diff --git a/conntrackt/tests/test_utils.py b/conntrackt/tests/test_utils.py
--- a/conntrackt/tests/test_utils.py
+++ b/conntrackt/tests/test_utils.py
@@ -25,6 +25,7 @@ from django.test import TestCase
 # Third-party Python library imports.
 import palette
 import pydot
+import mock
 
 # Application imports.
 from conntrackt.models import Entity, Project, Communication
@@ -287,3 +288,40 @@ class GenerateProjectDiagramTest(TestCas
         self.assertEqual("transparent", diagram.get_bgcolor())
         self.assertEqual("1.5", diagram.get_nodesep())
         self.assertEqual([{"shape": "record"}], diagram.get_node_defaults())
+
+
+class ListFormatterCallbackTest(TestCase):
+    """
+    Tests the list_formatter_callback function.
+    """
+
+    def test_get_absolute_url(self):
+        """
+        Test the return result in case the get_absolute_url is available on
+        passed object instance.
+        """
+
+        # Set-up a minimal object mock.
+        obj = mock.Mock(spec=["_meta", "__repr__", "get_absolute_url"])
+        obj._meta = mock.Mock()
+        obj._meta.verbose_name = "name"
+        obj.__repr__ = mock.Mock()
+        obj.__repr__.return_value = "representation"
+        obj.get_absolute_url.return_value = "url"
+
+        self.assertEqual(utils.list_formatter_callback(obj), '<strong>Name</strong>: <a href="url">representation</a>')
+
+    def test_no_get_absolute_url(self):
+        """
+        Test the return result in case the get_absolute_url is not available on
+        passed object instance.
+        """
+
+        # Set-up a minimal object mock.
+        obj = mock.Mock(spec=["_meta", "__repr__"])
+        obj._meta = mock.Mock()
+        obj._meta.verbose_name = "name"
+        obj.__repr__ = mock.Mock()
+        obj.__repr__.return_value = "representation"
+
+        self.assertEqual(utils.list_formatter_callback(obj), "<strong>Name</strong>: representation")