diff --git a/modeltranslation/tests/models.py b/modeltranslation/tests/models.py
index bc25d9b..36f104b 100644
--- a/modeltranslation/tests/models.py
+++ b/modeltranslation/tests/models.py
@@ -314,26 +314,29 @@ class CustomManager2TestModel(models.Model):
 
 
 class CustomManagerAbstract(models.Manager):
-    def to_translate(self):
-        return self.get_queryset().filter(needs_translation=True)
+    pass
 
 
 class CustomManagerBaseModel(models.Model):
     needs_translation = models.BooleanField(default=False)
 
-    objects = models.Manager()
+    objects = models.Manager()  # ensures objects is the default manager
     translations = CustomManagerAbstract()
 
     class Meta:
         abstract = True
 
 
-class CustomAbstractManagerTestModel(CustomManagerBaseModel):
+class CustomManagerChildTestModel(CustomManagerBaseModel):
     title = models.CharField(ugettext_lazy('title'), max_length=255)
 
     objects = CustomManager2()
 
 
+class PlainChildTestModel(CustomManagerBaseModel):
+    title = models.CharField(ugettext_lazy('title'), max_length=255)
+
+
 # ######### Required fields testing
 
 class RequiredModel(models.Model):
diff --git a/modeltranslation/tests/tests.py b/modeltranslation/tests/tests.py
index 979a8c2..ee7f6f9 100644
--- a/modeltranslation/tests/tests.py
+++ b/modeltranslation/tests/tests.py
@@ -40,7 +40,7 @@ models = translation = None
 request = None
 
 # How many models are registered for tests.
-TEST_MODELS = 32 + (1 if MIGRATIONS else 0)
+TEST_MODELS = 33 + (1 if MIGRATIONS else 0)
 
 
 class reload_override_settings(override_settings):
@@ -2731,12 +2731,17 @@ class TestManager(ModeltranslationTestBase):
         manager = models.CustomManagerTestModel.another_mgr_name
         self.assertTrue(isinstance(manager, MultilingualManager))
 
-    def test_default_manager_for_inherited_models(self):
+    def test_default_manager_for_inherited_models_with_custom_manager(self):
         """Test if default manager is still set from local managers"""
-        manager = models.CustomAbstractManagerTestModel._meta.default_manager
+        manager = models.CustomManagerChildTestModel._meta.default_manager
         self.assertEqual('objects', manager.name)
         self.assertTrue(isinstance(manager, MultilingualManager))
-        self.assertTrue(isinstance(models.CustomAbstractManagerTestModel.translations, MultilingualManager))
+        self.assertTrue(isinstance(models.CustomManagerChildTestModel.translations, MultilingualManager))
+
+    def test_default_manager_for_inherited_models(self):
+        manager = models.PlainChildTestModel._meta.default_manager
+        self.assertEqual('objects', manager.name)
+        self.assertTrue(isinstance(models.PlainChildTestModel.translations, MultilingualManager))
 
     def test_custom_manager2(self):
         """Test if user-defined queryset is still working"""
diff --git a/modeltranslation/tests/translation.py b/modeltranslation/tests/translation.py
index 3f98fad..a101c37 100644
--- a/modeltranslation/tests/translation.py
+++ b/modeltranslation/tests/translation.py
@@ -137,7 +137,8 @@ class ManagerTestModelTranslationOptions(TranslationOptions):
 @register([
     models.CustomManagerTestModel,
     models.CustomManager2TestModel,
-    models.CustomAbstractManagerTestModel
+    models.CustomManagerChildTestModel,
+    models.PlainChildTestModel
 ])
 class CustomManagerTestModelTranslationOptions(TranslationOptions):
     fields = ('title',)