An exception occurred while invoking executor 'executor://mstestadapter/v1': Object reference not set to an instance of an object

Question

We are using Visual Studio 2012 and Team Foundation Server 2010 in our project. Since, we are using Microsoft Fakes, we could have not used the started Test functionality of

Answer 1

Deleting app.config and packages.config, if exists, and reinstalling Entity framework via nuGet packages works for me.