diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
index 09813399e..b952080d6 100644
--- a/Lib/test/support/__init__.py
+++ b/Lib/test/support/__init__.py
@@ -1898,7 +1898,9 @@ def _check_tracemalloc():
 
 
 def check_free_after_iterating(test, iter, cls, args=()):
-    return # TODO: RUSTPYTHON; GC is not supported yet
+    # TODO: RUSTPYTHON; GC is not supported yet
+    test.assertTrue(False)
+    return
 
     done = False
     def wrapper():