1 files changed, 7 insertions, 1 deletions
diff --git a/setup.cfg b/setup.cfg
index d4cf07e3..9574a5ce 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -16,9 +16,15 @@ license_file = LICENSE
 [mypy]
 follow_imports = silent
 ignore_missing_imports = True
-strict_optional = False
+strict_optional = True
 warn_no_return = False
 check_untyped_defs = True
 
+[mypy-test_isort]
+strict_optional = False
+
+[mypy-isort.isort]
+strict_optional = False
+
 [tool:pytest]
 testpaths = test_isort.py