Tox option "usedevelop" is not required since 4facceee42fb6296c0d907681858ddd1d0192363

tox.ini

@@ -13,7 +13,6 @@ commands =
 deps =
     mock >= 0.5.0
     meld3 >= 0.6.5
-usedevelop = true
 
 [testenv:cover]
 basepython =