Update tox command

Author: mikemanger

tox.ini

@@ -1,4 +1,4 @@
-# Tox (http://tox.testrun.org/) is a tool for running tests
+# Tox (https://tox.wiki/) is a tool for running tests
 # in multiple virtualenvs. This configuration file will run the
 # test suite on all supported python versions. To use it, "pip install tox"
 # and then run "tox" from this directory.
@@ -10,7 +10,7 @@ env_list = py36, py37, py38, py39, py310, py311, py312, py313
 [testenv]
 install_command=pip install {packages}
 commands =
-    coverage run --source=pytest
+    coverage run -m pytest
     coverage report
 deps =
     coverage