diff --git a/EditorialModel/test/test_types.py b/EditorialModel/test/test_types.py
index 2334fab..43302d4 100644
--- a/EditorialModel/test/test_types.py
+++ b/EditorialModel/test/test_types.py
@@ -8,7 +8,7 @@ import unittest
 
 from EditorialModel.types import EmType
 from EditorialModel.classes import EmClass
-from EditorialModel.classtypes import EmClassType
+from EditorialModel.classtypes import EmClassType, EmNature
 from EditorialModel.components import EmComponent
 from EditorialModel.fieldgroups import EmFieldGroup
 from EditorialModel.fieldtypes import *
@@ -40,14 +40,14 @@ class TypeTestCase(TestCase):
 
         self.emclass1 = EmClass.create("entity1", EmClassType.entity)
         self.emclass2 = EmClass.create("entity2", EmClassType.entity)
-
-        self.emtype = EmType.create('type1',self.emclass2)
-        self.emfieldgroup = EmFieldGroup.create('fieldgroup1',self.emclass1)
+        self.emtype = EmType.create(name='type1', em_class=self.emclass2)
+        self.emtype2 = EmType.create(name='type2', em_class=self.emclass2)
+        self.emtype3 = EmType.create(name='type3', em_class=self.emclass2)
+        self.emfieldgroup = EmFieldGroup.create(name='fieldgroup1', em_class=self.emclass1)
         self.emfieldtype = get_field_type('integer')
         self.emfield = EmField.create(name='field1', fieldgroup=self.emfieldgroup, fieldtype=self.emfieldtype, rel_to_type_id=self.emtype.uid)
 
         restoreDbState(TEST_TYPE_DBNAME)
-        pass
 
 class TestSelectField(TypeTestCase):
     def testSelectField(self):
@@ -58,3 +58,14 @@ class TestSelectField(TypeTestCase):
         self.emtype.unselect_field(self.emfield)
         self.assertFalse(Em_Field_Type(self.emtype.uid, self.emfield.uid).exists())
 
+class TestLinkedTypes(TypeTestCase):
+    def testLinkedtypes(self):
+        self.emtype.add_superior(self.emtype2, EmNature.PARENT)
+        self.emtype3.add_superior(self.emtype, EmNature.PARENT)
+
+        linked_types = self.emtype.linked_types()
+
+        self.assertEqual(len(linked_types),2)
+        self.assertNotIn(self.emtype,linked_types)
+        self.assertIn(self.emtype2, linked_types)
+        self.assertIn(self.emtype3, linked_types)