Add sphinx-apidoc options
diff --git a/tox.ini b/tox.ini
index ce942f1..6517828 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,6 +26,8 @@
 deps =
   {[testenv]deps}
   sphinx
+setenv =
+  SPHINX_APIDOC_OPTIONS=members,inherited-members,show-inheritance
 commands =
   rm -r docs/reference
   sphinx-apidoc --output-dir docs/reference --separate --module-first google