Update set of tox environments. Use a better testrunner.

.github/workflows/tests.yml

@@ -32,11 +32,11 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install -U pip setuptools wheel
-        python -m pip install -U coverage
+        python -m pip install -U coverage zope.testrunner
         python -m pip install -U -e ".[test]"
     - name: Test
       run: |
-        coverage run -m unittest discover -s src
+        coverage run -m zope.testrunner --test-path=src
     - name: Lint
       if: matrix.python-version == '3.12'
       run: |

tox.ini

@@ -1,27 +1,17 @@
 [tox]
-envlist=py27,py27-old,py36,py37,py38,py39,pypy,doc,coverage
+envlist=py38,py39,310,311,312,313,pypy3,doc
 
 [testenv]
-usedevelop = true
+usedevelop = false
 extras =
     test
 deps =
-    pylint
     coverage
-    old: Sphinx == 1.7.0
+    zope.testrunner
 commands =
-    coverage run -p -m unittest discover -s src
-    pylint -r no src/sphinxcontrib
+    coverage run -p -m zope.testrunner --test-path=src
 passenv = HOME
 
-[testenv:coverage]
-commands =
-    coverage combine
-    coverage html -i
-    coverage report -i --fail-under=100
-depends = py27, py27-old, py36, py37, py38, py39, pypy
-parallel_show_output = true
-
 [testenv:doc]
 commands =
     sphinx-build -W -b linkcheck -d {envtmpdir}/doctrees doc {envtmpdir}/linkcheck