1 files changed, 25 insertions, 4 deletions
diff --git a/docs/topics/testing/tools.txt b/docs/topics/testing/tools.txt
index d3be9e2124..3adacffb35 100644
--- a/docs/topics/testing/tools.txt
+++ b/docs/topics/testing/tools.txt
@@ -109,7 +109,7 @@ Making requests
 
 Use the ``django.test.Client`` class to make requests.
 
-.. class:: Client(enforce_csrf_checks=False, **defaults)
+.. class:: Client(enforce_csrf_checks=False, json_encoder=DjangoJSONEncoder, **defaults)
 
     It requires no arguments at time of construction. However, you can use
     keywords arguments to specify some default headers. For example, this will
@@ -125,6 +125,13 @@ Use the ``django.test.Client`` class to make requests.
     The ``enforce_csrf_checks`` argument can be used to test CSRF
     protection (see above).
 
+    The ``json_encoder`` argument allows setting a custom JSON encoder for
+    the JSON serialization that's described in :meth:`post`.
+
+    .. versionchanged:: 2.1
+
+        The ``json_encoder`` argument was added.
+
     Once you have a ``Client`` instance, you can call any of the following
     methods:
 
@@ -206,9 +213,23 @@ Use the ``django.test.Client`` class to make requests.
 
             name=fred&passwd=secret
 
-        If you provide ``content_type`` (e.g. :mimetype:`text/xml` for an XML
-        payload), the contents of ``data`` will be sent as-is in the POST
-        request, using ``content_type`` in the HTTP ``Content-Type`` header.
+        If you provide ``content_type`` as :mimetype:`application/json`, a
+        ``data`` dictionary is serialized using :func:`json.dumps` with
+        :class:`~django.core.serializers.json.DjangoJSONEncoder`. You can
+        change the encoder by providing a ``json_encoder`` argument to
+        :class:`Client`. This serialization also happens for :meth:`put`,
+        :meth:`patch`, and :meth:`delete` requests.
+
+        .. versionchanged:: 2.1
+
+            The JSON serialization described above was added. In older versions,
+            you can call :func:`json.dumps` on ``data`` before passing it to
+            ``post()`` to achieve the same thing.
+
+        If you provide any other ``content_type`` (e.g. :mimetype:`text/xml`
+        for an XML payload), the contents of ``data`` are sent as-is in the
+        POST request, using ``content_type`` in the HTTP ``Content-Type``
+        header.
 
         If you don't provide a value for ``content_type``, the values in
         ``data`` will be transmitted with a content type of