diff --git a/radical/utils/__init__.py b/radical/utils/__init__.py
index 1e3e653a0..a0d5e26b0 100644
--- a/radical/utils/__init__.py
+++ b/radical/utils/__init__.py
@@ -12,6 +12,8 @@
 from url            import Url
 from testing        import TestConfig, Testing, get_test_config
 from dict_mixin     import DictMixin
+from lockable       import Lockable
+from registry       import Registry, READONLY, READWRITE
 
 # import utility methods
 from ids            import generate_id
diff --git a/radical/utils/testing.py b/radical/utils/testing.py
index d0cd8eda4..93df79973 100644
--- a/radical/utils/testing.py
+++ b/radical/utils/testing.py
@@ -47,7 +47,7 @@ def __init__ (self, cfg_file, cfg_name=None) :
 
     def __setitem__(self, key, value):
         self.changed_values[key] = value
-        super(D, self).__setitem__(key, value)
+        super(TestConfig, self).__setitem__(key, value)
 
     def __getattr__(self, item):
         """Maps values to attributes.