diff --git a/pyproject.toml b/pyproject.toml
index 56febf4..63ff1a7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -102,8 +102,11 @@ parallel = true
 
 [tool.mypy]
 python_version = "3.7"
+show_error_codes = true
+pretty = true
 warn_return_any = true
 warn_unused_configs = true
+warn_unreachable = true
 
 [tool.pytest]
 filterwarnings = [