Ignore flake8 document linting on tests

Author: lavaleri

tox.ini

@@ -132,7 +132,7 @@ commands =
         # Ignore F811 redefinition errors in tests (breaks with pytest-mock use)
         # E203 is not PEP8 compliant https://github.com/ambv/black#slices
         # W503 is not PEP8 compliant https://github.com/ambv/black#line-breaks--binary-operators
-        --ignore F811,E203,W503 \
+        --ignore F811,E203,W503,D \
         test/
 
 [testenv:flake8-examples]