diff --git a/pyproject.toml b/pyproject.toml
index 4a0cf09e53..b41bb46249 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -240,7 +240,7 @@ exclude_lines = [
 ]
 
 [tool.pytest.ini_options]
-addopts = "--dist=loadgroup"
+addopts = "--strict-markers --strict-config --dist=loadgroup"
 asyncio_mode = "auto"
 filterwarnings = [
     "ignore::trio.TrioDeprecationWarning:anyio._backends._trio*:",