diff --git a/pyproject.toml b/pyproject.toml
index c67379a9..8f855d41 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -170,6 +170,7 @@ addopts = [
   "-ra",
   "--strict-config",
   "--strict-markers",
+  "--strict-warnings",
   "--doctest-modules",
   # Config pytest-cov
   "--cov=nireports",