Update on various section.

Change-Id: Ibfe0875de178505079cb13fe5077a8e620c03780
diff --git a/testing/about_system_tests.rst b/testing/about_system_tests.rst
index b1ec5de..935052f 100644
--- a/testing/about_system_tests.rst
+++ b/testing/about_system_tests.rst
@@ -2,8 +2,8 @@
    SPDX-FileCopyrightText: © 2021 Open Networking Foundation <support@opennetworking.org>
    SPDX-License-Identifier: Apache-2.0
 
-About
-=====
+Overview
+========
 
 The goal and objective of SD-Core test automation is to build a framework that
 provides highly scalable and low maintenance code which will help cover various
diff --git a/testing/sdcore_testing.rst b/testing/sdcore_testing.rst
index ed3be94..64e9899 100644
--- a/testing/sdcore_testing.rst
+++ b/testing/sdcore_testing.rst
@@ -2,8 +2,10 @@
    SPDX-FileCopyrightText: © 2021 Open Networking Foundation <support@opennetworking.org>
    SPDX-License-Identifier: Apache-2.0
 
-SD-Core Testing
-===============
+.. _sdcore-testing:
+
+Test frameworks and coverage
+============================
 
 Test Framework
 --------------