https://github.com/hynek/characteristic/issues/41

--- characteristic-14.3.0/setup.cfg.orig
+++ characteristic-14.3.0/setup.cfg
@@ -1,4 +1,4 @@
-[pytest]
+[tools:pytest]
 minversion = 2.6
 strict = true
 norecursedirs = .* build dist test_data *.egg