diff --git a/pyproject.toml b/pyproject.toml
index 1a4fd52..bcfe7fa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,7 +52,6 @@ select = [
 ]
 ignore = [
   "C901",  # function is too complex (TODO #165: enable this)
-  "F405",  # name may be undefined, or defined from star imports
 ]
 [tool.ruff.lint.per-file-ignores]
 "demos/burgers-hessian.py" = [
@@ -61,6 +60,7 @@ ignore = [
 "demos/*.py" = [
   "E402",  # module level import not at top of file
   "F403",  # unable to detect undefined names
+  "F405",  # name may be undefined, or defined from star imports
 ]
 
 [tool.pytest.ini_options]