Fix tox config

Author: mikemanger

tox.ini

@@ -4,18 +4,15 @@
 # and then run "tox" from this directory.
 
 [tox]
-# pip is broken on py32
 env_list = py36, py37, py38, py39, py310, py311, py312, py313
 
 [testenv]
-install_command=pip install {packages}
 commands =
-    coverage run -m pytest
-    coverage report
+    pytest --cov=lib
 deps =
-    coverage
-    pytest
-    -e.
+    pytest-cov
+# This needs to be set to include the test fixtures
+use_develop = true
 
 [gh]
 python =