diff --git a/tempest/api/README.rst b/tempest/api/README.rst
index 91e6ad6..a796922 100644
--- a/tempest/api/README.rst
+++ b/tempest/api/README.rst
@@ -13,7 +13,8 @@
 
 It's also important to test not only the expected positive path on
 APIs, but also to provide them with invalid data to ensure they fail
-in expected and documented ways. Over the course of the OpenStack
+in expected and documented ways. The latter type of tests is called
+``negative tests`` in Tempest source code. Over the course of the OpenStack
 project Tempest has discovered many fundamental bugs by doing just
 this.
 
@@ -22,7 +23,7 @@
 spinning up a server, image, etc, then operating on it.
 
 
-Why are these tests in tempest?
+Why are these tests in Tempest?
 -------------------------------
 
 This is one of the core missions for the Tempest project, and where it