diff --git a/jedi/evaluate/compiled/mixed.py b/jedi/evaluate/compiled/mixed.py
index dce5d99d..2aee1cbe 100644
--- a/jedi/evaluate/compiled/mixed.py
+++ b/jedi/evaluate/compiled/mixed.py
@@ -38,6 +38,9 @@ class MixedObject(object):
         assert search_global is False
         return [LazyMixedNamesDict(self._evaluator, self, is_instance=False)]
 
+    def __repr__(self):
+        return '<%s: %s>' % (type(self).__name__, repr(self.obj))
+
     def __getattr__(self, name):
         return getattr(self._definition, name)
 
diff --git a/test/test_api/test_interpreter.py b/test/test_api/test_interpreter.py
index 143b79d0..957bc247 100644
--- a/test/test_api/test_interpreter.py
+++ b/test/test_api/test_interpreter.py
@@ -5,6 +5,7 @@ Tests of ``jedi.api.Interpreter``.
 from ..helpers import TestCase
 import jedi
 from jedi._compatibility import is_py33
+from jedi.evaluate.compiled import mixed
 
 class _GlobalNameSpace():
     class SideEffectContainer():
@@ -56,6 +57,9 @@ def test_side_effect_completion():
     we need some mixed kind of magic for tests.
     """
     _GlobalNameSpace.SideEffectContainer.foo = 1
+    side_effect = get_completion('SideEffectContainer', _GlobalNameSpace.__dict__)
+
+    assert isinstance(side_effect._definition, mixed.MixedObject)
     foo = get_completion('SideEffectContainer.foo', _GlobalNameSpace.__dict__)
     assert foo.name == 'foo'