Update docs/dev/todo.rst

diff --git a/docs/dev/todo.rst b/docs/dev/todo.rst
index 4cddae5..ff92fc8 100644 (file)
--- a/docs/dev/todo.rst
+++ b/docs/dev/todo.rst
@@ -17,8 +17,7 @@ Development dependencies
 
 You'll need to install ``gunicorn`` and ``httpbin`` in order to run requests' test suite::
 
-    $ pip install gunicorn
-    $ pip install httpbin
+    $ pip install -r requirements.txt