Merge pull request #1577 from kendrahavens/updateAdapter

Add how to upgrade test adapter section

Author: v-shils

docs/test/install-third-party-unit-test-frameworks.md

@@ -52,7 +52,24 @@ Visual Studio Test Explorer can run any unit test framework that has developed a
 
 3.  In the **Category** list (labeled as **Showing**), expand the **Tools** node and then choose **Testing**.  
 
-4.  Choose a framework in the results list to navigate to a Visual Studio Marketplace page for the tool.  
-  
-## See Also  
- [Unit Test Your Code](../test/unit-test-your-code.md)
+4.  Choose a framework in the results list to navigate to a Visual Studio Marketplace page for the tool. 
+
+## Update to the latest test adapters
+
+Update to the latest stable test adapter to experience better test discovery and execution. For more information about updates to MSTest, NUnit, and xUnit test adapters, see the [Visual Studio blog](https://blogs.msdn.microsoft.com/visualstudio/2017/11/16/test-experience-improvements/).
+
+### To update to the latest stable test adapter version
+
+1. Open the Nuget Package Manager for your solution by navigating to **Tools > NuGet Package Manager > Manage NuGet Packages for Solution...**
+
+2. Click on the **Updates** tab and search for NUnit or xUnit test adapters that are installed.
+
+3. Select each test adapter, and then select the latest stable version in the drop down menu.
+
+4. Choose the **Install** button.
+
+![Upgrade Test Adapter](media/installadapter-upgrade.png)
+
+## See also
+
+- [Unit Test Your Code](../test/unit-test-your-code.md)