New comment by olafmersmann on void-packages repository

https://github.com/void-linux/void-packages/pull/27082#issuecomment-744477200

Comment:
> Try adding `python3-pytest` to `checkdepends` for it.

I tried that in `master`:
```
❯ git diff
diff --git a/srcpkgs/python3-matplotlib/template b/srcpkgs/python3-matplotlib/template
index 3940b55d0f..c6acaf5861 100644
--- a/srcpkgs/python3-matplotlib/template
+++ b/srcpkgs/python3-matplotlib/template
@@ -9,6 +9,7 @@ hostmakedepends="pkg-config python3-setuptools python3-certifi python3-numpy"
 makedepends="python3-devel freetype-devel libpng-devel libqhull-devel"
 depends="python3-certifi python3-cycler python3-kiwisolver
  python3-numpy python3-Pillow python3-parsing python3-dateutil"
+checkdepends="$depends python3-pytest>=3.6"
 short_desc="Python3 2D/3D plotting library"
 maintainer="Alessio Sergi <al3hex@gmail.com>"
 license="custom:matplotlib, BSD-3-Clause, MIT"
```
but still get
```
❯ ./xbps-src check -f python3-matplotlib
*snip*
lib/matplotlib/__init__.py:174: in <module>
    _check_versions()
lib/matplotlib/__init__.py:159: in _check_versions
    from . import ft2font
E   ImportError: cannot import name 'ft2font' from partially initialized module 'matplotlib' (most likely due to a circular import) (/builddir
/matplotlib-3.3.3/lib/matplotlib/__init__.py)
=========================== short test summary info ============================
ERROR  - ImportError: cannot import name 'ft2font' from partially initialized...
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!
=============================== 1 error in 0.30s ===============================
=> ERROR: python3-matplotlib-3.3.3_1: do_check: 'python3 -m pytest ${make_check_args} ${make_check_target}' exited with 2
=> ERROR:   in do_check() at common/build-style/python3-module.sh:28
```

I'll investigate further. If I find a solution, it would go into a separate merge request, right?