diff --git a/pyproject.toml b/pyproject.toml
index 5572b744..d1773b68 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -103,3 +103,6 @@ full = [
     "cvxpy>=1.3.0",  # No Clarabel solver before 1.3.0
     "ecos>=2.0.14",  # Does not work before 2.0.14
 ]
+
+[tool.pytest.ini_options]
+xfail_strict = true