Make sure that jedi.names is not references anymore

conftest.py

@@ -106,8 +106,8 @@ def Script(environment):
 
 
 @pytest.fixture(scope='session')
-def names(environment):
-    return partial(jedi.names, environment=environment)
+def names(Script):
+    return lambda code, **kwargs: Script(code).names(**kwargs)
 
 
 @pytest.fixture(scope='session')