diff --git a/rest_framework/authtoken/views.py b/rest_framework/authtoken/views.py
index 103abb27c..1fee5068e 100644
--- a/rest_framework/authtoken/views.py
+++ b/rest_framework/authtoken/views.py
@@ -12,16 +12,13 @@ class ObtainAuthToken(APIView):
     permission_classes = ()
     parser_classes = (parsers.FormParser, parsers.MultiPartParser, parsers.JSONParser,)
     renderer_classes = (renderers.JSONRenderer,)
-    serializer_class = AuthTokenSerializer
-    model = Token
 
     def post(self, request):
-        serializer = self.serializer_class(data=request.data)
-        if serializer.is_valid():
-            user = serializer.validated_data['user']
-            token, created = Token.objects.get_or_create(user=user)
-            return Response({'token': token.key})
-        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+        serializer = AuthTokenSerializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        user = serializer.validated_data['user']
+        token, created = Token.objects.get_or_create(user=user)
+        return Response({'token': token.key})
 
 
 obtain_auth_token = ObtainAuthToken.as_view()