diff --git a/test/test_metaconfig.py b/test/test_metaconfig.py
index f9250f4..98c4108 100644
--- a/test/test_metaconfig.py
+++ b/test/test_metaconfig.py
@@ -187,17 +187,17 @@ def test_meta_meta():
 def test_meta_new_config():
     od = make_description()
     meta = MetaConfig(['name1', 'name2'], optiondescription=od)
-    assert len(meta.config.list()) == 2
+    assert len(list(meta.config.list())) == 2
     meta.config.new('newconf1')
-    assert len(meta.config.list()) == 3
+    assert len(list(meta.config.list())) == 3
 
 
 def test_meta_new_config_wrong_name():
     od = make_description()
     meta = MetaConfig(['name1', 'name2'], optiondescription=od)
-    assert len(meta.config.list()) == 2
+    assert len(list(meta.config.list())) == 2
     raises(ConflictError, "meta.config.new('name1')")
-    assert len(meta.config.list()) == 2
+    assert len(list(meta.config.list())) == 2
 
 
 def test_meta_meta_set():
diff --git a/tiramisu/api.py b/tiramisu/api.py
index 8e39c83..bf6817b 100644
--- a/tiramisu/api.py
+++ b/tiramisu/api.py
@@ -923,13 +923,14 @@ class TiramisuContextConfig(TiramisuContext):
         return TiramisuAPI(self.config_bag.context.duplicate(session_id))
 
     def _m_new(self, name):
-        self.config_bag.context.new_config(name)
+        return TiramisuAPI(self.config_bag.context.new_config(name))
 
     def _m_list(self):
         return self._g_list()
 
     def _g_list(self):
-        return self.config_bag.context.cfgimpl_get_children()
+        for child in self.config_bag.context.cfgimpl_get_children():
+            yield TiramisuAPI(child)
 
     def __getattr__(self,
                     name: str) -> Callable: