diff --git a/django/core/serializers/base.py b/django/core/serializers/base.py
index 190636e670..cdcc7fa36a 100644
--- a/django/core/serializers/base.py
+++ b/django/core/serializers/base.py
@@ -31,9 +31,9 @@ class Serializer(object):
         """
         self.options = options
 
-        self.stream = options.get("stream", StringIO())
-        self.selected_fields = options.get("fields")
-        self.use_natural_keys = options.get("use_natural_keys", False)
+        self.stream = options.pop("stream", StringIO())
+        self.selected_fields = options.pop("fields", None)
+        self.use_natural_keys = options.pop("use_natural_keys", False)
 
         self.start_serialization()
         for obj in queryset:
diff --git a/django/core/serializers/json.py b/django/core/serializers/json.py
index b82c0a0ec7..b8119f54d4 100644
--- a/django/core/serializers/json.py
+++ b/django/core/serializers/json.py
@@ -18,9 +18,6 @@ class Serializer(PythonSerializer):
     internal_use_only = False
 
     def end_serialization(self):
-        self.options.pop('stream', None)
-        self.options.pop('fields', None)
-        self.options.pop('use_natural_keys', None)
         simplejson.dump(self.objects, self.stream, cls=DjangoJSONEncoder, **self.options)
 
     def getvalue(self):
diff --git a/django/core/serializers/pyyaml.py b/django/core/serializers/pyyaml.py
index 2ca68fe442..c443b63bc9 100644
--- a/django/core/serializers/pyyaml.py
+++ b/django/core/serializers/pyyaml.py
@@ -38,9 +38,6 @@ class Serializer(PythonSerializer):
             super(Serializer, self).handle_field(obj, field)
 
     def end_serialization(self):
-        self.options.pop('stream', None)
-        self.options.pop('fields', None)
-        self.options.pop('use_natural_keys', None)
         yaml.dump(self.objects, self.stream, Dumper=DjangoSafeDumper, **self.options)
 
     def getvalue(self):