Consider not requiring pytest in requirements.txt

[cdent]

It should perhaps only be required to install pytest if pytest is going to be used, in which case, imports should be conditional?

I'm not sure it is that much of a big deal, but people do tend to prefer limiting requirements.

[jd]

You could use flavors.

[cdent]

You could use flavors.

Yeah. I'm not feeling super motivated by this one, but would happily accept patches if someone was.