diff --git a/tox.ini b/tox.ini
index 2cfbeae1..819e84af 100644
--- a/tox.ini
+++ b/tox.ini
@@ -67,7 +67,7 @@ uv_resolution =
   min: lowest-direct
 
 commands =
-  pytest --durations=20 --durations-min=1.0 --cov-report term-missing {posargs:-n auto}
+  pytest --durations=20 --durations-min=1.0 --cov-report term-missing !min: -Werror {posargs:-n auto}
 
 [testenv:style]
 description = Check our style guide