diff --git a/docs/tutorial/5-relationships-and-hyperlinked-apis.md b/docs/tutorial/5-relationships-and-hyperlinked-apis.md
index 36473ce91..50552616b 100644
--- a/docs/tutorial/5-relationships-and-hyperlinked-apis.md
+++ b/docs/tutorial/5-relationships-and-hyperlinked-apis.md
@@ -6,7 +6,6 @@ At the moment relationships within our API are represented by using primary keys
 
 Right now we have endpoints for 'snippets' and 'users', but we don't have a single entry point to our API.  To create one, we'll use a regular function-based view and the `@api_view` decorator we introduced earlier. In your `snippets/views.py` add:
 
-    from rest_framework import renderers
     from rest_framework.decorators import api_view
     from rest_framework.response import Response
     from rest_framework.reverse import reverse
diff --git a/docs/tutorial/quickstart.md b/docs/tutorial/quickstart.md
index c2dc4bea9..1c398c1ff 100644
--- a/docs/tutorial/quickstart.md
+++ b/docs/tutorial/quickstart.md
@@ -19,7 +19,7 @@ Create a new Django project named `tutorial`, then start a new app called `quick
     pip install djangorestframework
 
     # Set up a new project with a single application
-    django-admin.py startproject tutorial .
+    django-admin.py startproject tutorial
     cd tutorial
     django-admin.py startapp quickstart
 	cd ..
diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index 2e34dbe75..2d5c843e5 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -721,6 +721,7 @@ class ModelSerializer(Serializer):
         # arguments to deal with `unique_for` dates that are required to
         # be in the input data in order to validate it.
         hidden_fields = {}
+        unique_constraint_names = set()
 
         for model_field_name, field_name in model_field_mapping.items():
             try:
@@ -729,19 +730,20 @@ class ModelSerializer(Serializer):
                 continue
 
             # Include each of the `unique_for_*` field names.
-            unique_constraint_names = set([
+            unique_constraint_names |= set([
                 model_field.unique_for_date,
                 model_field.unique_for_month,
                 model_field.unique_for_year
             ])
-            unique_constraint_names -= set([None])
 
-            # Include each of the `unique_together` field names,
-            # so long as all the field names are included on the serializer.
-            for parent_class in [model] + list(model._meta.parents.keys()):
-                for unique_together_list in parent_class._meta.unique_together:
-                    if set(fields).issuperset(set(unique_together_list)):
-                        unique_constraint_names |= set(unique_together_list)
+        unique_constraint_names -= set([None])
+
+        # Include each of the `unique_together` field names,
+        # so long as all the field names are included on the serializer.
+        for parent_class in [model] + list(model._meta.parents.keys()):
+            for unique_together_list in parent_class._meta.unique_together:
+                if set(fields).issuperset(set(unique_together_list)):
+                    unique_constraint_names |= set(unique_together_list)
 
         # Now we have all the field names that have uniqueness constraints
         # applied, we can add the extra 'required=...' or 'default=...'
@@ -755,7 +757,7 @@ class ModelSerializer(Serializer):
             elif getattr(unique_constraint_field, 'auto_now', None):
                 default = timezone.now
             elif unique_constraint_field.has_default():
-                default = model_field.default
+                default = unique_constraint_field.default
             else:
                 default = empty