Test fixed

Author: jer2ig

doubleml/utils/_check_defaults.py

@@ -47,7 +47,7 @@ def _check_basic_defaults_after_fit(dml_obj):
 
     # sensitivity
     assert dml_obj.sensitivity_params is None
-    if dml_obj._sensitivity_implemented:
+    if dml_obj.sensitivity_params is not None:
         assert isinstance(dml_obj.sensitivity_elements, dict)
 
     # fit method