diff --git a/django_kepi/models.py b/django_kepi/models.py
index 790deb5..d1fadc6 100644
--- a/django_kepi/models.py
+++ b/django_kepi/models.py
@@ -17,7 +17,7 @@ class Cobject(models.Model):
     published = models.DateTimeField(default=datetime.datetime.now)
     updated = models.DateTimeField(default=datetime.datetime.now)
 
-    def activity_fields(self):
+    def serialize(self):
 
         result = {
             'id': self.pk,
diff --git a/django_kepi/views.py b/django_kepi/views.py
index 466ce5d..d1e6b50 100644
--- a/django_kepi/views.py
+++ b/django_kepi/views.py
@@ -26,6 +26,6 @@ class ActivityObjectView(django.views.View):
         #instance = ActivityObject.objects.get(pk=kwargs['id'])
         instance = None # XXX temp
 
-        result = instance.activity_fields()
+        result = instance.serialize()
 
         return render(result)
diff --git a/tests/tests_unit.py b/tests/tests_unit.py
index 868c52b..4ccfafe 100644
--- a/tests/tests_unit.py
+++ b/tests/tests_unit.py
@@ -18,4 +18,4 @@ class UserTests(TestCase):
                 )
         activity.save()
 
-        raise ValueError(str(activity.activity_fields()))
+        raise ValueError(str(activity.serialize()))
diff --git a/things_for_testing/models.py b/things_for_testing/models.py
index d8f354c..dfc6317 100644
--- a/things_for_testing/models.py
+++ b/things_for_testing/models.py
@@ -9,10 +9,8 @@ class ThingUser(models.Model):
     #        on_delete=models.CASCADE,
     #        )
 
-    def activity_fields(self):
+    def serialize(self):
         return {
                 'name': self.name,
                 }
 
-register_type('Person', ThingUser)
-