diff --git a/src/_pytest/assertion/rewrite.py b/src/_pytest/assertion/rewrite.py
index a1bbb171b..63f9dd8f2 100644
--- a/src/_pytest/assertion/rewrite.py
+++ b/src/_pytest/assertion/rewrite.py
@@ -281,7 +281,9 @@ class AssertionRewritingHook(importlib.abc.MetaPathFinder, importlib.abc.Loader)
             else:
                 from importlib.resources.readers import FileReader
 
-            return FileReader(types.SimpleNamespace(path=self._rewritten_names[name]))
+            return FileReader(  # type:ignore[no-any-return]
+                types.SimpleNamespace(path=self._rewritten_names[name])
+            )
 
 
 def _write_pyc_fp(