"Downloading public symbols" while debugging MS Test on Visual Studio 2010?

I am using MS Test with Visual Studio 2010 to write unit Tests. When I debug a Test it shows a Message box as shown below

Title : Downloading public symbols
Message : System.XXXX.dll

Has anyone else faced this issue with MS Test on Visual Studio 2010?

This problem does no开发者_高级运维t come when I run a test. Its only when I try to Debug a Test

It is probably trying to break at an exception that is thrown from the .NET framework code.

Either uncheck exception breaking in Debug => Exceptions or deactivate framework debugging in Tools => Options => Debugging => Enable Just My Code