Skip test_free_after_iterating

Author: slozier

tests/suite/test_dict_stdlib.py

@@ -30,8 +30,11 @@ def load_tests(loader, standard_tests, pattern):
         if is_mono:
             skip_tests += [
                 test.test_dict.DictTest('test_container_iterator'), # https://github.com/IronLanguages/ironpython3/issues/544
-                test.test_dict.DictTest('test_free_after_iterating') # AssertionError
             ]
+            if sys.version_info >= (3, 6):
+                skip_tests += [
+                    test.test_dict.DictTest('test_free_after_iterating') # AssertionError
+                ]
 
         return generate_suite(tests, failing_tests, skip_tests)