diff --git a/rest_framework_expiring_authtoken/views.py b/rest_framework_expiring_authtoken/views.py
index dc7fc97..779e9bc 100644
--- a/rest_framework_expiring_authtoken/views.py
+++ b/rest_framework_expiring_authtoken/views.py
@@ -21,7 +21,7 @@ def post(self, request):
         """Respond to POSTed username/password with token."""
         serializer = AuthTokenSerializer(data=request.data)
 
-        if serializer.is_valid():
+        if serializer.is_valid(raise_exception=True):
             token, _ = ExpiringToken.objects.get_or_create(
                 user=serializer.validated_data['user']
             )
@@ -36,6 +36,4 @@ def post(self, request):
             data = {'token': token.key}
             return Response(data)
 
-        return Response(serializer.errors, status=HTTP_400_BAD_REQUEST)
-
 obtain_expiring_auth_token = ObtainExpiringAuthToken.as_view()