uninstall tpying, pypa/pip#8214, pypa/pip#8272

- #11
- pypa/pip#8214
- pypa/pip#8214

Author: basnijholt

tox.ini

@@ -35,7 +35,9 @@ output = .coverage.xml
 
 [testenv]
 deps = .[test]
-commands = pytest
+commands =
+  pip uninstall -y typing
+  pytest
 depends =
   {py37,py38}: clean
   report: {py37,py38}