If you have VS Test Host Adapter 1.0.4 installed, you'll get this on startup:
---------------------------
Microsoft SQL Server Management Studio
---------------------------
The 'VSTestHostPackage' package did not load correctly.
The problem may have been caused by a configuration change or by the installation of another extension. You can get more information by examining the file 'C:\Users\huvalo\AppData\Roaming\Microsoft\AppEnv\14.0\ActivityLog.xml'.
Restarting Visual Studio could help resolve this issue.
Continue to show this error message?
---------------------------
Yes No
---------------------------
From activity log:
<entry>
<record>55</record>
<time>2016/10/27 21:21:23.855</time>
<type>Information</type>
<source>VisualStudio</source>
<description>Entering function CVsPackageInfo::HrInstantiatePackage</description>
<guid>{4A7E4285-12F6-4CEB-B878-F029A43A5315}</guid>
</entry>
<entry>
<record>56</record>
<time>2016/10/27 21:21:23.855</time>
<type>Warning</type>
<source>VisualStudio</source>
<description>Appid denied the loading of package</description>
<guid>{4A7E4285-12F6-4CEB-B878-F029A43A5315}</guid>
</entry>
This version of SQL Server Management Studio: https://msdn.microsoft.com/en-us/library/mt238290.aspx
If you have VS Test Host Adapter 1.0.4 installed, you'll get this on startup:
From activity log: