diff --git a/model_utils/tests/tests.py b/model_utils/tests/tests.py
index 978b1caf..2d055df1 100644
--- a/model_utils/tests/tests.py
+++ b/model_utils/tests/tests.py
@@ -10,7 +10,7 @@
 from django.core.exceptions import ImproperlyConfigured, FieldError
 from django.test import TestCase
 
-from model_utils import Choices, FieldTracker, ModelTracker
+from model_utils import Choices, FieldTracker
 from model_utils.fields import get_excerpt, MonitorField, StatusField
 from model_utils.managers import QueryManager
 from model_utils.models import StatusModel, TimeFramedModel
@@ -686,11 +686,6 @@ def update_instance(self, **kwargs):
 
 class FieldTrackerCommonTests(object):
 
-    def test_pre_save_has_changed(self):
-        self.assertHasChanged(name=True, number=True)
-        self.instance.name = 'new age'
-        self.assertHasChanged(name=True, number=True)
-
     def test_pre_save_previous(self):
         self.assertPrevious(name=None, number=None)
         self.instance.name = 'new age'
@@ -710,32 +705,39 @@ def test_descriptor(self):
         self.assertTrue(isinstance(self.tracked_class.tracker, FieldTracker))
 
     def test_pre_save_changed(self):
-        self.assertChanged(name=None, number=None, id=None)
+        self.assertChanged(name=None)  # XXX Is this odd?
         self.instance.name = 'new age'
-        self.assertChanged(name=None, number=None, id=None)
+        self.assertChanged(name=None)
         self.instance.number = 8
-        self.assertChanged(name=None, number=None, id=None)
+        self.assertChanged(name=None, number=None)
         self.instance.name = ''
-        self.assertChanged(name=None, number=None, id=None)
+        self.assertChanged(name=None, number=None)
 
-    def test_first_save(self):
+    def test_pre_save_has_changed(self):
+        self.assertHasChanged(name=True, number=False)
+        self.instance.name = 'new age'
+        self.assertHasChanged(name=True, number=False)
+        self.instance.number = 7
         self.assertHasChanged(name=True, number=True)
+
+    def test_first_save(self):
+        self.assertHasChanged(name=True, number=False)
         self.assertPrevious(name=None, number=None)
         self.assertCurrent(name='', number=None, id=None)
-        self.assertChanged(name=None, number=None, id=None)
+        self.assertChanged(name=None)
         self.instance.name = 'retro'
         self.instance.number = 4
         self.assertHasChanged(name=True, number=True)
         self.assertPrevious(name=None, number=None)
         self.assertCurrent(name='retro', number=4, id=None)
-        self.assertChanged(name=None, number=None, id=None)
+        self.assertChanged(name=None, number=None)
         # Django 1.4 doesn't have update_fields
         if django.VERSION >= (1, 5, 0):
             self.instance.save(update_fields=[])
             self.assertHasChanged(name=True, number=True)
             self.assertPrevious(name=None, number=None)
             self.assertCurrent(name='retro', number=4, id=None)
-            self.assertChanged(name=None, number=None, id=None)
+            self.assertChanged(name=None, number=None)
             self.assertRaises(ValueError, self.instance.save,
                     update_fields=['number'])
 
@@ -813,6 +815,25 @@ def test_pre_save_changed(self):
         self.instance.name = ''
         self.assertChanged(name=None)
 
+    def test_first_save(self):
+        self.assertHasChanged(name=True, number=None)
+        self.assertPrevious(name=None, number=None)
+        self.assertCurrent(name='')
+        self.assertChanged(name=None)
+        self.instance.name = 'retro'
+        self.instance.number = 4
+        self.assertHasChanged(name=True, number=None)
+        self.assertPrevious(name=None, number=None)
+        self.assertCurrent(name='retro')
+        self.assertChanged(name=None)
+
+    def test_pre_save_has_changed(self):
+        self.assertHasChanged(name=True, number=None)
+        self.instance.name = 'new age'
+        self.assertHasChanged(name=True, number=None)
+        self.instance.number = 7
+        self.assertHasChanged(name=True, number=None)
+
     def test_post_save_has_changed(self):
         self.update_instance(name='retro', number=4)
         self.assertHasChanged(name=False, number=None)
@@ -858,11 +879,6 @@ def setUp(self):
         self.trackers = [self.instance.name_tracker,
                          self.instance.number_tracker]
 
-    def test_pre_save_has_changed(self):
-        for tracker in self.trackers:
-            self.tracker = tracker
-            super(FieldTrackedModelMultiTests, self).test_pre_save_has_changed()
-
     def test_pre_save_changed(self):
         self.tracker = self.instance.name_tracker
         self.assertChanged(name=None)
@@ -879,6 +895,16 @@ def test_pre_save_changed(self):
         self.instance.number = 8
         self.assertChanged(number=None)
 
+    def test_pre_save_has_changed(self):
+        self.tracker = self.instance.name_tracker
+        self.assertHasChanged(name=True, number=None)
+        self.instance.name = 'new age'
+        self.assertHasChanged(name=True, number=None)
+        self.tracker = self.instance.number_tracker
+        self.assertHasChanged(name=None, number=False)
+        self.instance.name = 'new age'
+        self.assertHasChanged(name=None, number=False)
+
     def test_pre_save_previous(self):
         for tracker in self.trackers:
             self.tracker = tracker
@@ -1011,11 +1037,37 @@ def test_first_save(self):
             self.assertRaises(ValueError, self.instance.save,
                     update_fields=['number'])
 
+    def test_pre_save_has_changed(self):
+        self.assertHasChanged(name=True, number=True)
+        self.instance.name = 'new age'
+        self.assertHasChanged(name=True, number=True)
+        self.instance.number = 7
+        self.assertHasChanged(name=True, number=True)
+
 
 class ModelTrackedModelCustomTests(FieldTrackedModelCustomTests):
 
     tracked_class = ModelTrackedNotDefault
 
+    def test_first_save(self):
+        self.assertHasChanged(name=True, number=True)
+        self.assertPrevious(name=None, number=None)
+        self.assertCurrent(name='')
+        self.assertChanged()
+        self.instance.name = 'retro'
+        self.instance.number = 4
+        self.assertHasChanged(name=True, number=True)
+        self.assertPrevious(name=None, number=None)
+        self.assertCurrent(name='retro')
+        self.assertChanged()
+
+    def test_pre_save_has_changed(self):
+        self.assertHasChanged(name=True, number=True)
+        self.instance.name = 'new age'
+        self.assertHasChanged(name=True, number=True)
+        self.instance.number = 7
+        self.assertHasChanged(name=True, number=True)
+
     def test_pre_save_changed(self):
         self.assertChanged()
         self.instance.name = 'new age'
@@ -1030,6 +1082,16 @@ class ModelTrackedModelMultiTests(FieldTrackedModelMultiTests):
 
     tracked_class = ModelTrackedMultiple
 
+    def test_pre_save_has_changed(self):
+        self.tracker = self.instance.name_tracker
+        self.assertHasChanged(name=True, number=True)
+        self.instance.name = 'new age'
+        self.assertHasChanged(name=True, number=True)
+        self.tracker = self.instance.number_tracker
+        self.assertHasChanged(name=True, number=True)
+        self.instance.name = 'new age'
+        self.assertHasChanged(name=True, number=True)
+
     def test_pre_save_changed(self):
         self.tracker = self.instance.name_tracker
         self.assertChanged()
diff --git a/model_utils/tracker.py b/model_utils/tracker.py
index 71719356..13a726a8 100644
--- a/model_utils/tracker.py
+++ b/model_utils/tracker.py
@@ -27,9 +27,7 @@ def current(self, fields=None):
 
     def has_changed(self, field):
         """Returns ``True`` if field has changed from currently saved value"""
-        if not self.instance.pk:
-            return True
-        elif field in self.saved_data:
+        if field in self.fields:
             return self.previous(field) != self.get_field_value(field)
         else:
             raise FieldError('field "%s" not tracked' % field)
@@ -98,6 +96,15 @@ def __get__(self, instance, owner):
 
 class ModelInstanceTracker(FieldInstanceTracker):
 
+    def has_changed(self, field):
+        """Returns ``True`` if field has changed from currently saved value"""
+        if not self.instance.pk:
+            return True
+        elif field in self.saved_data:
+            return self.previous(field) != self.get_field_value(field)
+        else:
+            raise FieldError('field "%s" not tracked' % field)
+
     def changed(self):
         """Returns dict of fields that changed since save (with old values)"""
         if not self.instance.pk: