Use covdefaults to handle coveragerc
diff --git a/setup.cfg b/setup.cfg
index c05ca0c..e6c488a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -68,6 +68,9 @@
 [bdist_wheel]
 universal = True
 
+[coverage:run]
+plugins = covdefaults
+
 [mypy]
 check_untyped_defs = true
 disallow_any_generics = true