. Instead, it is using the main system packages. (Using python -m unittest discover, I can actually run my tests with the right python and packages, but I want to use the py.test framework.)

Is it possible that py.test is actually not running the pytest inside the virtual environment and I have to specify which pytest to run?

How to I get py.test to use only the python and packages that are in my virtualenv?

Also, since I have several version of Python on my system, how do I tell which Python that Pytest is using? Will it automatically use the Python within my virtual environment, or do I have to specify somehow?

Answer

Icarus picture Icarus · Feb 1, 2017

Inside your environment, you may try

python -m pytest

Related questions

How to install packages using pip according to the requirements.txt file from a local directory?

Here is the problem I have a requirements.txt that looks like: BeautifulSoup==3.2.0 Django==1.3 Fabric==1.2.0 Jinja2==2.5.5 PyYAML==3.09 Pygments==1.4 SQLAlchemy==0.7.1 South==0.7.3 amqplib==0.6.1 anyjson==0.3 ... I have a local archive directory containing all the packages + others. I have created a new virtualenv with …

Read More
How do I update pip itself from inside my virtual environment?

I'm able to update pip-managed packages, but how do I update pip itself? According to pip --version, I currently have pip 1.1 installed in my virtualenv and I want to update to the latest version. What's the command for that? Do …

Read More
How to leave/exit/deactivate a Python virtualenv

I'm using virtualenv and the virtualenvwrapper. I can switch between virtualenv's just fine using the workon command. me@mymachine:~$ workon env1 (env1)me@mymachine:~$ workon env2 (env2)me@mymachine:~$ workon env1 (env1)me@mymachine:~$ How do I exit all virtual …

Read More