Heed deprecation warning

smurfix · smurfix · commit e8c00f59a54c · 2018-08-03T10:44:01.000+02:00
diff --git a/setup.cfg b/setup.cfg
@@ -3,5 +3,5 @@ test=pytest
 [flake8]
 max-line-length=99
 ignore=E402,E731,E127,E502,E123,W503
-[pytest]
+[tool:pytest]
 addopts = -p no:asyncio
