diff --git a/model_utils/tracker.py b/model_utils/tracker.py
index 5136990..118d1ac 100644
--- a/model_utils/tracker.py
+++ b/model_utils/tracker.py
@@ -50,10 +50,7 @@ class DescriptorWrapper:
         if instance is None:
             return self
         was_deferred = self.field_name in instance.get_deferred_fields()
-        try:
-            value = self.descriptor.__get__(instance, owner)
-        except AttributeError:
-            value = self.descriptor
+        value = self.descriptor.__get__(instance, owner)
         if was_deferred:
             tracker_instance = getattr(instance, self.tracker_attname)
             tracker_instance.saved_data[self.field_name] = lightweight_deepcopy(value)
diff --git a/tests/models.py b/tests/models.py
index ac65931..8b49654 100644
--- a/tests/models.py
+++ b/tests/models.py
@@ -249,7 +249,7 @@ class TrackedAbstract(AbstractTracked):
     number = models.IntegerField()
     mutable = MutableField(default=None)
 
-    tracker = FieldTracker()
+    tracker = ModelTracker()
 
 
 class TrackedNotDefault(models.Model):
diff --git a/tests/test_fields/test_field_tracker.py b/tests/test_fields/test_field_tracker.py
index 42bd66b..f239bd3 100644
--- a/tests/test_fields/test_field_tracker.py
+++ b/tests/test_fields/test_field_tracker.py
@@ -1,7 +1,5 @@
 from __future__ import annotations
 
-from unittest import skip
-
 from django.core.cache import cache
 from django.core.exceptions import FieldError
 from django.db import models
@@ -877,7 +875,6 @@ class InheritedModelTrackerTests(ModelTrackerTests):
         self.assertTrue(self.tracker.has_changed('name2'))
 
 
-@skip("has known failures")
 class AbstractModelTrackerTests(ModelTrackerTests):
 
     tracked_class = TrackedAbstract