diff --git a/rest_framework/authtoken/serializers.py b/rest_framework/authtoken/serializers.py
index 7c49f3305..42d67c2d3 100644
--- a/rest_framework/authtoken/serializers.py
+++ b/rest_framework/authtoken/serializers.py
@@ -18,20 +18,17 @@ class AuthTokenSerializer(serializers.Serializer):
             if user:
                 if not user.is_active:
                     msg = _('User account is disabled.')
-                    raise serializers.ValidationError(
-                        msg,
-                        code='authorization')
+                    code = 'authorization'
+                    raise serializers.ValidationError(msg, code=code)
             else:
                 msg = _('Unable to log in with provided credentials.')
-                raise serializers.ValidationError(
-                    msg,
-                    code='authorization')
+                code = 'authorization'
+                raise serializers.ValidationError(msg, code=code)
 
         else:
             msg = _('Must include "username" and "password".')
-            raise serializers.ValidationError(
-                msg,
-                code='authorization')
+            code = 'authorization'
+            raise serializers.ValidationError(msg, code=code)
 
         attrs['user'] = user
         return attrs
diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 469c573f7..27e064040 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -31,9 +31,7 @@ from rest_framework.compat import (
     MinValueValidator, duration_string, parse_duration, unicode_repr,
     unicode_to_repr
 )
-from rest_framework.exceptions import (
-    ValidationError
-)
+from rest_framework.exceptions import ValidationError
 from rest_framework.settings import api_settings
 from rest_framework.utils import html, humanize_datetime, representation
 
diff --git a/rest_framework/validators.py b/rest_framework/validators.py
index 53d5479ce..d96421542 100644
--- a/rest_framework/validators.py
+++ b/rest_framework/validators.py
@@ -147,9 +147,9 @@ class UniqueTogetherValidator(object):
         ]
         if None not in checked_values and queryset.exists():
             field_names = ', '.join(self.fields)
-            raise ValidationError(
-                self.message.format(field_names=field_names),
-                code='unique')
+            message = self.message.format(field_names=field_names)
+            code = 'unique'
+            raise ValidationError(message, code=code)
 
     def __repr__(self):
         return unicode_to_repr('<%s(queryset=%s, fields=%s)>' % (