diff --git a/pyproject.toml b/pyproject.toml
index 2f5a29b7..ed1e4658 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -302,6 +302,9 @@ plugins = [
     "mypy_strict_kwargs",
 ]
 
+[tool.pyrefly]
+errors.non-exhaustive-match = "error"
+
 [tool.pyright]
 enableTypeIgnoreComments = false
 reportUnnecessaryTypeIgnoreComment = true