--- a/pyproject.toml
+++ b/pyproject.toml
@@ -296,8 +296,6 @@
 addopts = [
   "--strict-config",
   "--strict-markers",
-  "--mypy-only-local-stub",
-  "--mypy-pyproject-toml-file=pyproject.toml",
 ]
 
 # We want to forbid warnings from within xarray in our tests — instead we should